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951
m4/ax_cxx_compile_stdcxx.m4 Normal file
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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CXX_COMPILE_STDCXX(VERSION, [ext|noext], [mandatory|optional])
#
# DESCRIPTION
#
# Check for baseline language coverage in the compiler for the specified
# version of the C++ standard. If necessary, add switches to CXX and
# CXXCPP to enable support. VERSION may be '11' (for the C++11 standard)
# or '14' (for the C++14 standard).
#
# The second argument, if specified, indicates whether you insist on an
# extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g.
# -std=c++11). If neither is specified, you get whatever works, with
# preference for an extended mode.
#
# The third argument, if specified 'mandatory' or if left unspecified,
# indicates that baseline support for the specified C++ standard is
# required and that the macro should error out if no mode with that
# support is found. If specified 'optional', then configuration proceeds
# regardless, after defining HAVE_CXX${VERSION} if and only if a
# supporting mode is found.
#
# LICENSE
#
# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
# Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
# Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
# Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
# Copyright (c) 2015 Paul Norman <penorman@mac.com>
# Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
# Copyright (c) 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com>
# Copyright (c) 2019 Enji Cooper <yaneurabeya@gmail.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 11
dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
dnl (serial version number 13).
AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"],
[$1], [14], [ax_cxx_compile_alternatives="14 1y"],
[$1], [17], [ax_cxx_compile_alternatives="17 1z"],
[m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl
m4_if([$2], [], [],
[$2], [ext], [],
[$2], [noext], [],
[m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl
m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true],
[$3], [mandatory], [ax_cxx_compile_cxx$1_required=true],
[$3], [optional], [ax_cxx_compile_cxx$1_required=false],
[m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
AC_LANG_PUSH([C++])dnl
ac_success=no
m4_if([$2], [noext], [], [dnl
if test x$ac_success = xno; then
for alternative in ${ax_cxx_compile_alternatives}; do
switch="-std=gnu++${alternative}"
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
$cachevar,
[ac_save_CXX="$CXX"
CXX="$CXX $switch"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
[eval $cachevar=yes],
[eval $cachevar=no])
CXX="$ac_save_CXX"])
if eval test x\$$cachevar = xyes; then
CXX="$CXX $switch"
if test -n "$CXXCPP" ; then
CXXCPP="$CXXCPP $switch"
fi
ac_success=yes
break
fi
done
fi])
m4_if([$2], [ext], [], [dnl
if test x$ac_success = xno; then
dnl HP's aCC needs +std=c++11 according to:
dnl http://h21007.www2.hp.com/portal/download/files/unprot/aCxx/PDF_Release_Notes/769149-001.pdf
dnl Cray's crayCC needs "-h std=c++11"
for alternative in ${ax_cxx_compile_alternatives}; do
for switch in -std=c++${alternative} +std=c++${alternative} "-h std=c++${alternative}"; do
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
$cachevar,
[ac_save_CXX="$CXX"
CXX="$CXX $switch"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
[eval $cachevar=yes],
[eval $cachevar=no])
CXX="$ac_save_CXX"])
if eval test x\$$cachevar = xyes; then
CXX="$CXX $switch"
if test -n "$CXXCPP" ; then
CXXCPP="$CXXCPP $switch"
fi
ac_success=yes
break
fi
done
if test x$ac_success = xyes; then
break
fi
done
fi])
AC_LANG_POP([C++])
if test x$ax_cxx_compile_cxx$1_required = xtrue; then
if test x$ac_success = xno; then
AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.])
fi
fi
if test x$ac_success = xno; then
HAVE_CXX$1=0
AC_MSG_NOTICE([No compiler with C++$1 support was found])
else
HAVE_CXX$1=1
AC_DEFINE(HAVE_CXX$1,1,
[define if the compiler supports basic C++$1 syntax])
fi
AC_SUBST(HAVE_CXX$1)
])
dnl Test body for checking C++11 support
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_11],
_AX_CXX_COMPILE_STDCXX_testbody_new_in_11
)
dnl Test body for checking C++14 support
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14],
_AX_CXX_COMPILE_STDCXX_testbody_new_in_11
_AX_CXX_COMPILE_STDCXX_testbody_new_in_14
)
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_17],
_AX_CXX_COMPILE_STDCXX_testbody_new_in_11
_AX_CXX_COMPILE_STDCXX_testbody_new_in_14
_AX_CXX_COMPILE_STDCXX_testbody_new_in_17
)
dnl Tests for new features in C++11
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[
// If the compiler admits that it is not ready for C++11, why torture it?
// Hopefully, this will speed up the test.
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201103L
#error "This is not a C++11 compiler"
#else
namespace cxx11
{
namespace test_static_assert
{
template <typename T>
struct check
{
static_assert(sizeof(int) <= sizeof(T), "not big enough");
};
}
namespace test_final_override
{
struct Base
{
virtual ~Base() {}
virtual void f() {}
};
struct Derived : public Base
{
virtual ~Derived() override {}
virtual void f() override {}
};
}
namespace test_double_right_angle_brackets
{
template < typename T >
struct check {};
typedef check<void> single_type;
typedef check<check<void>> double_type;
typedef check<check<check<void>>> triple_type;
typedef check<check<check<check<void>>>> quadruple_type;
}
namespace test_decltype
{
int
f()
{
int a = 1;
decltype(a) b = 2;
return a + b;
}
}
namespace test_type_deduction
{
template < typename T1, typename T2 >
struct is_same
{
static const bool value = false;
};
template < typename T >
struct is_same<T, T>
{
static const bool value = true;
};
template < typename T1, typename T2 >
auto
add(T1 a1, T2 a2) -> decltype(a1 + a2)
{
return a1 + a2;
}
int
test(const int c, volatile int v)
{
static_assert(is_same<int, decltype(0)>::value == true, "");
static_assert(is_same<int, decltype(c)>::value == false, "");
static_assert(is_same<int, decltype(v)>::value == false, "");
auto ac = c;
auto av = v;
auto sumi = ac + av + 'x';
auto sumf = ac + av + 1.0;
static_assert(is_same<int, decltype(ac)>::value == true, "");
static_assert(is_same<int, decltype(av)>::value == true, "");
static_assert(is_same<int, decltype(sumi)>::value == true, "");
static_assert(is_same<int, decltype(sumf)>::value == false, "");
static_assert(is_same<int, decltype(add(c, v))>::value == true, "");
return (sumf > 0.0) ? sumi : add(c, v);
}
}
namespace test_noexcept
{
int f() { return 0; }
int g() noexcept { return 0; }
static_assert(noexcept(f()) == false, "");
static_assert(noexcept(g()) == true, "");
}
namespace test_constexpr
{
template < typename CharT >
unsigned long constexpr
strlen_c_r(const CharT *const s, const unsigned long acc) noexcept
{
return *s ? strlen_c_r(s + 1, acc + 1) : acc;
}
template < typename CharT >
unsigned long constexpr
strlen_c(const CharT *const s) noexcept
{
return strlen_c_r(s, 0UL);
}
static_assert(strlen_c("") == 0UL, "");
static_assert(strlen_c("1") == 1UL, "");
static_assert(strlen_c("example") == 7UL, "");
static_assert(strlen_c("another\0example") == 7UL, "");
}
namespace test_rvalue_references
{
template < int N >
struct answer
{
static constexpr int value = N;
};
answer<1> f(int&) { return answer<1>(); }
answer<2> f(const int&) { return answer<2>(); }
answer<3> f(int&&) { return answer<3>(); }
void
test()
{
int i = 0;
const int c = 0;
static_assert(decltype(f(i))::value == 1, "");
static_assert(decltype(f(c))::value == 2, "");
static_assert(decltype(f(0))::value == 3, "");
}
}
namespace test_uniform_initialization
{
struct test
{
static const int zero {};
static const int one {1};
};
static_assert(test::zero == 0, "");
static_assert(test::one == 1, "");
}
namespace test_lambdas
{
void
test1()
{
auto lambda1 = [](){};
auto lambda2 = lambda1;
lambda1();
lambda2();
}
int
test2()
{
auto a = [](int i, int j){ return i + j; }(1, 2);
auto b = []() -> int { return '0'; }();
auto c = [=](){ return a + b; }();
auto d = [&](){ return c; }();
auto e = [a, &b](int x) mutable {
const auto identity = [](int y){ return y; };
for (auto i = 0; i < a; ++i)
a += b--;
return x + identity(a + b);
}(0);
return a + b + c + d + e;
}
int
test3()
{
const auto nullary = [](){ return 0; };
const auto unary = [](int x){ return x; };
using nullary_t = decltype(nullary);
using unary_t = decltype(unary);
const auto higher1st = [](nullary_t f){ return f(); };
const auto higher2nd = [unary](nullary_t f1){
return [unary, f1](unary_t f2){ return f2(unary(f1())); };
};
return higher1st(nullary) + higher2nd(nullary)(unary);
}
}
namespace test_variadic_templates
{
template <int...>
struct sum;
template <int N0, int... N1toN>
struct sum<N0, N1toN...>
{
static constexpr auto value = N0 + sum<N1toN...>::value;
};
template <>
struct sum<>
{
static constexpr auto value = 0;
};
static_assert(sum<>::value == 0, "");
static_assert(sum<1>::value == 1, "");
static_assert(sum<23>::value == 23, "");
static_assert(sum<1, 2>::value == 3, "");
static_assert(sum<5, 5, 11>::value == 21, "");
static_assert(sum<2, 3, 5, 7, 11, 13>::value == 41, "");
}
// http://stackoverflow.com/questions/13728184/template-aliases-and-sfinae
// Clang 3.1 fails with headers of libstd++ 4.8.3 when using std::function
// because of this.
namespace test_template_alias_sfinae
{
struct foo {};
template<typename T>
using member = typename T::member_type;
template<typename T>
void func(...) {}
template<typename T>
void func(member<T>*) {}
void test();
void test() { func<foo>(0); }
}
} // namespace cxx11
#endif // __cplusplus >= 201103L
]])
dnl Tests for new features in C++14
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_14], [[
// If the compiler admits that it is not ready for C++14, why torture it?
// Hopefully, this will speed up the test.
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201402L
#error "This is not a C++14 compiler"
#else
namespace cxx14
{
namespace test_polymorphic_lambdas
{
int
test()
{
const auto lambda = [](auto&&... args){
const auto istiny = [](auto x){
return (sizeof(x) == 1UL) ? 1 : 0;
};
const int aretiny[] = { istiny(args)... };
return aretiny[0];
};
return lambda(1, 1L, 1.0f, '1');
}
}
namespace test_binary_literals
{
constexpr auto ivii = 0b0000000000101010;
static_assert(ivii == 42, "wrong value");
}
namespace test_generalized_constexpr
{
template < typename CharT >
constexpr unsigned long
strlen_c(const CharT *const s) noexcept
{
auto length = 0UL;
for (auto p = s; *p; ++p)
++length;
return length;
}
static_assert(strlen_c("") == 0UL, "");
static_assert(strlen_c("x") == 1UL, "");
static_assert(strlen_c("test") == 4UL, "");
static_assert(strlen_c("another\0test") == 7UL, "");
}
namespace test_lambda_init_capture
{
int
test()
{
auto x = 0;
const auto lambda1 = [a = x](int b){ return a + b; };
const auto lambda2 = [a = lambda1(x)](){ return a; };
return lambda2();
}
}
namespace test_digit_separators
{
constexpr auto ten_million = 100'000'000;
static_assert(ten_million == 100000000, "");
}
namespace test_return_type_deduction
{
auto f(int& x) { return x; }
decltype(auto) g(int& x) { return x; }
template < typename T1, typename T2 >
struct is_same
{
static constexpr auto value = false;
};
template < typename T >
struct is_same<T, T>
{
static constexpr auto value = true;
};
int
test()
{
auto x = 0;
static_assert(is_same<int, decltype(f(x))>::value, "");
static_assert(is_same<int&, decltype(g(x))>::value, "");
return x;
}
}
} // namespace cxx14
#endif // __cplusplus >= 201402L
]])
dnl Tests for new features in C++17
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[
// If the compiler admits that it is not ready for C++17, why torture it?
// Hopefully, this will speed up the test.
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201703L
#error "This is not a C++17 compiler"
#else
#include <initializer_list>
#include <utility>
#include <type_traits>
namespace cxx17
{
namespace test_constexpr_lambdas
{
constexpr int foo = [](){return 42;}();
}
namespace test::nested_namespace::definitions
{
}
namespace test_fold_expression
{
template<typename... Args>
int multiply(Args... args)
{
return (args * ... * 1);
}
template<typename... Args>
bool all(Args... args)
{
return (args && ...);
}
}
namespace test_extended_static_assert
{
static_assert (true);
}
namespace test_auto_brace_init_list
{
auto foo = {5};
auto bar {5};
static_assert(std::is_same<std::initializer_list<int>, decltype(foo)>::value);
static_assert(std::is_same<int, decltype(bar)>::value);
}
namespace test_typename_in_template_template_parameter
{
template<template<typename> typename X> struct D;
}
namespace test_fallthrough_nodiscard_maybe_unused_attributes
{
int f1()
{
return 42;
}
[[nodiscard]] int f2()
{
[[maybe_unused]] auto unused = f1();
switch (f1())
{
case 17:
f1();
[[fallthrough]];
case 42:
f1();
}
return f1();
}
}
namespace test_extended_aggregate_initialization
{
struct base1
{
int b1, b2 = 42;
};
struct base2
{
base2() {
b3 = 42;
}
int b3;
};
struct derived : base1, base2
{
int d;
};
derived d1 {{1, 2}, {}, 4}; // full initialization
derived d2 {{}, {}, 4}; // value-initialized bases
}
namespace test_general_range_based_for_loop
{
struct iter
{
int i;
int& operator* ()
{
return i;
}
const int& operator* () const
{
return i;
}
iter& operator++()
{
++i;
return *this;
}
};
struct sentinel
{
int i;
};
bool operator== (const iter& i, const sentinel& s)
{
return i.i == s.i;
}
bool operator!= (const iter& i, const sentinel& s)
{
return !(i == s);
}
struct range
{
iter begin() const
{
return {0};
}
sentinel end() const
{
return {5};
}
};
void f()
{
range r {};
for (auto i : r)
{
[[maybe_unused]] auto v = i;
}
}
}
namespace test_lambda_capture_asterisk_this_by_value
{
struct t
{
int i;
int foo()
{
return [*this]()
{
return i;
}();
}
};
}
namespace test_enum_class_construction
{
enum class byte : unsigned char
{};
byte foo {42};
}
namespace test_constexpr_if
{
template <bool cond>
int f ()
{
if constexpr(cond)
{
return 13;
}
else
{
return 42;
}
}
}
namespace test_selection_statement_with_initializer
{
int f()
{
return 13;
}
int f2()
{
if (auto i = f(); i > 0)
{
return 3;
}
switch (auto i = f(); i + 4)
{
case 17:
return 2;
default:
return 1;
}
}
}
namespace test_template_argument_deduction_for_class_templates
{
template <typename T1, typename T2>
struct pair
{
pair (T1 p1, T2 p2)
: m1 {p1},
m2 {p2}
{}
T1 m1;
T2 m2;
};
void f()
{
[[maybe_unused]] auto p = pair{13, 42u};
}
}
namespace test_non_type_auto_template_parameters
{
template <auto n>
struct B
{};
B<5> b1;
B<'a'> b2;
}
namespace test_structured_bindings
{
int arr[2] = { 1, 2 };
std::pair<int, int> pr = { 1, 2 };
auto f1() -> int(&)[2]
{
return arr;
}
auto f2() -> std::pair<int, int>&
{
return pr;
}
struct S
{
int x1 : 2;
volatile double y1;
};
S f3()
{
return {};
}
auto [ x1, y1 ] = f1();
auto& [ xr1, yr1 ] = f1();
auto [ x2, y2 ] = f2();
auto& [ xr2, yr2 ] = f2();
const auto [ x3, y3 ] = f3();
}
namespace test_exception_spec_type_system
{
struct Good {};
struct Bad {};
void g1() noexcept;
void g2();
template<typename T>
Bad
f(T*, T*);
template<typename T1, typename T2>
Good
f(T1*, T2*);
static_assert (std::is_same_v<Good, decltype(f(g1, g2))>);
}
namespace test_inline_variables
{
template<class T> void f(T)
{}
template<class T> inline T g(T)
{
return T{};
}
template<> inline void f<>(int)
{}
template<> int g<>(int)
{
return 5;
}
}
} // namespace cxx17
#endif // __cplusplus < 201703L
]])

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# =============================================================================
# https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_11.html
# =============================================================================
#
# SYNOPSIS
#
# AX_CXX_COMPILE_STDCXX_11([ext|noext], [mandatory|optional])
#
# DESCRIPTION
#
# Check for baseline language coverage in the compiler for the C++11
# standard; if necessary, add switches to CXX and CXXCPP to enable
# support.
#
# This macro is a convenience alias for calling the AX_CXX_COMPILE_STDCXX
# macro with the version set to C++11. The two optional arguments are
# forwarded literally as the second and third argument respectively.
# Please see the documentation for the AX_CXX_COMPILE_STDCXX macro for
# more information. If you want to use this macro, you also need to
# download the ax_cxx_compile_stdcxx.m4 file.
#
# LICENSE
#
# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
# Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
# Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
# Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
# Copyright (c) 2015 Paul Norman <penorman@mac.com>
# Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 18
AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX])
AC_DEFUN([AX_CXX_COMPILE_STDCXX_11], [AX_CXX_COMPILE_STDCXX([11], [$1], [$2])])

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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_pthread.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
#
# DESCRIPTION
#
# This macro figures out how to build C programs using POSIX threads. It
# sets the PTHREAD_LIBS output variable to the threads library and linker
# flags, and the PTHREAD_CFLAGS output variable to any special C compiler
# flags that are needed. (The user can also force certain compiler
# flags/libs to be tested by setting these environment variables.)
#
# Also sets PTHREAD_CC to any special C compiler that is needed for
# multi-threaded programs (defaults to the value of CC otherwise). (This
# is necessary on AIX to use the special cc_r compiler alias.)
#
# NOTE: You are assumed to not only compile your program with these flags,
# but also to link with them as well. For example, you might link with
# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
#
# If you are only building threaded programs, you may wish to use these
# variables in your default LIBS, CFLAGS, and CC:
#
# LIBS="$PTHREAD_LIBS $LIBS"
# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
# CC="$PTHREAD_CC"
#
# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
# has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
# that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
#
# Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
# PTHREAD_PRIO_INHERIT symbol is defined when compiling with
# PTHREAD_CFLAGS.
#
# ACTION-IF-FOUND is a list of shell commands to run if a threads library
# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
# is not found. If ACTION-IF-FOUND is not specified, the default action
# will define HAVE_PTHREAD.
#
# Please let the authors know if this macro fails on any platform, or if
# you have any other suggestions or comments. This macro was based on work
# by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
# from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
# Alejandro Forero Cuervo to the autoconf macro repository. We are also
# grateful for the helpful feedback of numerous users.
#
# Updated for Autoconf 2.68 by Daniel Richard G.
#
# LICENSE
#
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
# Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <https://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 25
#arctica-serial 1
AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
AC_DEFUN([AX_PTHREAD], [
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_PROG_SED])
AC_LANG_PUSH([C])
ax_pthread_ok=no
# We used to check for pthread.h first, but this fails if pthread.h
# requires special compiler flags (e.g. on Tru64 or Sequent).
# It gets checked for in the link test anyway.
# First of all, check if the user has set any of the PTHREAD_LIBS,
# etcetera environment variables, and if threads linking works using
# them:
if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
ax_pthread_save_CC="$CC"
ax_pthread_save_CFLAGS="$CFLAGS"
ax_pthread_save_LIBS="$LIBS"
AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
AC_MSG_RESULT([$ax_pthread_ok])
if test "x$ax_pthread_ok" = "xno"; then
PTHREAD_LIBS=""
PTHREAD_CFLAGS=""
fi
CC="$ax_pthread_save_CC"
CFLAGS="$ax_pthread_save_CFLAGS"
LIBS="$ax_pthread_save_LIBS"
fi
# We must check for the threads library under a number of different
# names; the ordering is very important because some systems
# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
# libraries is broken (non-POSIX).
# Create a list of thread flags to try. Items starting with a "-" are
# C compiler flags, and other items are library names, except for "none"
# which indicates that we try without any flags at all, and "pthread-config"
# which is a program returning the flags for the Pth emulation library.
ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
# The ordering *is* (sometimes) important. Some notes on the
# individual items follow:
# pthreads: AIX (must check this before -lpthread)
# none: in case threads are in libc; should be tried before -Kthread and
# other compiler flags to prevent continual compiler warnings
# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
# (Note: HP C rejects this with "bad form for `-t' option")
# -pthreads: Solaris/gcc (Note: HP C also rejects)
# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
# doesn't hurt to check since this sometimes defines pthreads and
# -D_REENTRANT too), HP C (must be checked before -lpthread, which
# is present but should not be used directly; and before -mthreads,
# because the compiler interprets this as "-mt" + "-hreads")
# -mthreads: Mingw32/gcc, Lynx/gcc
# pthread: Linux, etcetera
# --thread-safe: KAI C++
# pthread-config: use pthread-config program (for GNU Pth library)
case $host_os in
freebsd*)
# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
ax_pthread_flags="-kthread lthread $ax_pthread_flags"
;;
hpux*)
# From the cc(1) man page: "[-mt] Sets various -D flags to enable
# multi-threading and also sets -lpthread."
ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
;;
openedition*)
# IBM z/OS requires a feature-test macro to be defined in order to
# enable POSIX threads at all, so give the user a hint if this is
# not set. (We don't define these ourselves, as they can affect
# other portions of the system API in unpredictable ways.)
AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
[
# if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
AX_PTHREAD_ZOS_MISSING
# endif
],
[AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
;;
solaris*)
# On Solaris (at least, for some versions), libc contains stubbed
# (non-functional) versions of the pthreads routines, so link-based
# tests will erroneously succeed. (N.B.: The stubs are missing
# pthread_cleanup_push, or rather a function called by this macro,
# so we could check for that, but who knows whether they'll stub
# that too in a future libc.) So we'll check first for the
# standard Solaris way of linking pthreads (-mt -lpthread).
ax_pthread_flags="-mt,pthread pthread $ax_pthread_flags"
;;
esac
# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
AS_IF([test "x$GCC" = "xyes"],
[ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"])
# The presence of a feature test macro requesting re-entrant function
# definitions is, on some systems, a strong hint that pthreads support is
# correctly enabled
case $host_os in
darwin* | hpux* | linux* | osf* | solaris*)
ax_pthread_check_macro="_REENTRANT"
;;
aix*)
ax_pthread_check_macro="_THREAD_SAFE"
;;
*)
ax_pthread_check_macro="--"
;;
esac
AS_IF([test "x$ax_pthread_check_macro" = "x--"],
[ax_pthread_check_cond=0],
[ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
# Are we compiling with Clang?
AC_CACHE_CHECK([whether $CC is Clang],
[ax_cv_PTHREAD_CLANG],
[ax_cv_PTHREAD_CLANG=no
# Note that Autoconf sets GCC=yes for Clang as well as GCC
if test "x$GCC" = "xyes"; then
AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
[/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
# if defined(__clang__) && defined(__llvm__)
AX_PTHREAD_CC_IS_CLANG
# endif
],
[ax_cv_PTHREAD_CLANG=yes])
fi
])
ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
ax_pthread_clang_warning=no
# Clang needs special handling, because older versions handle the -pthread
# option in a rather... idiosyncratic way
if test "x$ax_pthread_clang" = "xyes"; then
# Clang takes -pthread; it has never supported any other flag
# (Note 1: This will need to be revisited if a system that Clang
# supports has POSIX threads in a separate library. This tends not
# to be the way of modern systems, but it's conceivable.)
# (Note 2: On some systems, notably Darwin, -pthread is not needed
# to get POSIX threads support; the API is always present and
# active. We could reasonably leave PTHREAD_CFLAGS empty. But
# -pthread does define _REENTRANT, and while the Darwin headers
# ignore this macro, third-party headers might not.)
PTHREAD_CFLAGS="-pthread"
PTHREAD_LIBS=
ax_pthread_ok=yes
# However, older versions of Clang make a point of warning the user
# that, in an invocation where only linking and no compilation is
# taking place, the -pthread option has no effect ("argument unused
# during compilation"). They expect -pthread to be passed in only
# when source code is being compiled.
#
# Problem is, this is at odds with the way Automake and most other
# C build frameworks function, which is that the same flags used in
# compilation (CFLAGS) are also used in linking. Many systems
# supported by AX_PTHREAD require exactly this for POSIX threads
# support, and in fact it is often not straightforward to specify a
# flag that is used only in the compilation phase and not in
# linking. Such a scenario is extremely rare in practice.
#
# Even though use of the -pthread flag in linking would only print
# a warning, this can be a nuisance for well-run software projects
# that build with -Werror. So if the active version of Clang has
# this misfeature, we search for an option to squash it.
AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
[ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
[ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
# Create an alternate version of $ac_link that compiles and
# links in two steps (.c -> .o, .o -> exe) instead of one
# (.c -> exe), because the warning occurs only in the second
# step
ax_pthread_save_ac_link="$ac_link"
ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"`
ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
ax_pthread_save_CFLAGS="$CFLAGS"
for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
ac_link="$ax_pthread_save_ac_link"
AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
[ac_link="$ax_pthread_2step_ac_link"
AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
[break])
])
done
ac_link="$ax_pthread_save_ac_link"
CFLAGS="$ax_pthread_save_CFLAGS"
AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
])
case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
no | unknown) ;;
*) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
esac
fi # $ax_pthread_clang = yes
if test "x$ax_pthread_ok" = "xno"; then
for ax_pthread_try_flag in $ax_pthread_flags; do
case $ax_pthread_try_flag in
none)
AC_MSG_CHECKING([whether pthreads work without any flags])
;;
-mt,pthread)
AC_MSG_CHECKING([whether pthreads work with -mt -lpthread])
PTHREAD_CFLAGS="-mt"
PTHREAD_LIBS="-lpthread"
;;
-pthread)
AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
PTHREAD_CFLAGS="$ax_pthread_try_flag"
if test "x$GCC" = "xyes"; then
# Thanks to libtool bug #13550, we have to consider the possibility
# that -nostdlib will be used during compilation at some point.
# Try to determine the first pthread library available,
# ignoring any other variants.
for ax_pthread_try_lib_flag in $ax_pthread_flags; do
case $ax_pthread_try_lib_flag in
none|-*|pthread-config)
continue
;;
*)
PTHREAD_LIBS="-l$ax_pthread_try_lib_flag"
ax_pthread_save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
# We only need to link a trivial program with
# the current library value.
# Linking should fail if the library doesn't
# exist, otherwise we should be good to go.
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
[LIBS="$ax_pthread_save_LIBS"
break],
[LIBS="$ax_pthread_save_LIBS"
PTHREAD_LIBS=""])
;;
esac
done
fi
;;
-*)
AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
PTHREAD_CFLAGS="$ax_pthread_try_flag"
;;
pthread-config)
AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
PTHREAD_CFLAGS="`pthread-config --cflags`"
PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
;;
*)
AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
PTHREAD_LIBS="-l$ax_pthread_try_flag"
;;
esac
ax_pthread_save_CFLAGS="$CFLAGS"
ax_pthread_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
# Check for various functions. We must include pthread.h,
# since some functions may be macros. (On the Sequent, we
# need a special flag -Kthread to make this header compile.)
# We check for pthread_join because it is in -lpthread on IRIX
# while pthread_create is in libc. We check for pthread_attr_init
# due to DEC craziness with -lpthreads. We check for
# pthread_cleanup_push because it is one of the few pthread
# functions on Solaris that doesn't have a non-functional libc stub.
# We try pthread_create on general principles.
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
# if $ax_pthread_check_cond
# error "$ax_pthread_check_macro must be defined"
# endif
static void routine(void *a) { a = 0; }
static void *start_routine(void *a) { return a; }],
[pthread_t th; pthread_attr_t attr;
pthread_create(&th, 0, start_routine, 0);
pthread_join(th, 0);
pthread_attr_init(&attr);
pthread_cleanup_push(routine, 0);
pthread_cleanup_pop(0) /* ; */])],
[ax_pthread_ok=yes],
[])
CFLAGS="$ax_pthread_save_CFLAGS"
LIBS="$ax_pthread_save_LIBS"
AC_MSG_RESULT([$ax_pthread_ok])
AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
PTHREAD_LIBS=""
PTHREAD_CFLAGS=""
done
fi
# Various other checks:
if test "x$ax_pthread_ok" = "xyes"; then
ax_pthread_save_CFLAGS="$CFLAGS"
ax_pthread_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
# Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
AC_CACHE_CHECK([for joinable pthread attribute],
[ax_cv_PTHREAD_JOINABLE_ATTR],
[ax_cv_PTHREAD_JOINABLE_ATTR=unknown
for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
[int attr = $ax_pthread_attr; return attr /* ; */])],
[ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
[])
done
])
AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
test "x$ax_pthread_joinable_attr_defined" != "xyes"],
[AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
[$ax_cv_PTHREAD_JOINABLE_ATTR],
[Define to necessary symbol if this constant
uses a non-standard name on your system.])
ax_pthread_joinable_attr_defined=yes
])
AC_CACHE_CHECK([whether more special flags are required for pthreads],
[ax_cv_PTHREAD_SPECIAL_FLAGS],
[ax_cv_PTHREAD_SPECIAL_FLAGS=no
case $host_os in
solaris*)
ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
;;
esac
])
AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
test "x$ax_pthread_special_flags_added" != "xyes"],
[PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
ax_pthread_special_flags_added=yes])
AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
[ax_cv_PTHREAD_PRIO_INHERIT],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
[[int i = PTHREAD_PRIO_INHERIT;
return i;]])],
[ax_cv_PTHREAD_PRIO_INHERIT=yes],
[ax_cv_PTHREAD_PRIO_INHERIT=no])
])
AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
test "x$ax_pthread_prio_inherit_defined" != "xyes"],
[AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
ax_pthread_prio_inherit_defined=yes
])
CFLAGS="$ax_pthread_save_CFLAGS"
LIBS="$ax_pthread_save_LIBS"
# More AIX lossage: compile with *_r variant
if test "x$GCC" != "xyes"; then
case $host_os in
aix*)
AS_CASE(["x/$CC"],
[x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
[#handle absolute path differently from PATH based program lookup
AS_CASE(["x$CC"],
[x/*],
[AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
[AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
;;
esac
fi
fi
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
AC_SUBST([PTHREAD_LIBS])
AC_SUBST([PTHREAD_CFLAGS])
AC_SUBST([PTHREAD_CC])
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test "x$ax_pthread_ok" = "xyes"; then
ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
:
else
ax_pthread_ok=no
$2
fi
AC_LANG_POP
])dnl AX_PTHREAD

461
m4/nx-macros.m4 Normal file
View File

@@ -0,0 +1,461 @@
dnl nx-macros.m4. Generated from xorg-macros.m4.in xorgversion.m4 by configure.
dnl
dnl Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
dnl Copyright (c) 2017, Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
dnl
dnl Permission is hereby granted, free of charge, to any person obtaining a
dnl copy of this software and associated documentation files (the "Software"),
dnl to deal in the Software without restriction, including without limitation
dnl the rights to use, copy, modify, merge, publish, distribute, sublicense,
dnl and/or sell copies of the Software, and to permit persons to whom the
dnl Software is furnished to do so, subject to the following conditions:
dnl
dnl The above copyright notice and this permission notice (including the next
dnl paragraph) shall be included in all copies or substantial portions of the
dnl Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dnl IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
dnl THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
dnl DEALINGS IN THE SOFTWARE.
# NX_COMPILER_BRAND
# -------------------
# Checks for various brands of compilers and sets flags as appropriate:
# GNU gcc - relies on AC_PROG_CC (via AC_PROG_CC_C99) to set GCC to "yes"
# GNU g++ - relies on AC_PROG_CXX to set GXX to "yes"
# clang compiler - sets CLANGCC to "yes"
# Intel compiler - sets INTELCC to "yes"
# Sun/Oracle Solaris Studio cc - sets SUNCC to "yes"
#
# Derived from https://cgit.freedesktop.org/xorg/util/macros/ and adapted to
# nxcomp{,shad}.
AC_DEFUN([NX_COMPILER_BRAND], [
AC_LANG_CASE(
[C], [
AC_REQUIRE([AC_PROG_CC_C99])
],
[C++], [
AC_REQUIRE([AC_PROG_CXX])
]
)
AC_CHECK_DECL([__clang__], [CLANGCC="yes"], [CLANGCC="no"])
AC_CHECK_DECL([__INTEL_COMPILER], [INTELCC="yes"], [INTELCC="no"])
AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"])
]) # NX_COMPILER_BRAND
# NX_TESTSET_CFLAG(<variable>, <flag>, [<alternative flag>, ...])
# ---------------
# Test if the compiler works when passed the given flag as a command line argument.
# If it succeeds, the flag is appended to the given variable. If not, it tries the
# next flag in the list until there are no more options.
#
# Note that this does not guarantee that the compiler supports the flag as some
# compilers will simply ignore arguments that they do not understand, but we do
# attempt to weed out false positives by using -Werror=unknown-warning-option and
# -Werror=unused-command-line-argument
#
# Derived from https://cgit.freedesktop.org/xorg/util/macros/ and adapted to
# nxcomp{,shad}.
AC_DEFUN([NX_TESTSET_CFLAG], [
m4_if([$#], 0, [m4_fatal([NX_TESTSET_CFLAG was given with an unsupported number of arguments])])
m4_if([$#], 1, [m4_fatal([NX_TESTSET_CFLAG was given with an unsupported number of arguments])])
AC_LANG_COMPILER_REQUIRE
AC_LANG_CASE(
[C], [
AC_REQUIRE([AC_PROG_CC_C99])
define([PREFIX], [C])
define([CACHE_PREFIX], [cc])
define([COMPILER], [$CC])
],
[C++], [
define([PREFIX], [CXX])
define([CACHE_PREFIX], [cxx])
define([COMPILER], [$CXX])
]
)
[nx_testset_save_]PREFIX[FLAGS]="$PREFIX[FLAGS]"
if test "x$[nx_testset_]CACHE_PREFIX[_unknown_warning_option]" = "x" ; then
PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unknown-warning-option"
AC_CACHE_CHECK([if ]COMPILER[ supports -Werror=unknown-warning-option],
[nx_cv_]CACHE_PREFIX[_flag_unknown_warning_option],
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
[nx_cv_]CACHE_PREFIX[_flag_unknown_warning_option=yes],
[nx_cv_]CACHE_PREFIX[_flag_unknown_warning_option=no]))
[nx_testset_]CACHE_PREFIX[_unknown_warning_option]=$[nx_cv_]CACHE_PREFIX[_flag_unknown_warning_option]
PREFIX[FLAGS]="$[nx_testset_save_]PREFIX[FLAGS]"
fi
if test "x$[nx_testset_]CACHE_PREFIX[_unused_command_line_argument]" = "x" ; then
if test "x$[nx_testset_]CACHE_PREFIX[_unknown_warning_option]" = "xyes" ; then
PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unknown-warning-option"
fi
PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unused-command-line-argument"
AC_CACHE_CHECK([if ]COMPILER[ supports -Werror=unused-command-line-argument],
[nx_cv_]CACHE_PREFIX[_flag_unused_command_line_argument],
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
[nx_cv_]CACHE_PREFIX[_flag_unused_command_line_argument=yes],
[nx_cv_]CACHE_PREFIX[_flag_unused_command_line_argument=no]))
[nx_testset_]CACHE_PREFIX[_unused_command_line_argument]=$[nx_cv_]CACHE_PREFIX[_flag_unused_command_line_argument]
PREFIX[FLAGS]="$[nx_testset_save_]PREFIX[FLAGS]"
fi
found="no"
m4_foreach([flag], m4_cdr($@), [
if test $found = "no" ; then
if test "x$nx_testset_]CACHE_PREFIX[_unknown_warning_option" = "xyes" ; then
PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unknown-warning-option"
fi
if test "x$nx_testset_]CACHE_PREFIX[_unused_command_line_argument" = "xyes" ; then
PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unused-command-line-argument"
fi
PREFIX[FLAGS]="$PREFIX[FLAGS] ]flag["
dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname
AC_MSG_CHECKING([if ]COMPILER[ supports ]flag[])
cacheid=AS_TR_SH([nx_cv_]CACHE_PREFIX[_flag_]flag[])
AC_CACHE_VAL($cacheid,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([int i;])],
[eval $cacheid=yes],
[eval $cacheid=no])])
PREFIX[FLAGS]="$[nx_testset_save_]PREFIX[FLAGS]"
eval supported=\$$cacheid
AC_MSG_RESULT([$supported])
if test "$supported" = "yes" ; then
$1="$$1 ]flag["
found="yes"
fi
fi
])
]) # NX_TESTSET_CFLAG
# NX_COMPILER_FLAGS
# ---------------
# Defines BASE_CFLAGS or BASE_CXXFLAGS to contain a set of command line
# arguments supported by the selected compiler which do NOT alter the generated
# code. These arguments will cause the compiler to print various warnings
# during compilation AND turn a conservative set of warnings into errors.
#
# The set of flags supported by BASE_CFLAGS and BASE_CXXFLAGS will grow in
# future versions of util-macros as options are added to new compilers.
#
# Derived from https://cgit.freedesktop.org/xorg/util/macros/ and adapted to
# nxcomp{,shad}.
AC_DEFUN([NX_COMPILER_FLAGS], [
AC_REQUIRE([NX_COMPILER_BRAND])
AC_ARG_ENABLE(selective-werror,
AS_HELP_STRING([--disable-selective-werror],
[Turn off selective compiler errors. (default: enabled)]),
[SELECTIVE_WERROR=$enableval],
[SELECTIVE_WERROR=yes])
AC_LANG_CASE(
[C], [
define([PREFIX], [C])
],
[C++], [
define([PREFIX], [CXX])
]
)
# -v is too short to test reliably with NX_TESTSET_CFLAG
if test "x$SUNCC" = "xyes"; then
[BASE_]PREFIX[FLAGS]="-v"
else
[BASE_]PREFIX[FLAGS]=""
fi
# This chunk of warnings were those that existed in the legacy CWARNFLAGS
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wall])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wpointer-arith])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-declarations])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wformat=2], [-Wformat])
AC_LANG_CASE(
[C], [
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wstrict-prototypes])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-prototypes])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wnested-externs])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wbad-function-cast])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wold-style-definition], [-fd])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wdeclaration-after-statement])
]
)
# This chunk adds additional warnings that could catch undesired effects.
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wunused])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wuninitialized])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wshadow])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-noreturn])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-format-attribute])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wredundant-decls])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wlogical-op])
# These are currently disabled because they are noisy. They will be enabled
# in the future once the codebase is sufficiently modernized to silence
# them. For now, I don't want them to drown out the other warnings.
# NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wparentheses])
# NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wcast-align])
# NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wcast-qual])
# Turn some warnings into errors, so we don't accidentally get successful builds
# when there are problems that should be fixed.
if test "x$SELECTIVE_WERROR" = "xyes" ; then
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=implicit], [-errwarn=E_NO_EXPLICIT_TYPE_GIVEN -errwarn=E_NO_IMPLICIT_DECL_ALLOWED])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=nonnull])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=init-self])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=main])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=missing-braces])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=sequence-point])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=return-type], [-errwarn=E_FUNC_HAS_NO_RETURN_STMT])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=trigraphs])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=array-bounds])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=write-strings])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=address])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=int-to-pointer-cast], [-errwarn=E_BAD_PTR_INT_COMBINATION])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=pointer-to-int-cast]) # Also -errwarn=E_BAD_PTR_INT_COMBINATION
else
AC_MSG_WARN([You have chosen not to turn some select compiler warnings into errors. This should not be necessary. Please report why you needed to do so in a bug report at $PACKAGE_BUGREPORT])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wimplicit])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wnonnull])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Winit-self])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmain])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-braces])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wsequence-point])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wreturn-type])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wtrigraphs])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Warray-bounds])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wwrite-strings])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Waddress])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wint-to-pointer-cast])
NX_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wpointer-to-int-cast])
fi
AC_SUBST([BASE_]PREFIX[FLAGS])
]) # NX_COMPILER_FLAGS
# NX_STRICT_OPTION
# -----------------------
#
# Add configure option to enable strict compilation flags, such as treating
# warnings as fatal errors.
# If --enable-strict-compilation is passed to configure, adds strict flags to
# $BASE_CFLAGS or $BASE_CXXFLAGS.
#
# Also exports $STRICT_CFLAGS for use in other tests or when strict compilation
# is unconditionally desired.
AC_DEFUN([NX_STRICT_OPTION], [
AC_REQUIRE([NX_COMPILER_FLAGS])
AC_ARG_ENABLE(strict-compilation,
AS_HELP_STRING([--enable-strict-compilation],
[Enable all warnings from compiler and make them errors (default: disabled)]),
[STRICT_COMPILE=$enableval], [STRICT_COMPILE=no])
AC_LANG_CASE(
[C], [
define([PREFIX], [C])
],
[C++], [
define([PREFIX], [CXX])
]
)
[STRICT_]PREFIX[FLAGS]=""
NX_TESTSET_CFLAG([[STRICT_]PREFIX[FLAGS]], [-pedantic])
NX_TESTSET_CFLAG([[STRICT_]PREFIX[FLAGS]], [-Werror], [-errwarn])
# Earlier versions of gcc (eg: 4.2) support -Werror=attributes, but do not
# activate it with -Werror, so we add it here explicitly.
NX_TESTSET_CFLAG([[STRICT_]PREFIX[FLAGS]], [-Werror=attributes])
if test "x$STRICT_COMPILE" = "xyes"; then
[BASE_]PREFIX[FLAGS]="$[BASE_]PREFIX[FLAGS] $[STRICT_]PREFIX[FLAGS]"
fi
AC_SUBST([STRICT_]PREFIX[FLAGS])
AC_SUBST([BASE_]PREFIX[FLAGS])
]) # NX_STRICT_OPTION
# NX_DEFAULT_OPTIONS
# --------------------
#
# Defines default options for X.Org-like modules.
#
AC_DEFUN([NX_DEFAULT_OPTIONS], [
AC_REQUIRE([AC_PROG_INSTALL])
NX_COMPILER_FLAGS
NX_STRICT_OPTION
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])],
[AC_SUBST([AM_DEFAULT_VERBOSITY], [1])])
]) # NX_DEFAULT_OPTIONS
# NX_CHECK_MALLOC_ZERO
# ----------------------
# Minimum version: 1.0.0
#
# Defines {MALLOC,XMALLOC,XTMALLOC}_ZERO_CFLAGS appropriately if
# malloc(0) returns NULL. Packages should add one of these cflags to
# their AM_CFLAGS (or other appropriate *_CFLAGS) to use them.
AC_DEFUN([NX_CHECK_MALLOC_ZERO],[
AC_ARG_ENABLE(malloc0returnsnull,
AS_HELP_STRING([--enable-malloc0returnsnull],
[malloc(0) returns NULL (default: auto)]),
[MALLOC_ZERO_RETURNS_NULL=$enableval],
[MALLOC_ZERO_RETURNS_NULL=auto])
AC_MSG_CHECKING([whether malloc(0) returns NULL])
if test "x$MALLOC_ZERO_RETURNS_NULL" = xauto; then
AC_RUN_IFELSE([AC_LANG_PROGRAM([
#include <stdlib.h>
],[
char *m0, *r0, *c0, *p;
m0 = malloc(0);
p = malloc(10);
r0 = realloc(p,0);
c0 = calloc(0,10);
exit((m0 == 0 || r0 == 0 || c0 == 0) ? 0 : 1);
])],
[MALLOC_ZERO_RETURNS_NULL=yes],
[MALLOC_ZERO_RETURNS_NULL=no],
[MALLOC_ZERO_RETURNS_NULL=yes])
fi
AC_MSG_RESULT([$MALLOC_ZERO_RETURNS_NULL])
if test "x$MALLOC_ZERO_RETURNS_NULL" = xyes; then
MALLOC_ZERO_CFLAGS="-DMALLOC_0_RETURNS_NULL"
XMALLOC_ZERO_CFLAGS=$MALLOC_ZERO_CFLAGS
XTMALLOC_ZERO_CFLAGS="$MALLOC_ZERO_CFLAGS -DXTMALLOC_BC"
else
MALLOC_ZERO_CFLAGS=""
XMALLOC_ZERO_CFLAGS=""
XTMALLOC_ZERO_CFLAGS=""
fi
AC_SUBST([MALLOC_ZERO_CFLAGS])
AC_SUBST([XMALLOC_ZERO_CFLAGS])
AC_SUBST([XTMALLOC_ZERO_CFLAGS])
]) # NX_CHECK_MALLOC_ZERO
dnl Check to see if we're running under Cygwin32.
AC_DEFUN([NX_BUILD_ON_CYGWIN32],
[AC_CACHE_CHECK([for Cygwin32 environment], nxconf_cv_cygwin32,
[AC_TRY_COMPILE(,[return __CYGWIN32__;],
nxconf_cv_cygwin32=yes, nxconf_cv_cygwin32=no)
rm -f conftest*])
CYGWIN32=
test "$nxconf_cv_cygwin32" = yes && CYGWIN32=yes
]) # NX_BUILD_ON_CYGWIN32
dnl Check whether we're building on a AMD64.
AC_DEFUN([NX_BUILD_ON_AMD64],
[AC_CACHE_CHECK([for Amd64 environment], nxconf_cv_amd64,
[AC_TRY_COMPILE(,[return (__amd64__ || __x86_64__);],
nxconf_cv_amd64=yes, nxconf_cv_amd64=no)
rm -f conftest*])
AMD64=
test "$nxconf_cv_amd64" = yes && AMD64=yes
]) # NX_BUILD_ON_AMD64
dnl Check for Darwin environment.
AC_DEFUN([NX_BUILD_ON_DARWIN],
[AC_CACHE_CHECK([for Darwin environment], nxconf_cv_darwin,
[AC_TRY_COMPILE(,[return __APPLE__;],
nxconf_cv_darwin=yes, nxconf_cv_darwin=no)
rm -f conftest*])
DARWIN=
test "$nxconf_cv_darwin" = yes && DARWIN=yes
]) # NX_BUILD_ON_DARWIN
# Check to see if we're running under Solaris.
AC_DEFUN([NX_BUILD_ON_SUN],
[AC_CACHE_CHECK([for Solaris environment], nxconf_cv_sun,
[AC_TRY_COMPILE(,[return __sun;],
nxconf_cv_sun=yes, nxconf_cv_sun=no)
rm -f conftest*])
SUN=
test "$nxconf_cv_sun" = yes && SUN=yes
]) # NX_BUILD_ON_SUN
# Check to see if we're running under FreeBSD.
AC_DEFUN([NX_BUILD_ON_FreeBSD],
[AC_CACHE_CHECK([for FreeBSD environment], nxconf_cv_freebsd,
[AC_TRY_COMPILE(,[return __FreeBSD__;],
nxconf_cv_freebsd=yes, nxconf_cv_freebsd=no)
rm -f conftest*])
FreeBSD=
test "$nxconf_cv_freebsd" = yes && FreeBSD=yes
]) # NX_BUILD_ON_FreeBSD
# Check to see if we're generating binaries in ELF format.
AC_DEFUN([NX_TARGET_USE_ELF],
[AC_CACHE_CHECK([if target system is ELF-based], [nxconf_cv_targetelf],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[
#ifndef __ELF__
#error not an ELF-based system
error!
#endif
]],
[[
]])],
[nxconf_cv_targetelf=yes], [nxconf_cv_targetelf=no])])
AM_CONDITIONAL([TARGET_ELF], [test x"$nxconf_cv_targetelf" = "xyes"])
]) # NX_TARGET_USE_ELF
AC_DEFUN([LIBJPEG_FALLBACK_CHECK],[
AC_MSG_CHECKING([for libjpeg shared library file and headers])
AC_CHECK_LIB([jpeg], [jpeg_destroy_compress],
[have_jpeg_lib=yes], [have_jpeg_lib=no])
AC_CHECK_HEADERS([jpeglib.h],
[have_jpeg_headers=yes], [have_jpeg_headers=no])
if test x"$have_jpeg_lib" = "xyes" && test x"$have_jpeg_headers" = "xyes"; then
AC_MSG_RESULT([yes])
JPEG_CFLAGS=""
JPEG_LIBS="-ljpeg"
else
AC_MSG_RESULT([no])
AC_MSG_FAILURE([Could not find libjpeg on your system, make sure
the JPEG shared library and header files are installed.])
fi
]) # LIBJPEG_FALLBACK_CHECK
AC_DEFUN([ZLIB_FALLBACK_CHECK],[
AC_MSG_CHECKING([for zlib shared library file and headers])
AC_CHECK_LIB([z], [inflateEnd],
[have_zlib_lib=yes], [have_zlib_lib=no])
AC_CHECK_HEADERS([zlib.h],
[have_zlib_headers=yes], [have_zlib_headers=no])
if test x"$have_zlib_lib" = "xyes" && test x"$have_zlib_headers" = "xyes"; then
AC_MSG_RESULT([yes])
Z_CFLAGS=""
Z_LIBS="-lz"
else
AC_MSG_RESULT([no])
AC_MSG_FAILURE([Could not find zlib on your system, make sure
the zlib shared library and header files are installed.])
fi
]) # ZLIB_FALLBACK_CHECK

179
m4/nx-xtrans.m4 Normal file
View File

@@ -0,0 +1,179 @@
dnl
dnl Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
dnl
dnl Permission is hereby granted, free of charge, to any person obtaining a
dnl copy of this software and associated documentation files (the "Software"),
dnl to deal in the Software without restriction, including without limitation
dnl the rights to use, copy, modify, merge, publish, distribute, sublicense,
dnl and/or sell copies of the Software, and to permit persons to whom the
dnl Software is furnished to do so, subject to the following conditions:
dnl
dnl The above copyright notice and this permission notice (including the next
dnl paragraph) shall be included in all copies or substantial portions of the
dnl Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dnl IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
dnl THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
dnl DEALINGS IN THE SOFTWARE.
dnl
# NX_XTRANS_TCP_FLAGS()
# ------------------
# Find needed libraries for TCP sockets, and check for IPv6 support
AC_DEFUN([NX_XTRANS_TCP_FLAGS],[
# SVR4 hides these in libraries other than libc
AC_SEARCH_LIBS(socket, [socket])
AC_SEARCH_LIBS(gethostbyname, [nsl])
if test "$ac_cv_search_socket$ac_cv_search_gethostbyname" = "nono"; then
AC_CHECK_LIB([ws2_32],[main])
fi
# Needs to come after above checks for libsocket & libnsl for SVR4 systems
AC_ARG_ENABLE(ipv6,
AS_HELP_STRING([--enable-ipv6],[Enable IPv6 support]),
[IPV6CONN=$enableval],
[AC_CHECK_FUNC(getaddrinfo,[IPV6CONN=yes],[IPV6CONN=no])])
AC_MSG_CHECKING([if IPv6 support should be built])
if test "$IPV6CONN" = "yes"; then
AC_DEFINE(IPv6,1,[Support IPv6 for TCP connections])
fi
AC_MSG_RESULT($IPV6CONN)
# 4.3BSD-Reno added a new member to struct sockaddr_in
AC_CHECK_MEMBER([struct sockaddr_in.sin_len],
AC_DEFINE([BSD44SOCKETS],1,
[Define to 1 if `struct sockaddr_in' has a `sin_len' member]), [], [
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
])
# POSIX.1g changed the type of pointer passed to getsockname/getpeername/etc.
AC_CHECK_TYPES([socklen_t], [], [], [
AC_INCLUDES_DEFAULT
#include <sys/socket.h>])
# XPG4v2/UNIX95 added msg_control - check to see if we need to define
# _XOPEN_SOURCE to get it (such as on Solaris)
AC_CHECK_MEMBER([struct msghdr.msg_control], [], [],
[
AC_INCLUDES_DEFAULT
#include <sys/socket.h>
])
# First try for Solaris in C99 compliant mode, which requires XPG6/UNIX03
if test "x$ac_cv_member_struct_msghdr_msg_control" = xno; then
unset ac_cv_member_struct_msghdr_msg_control
AC_MSG_NOTICE([trying again with _XOPEN_SOURCE=600])
AC_CHECK_MEMBER([struct msghdr.msg_control],
[AC_DEFINE([_XOPEN_SOURCE], [600],
[Defined if needed to expose struct msghdr.msg_control])
], [], [
#define _XOPEN_SOURCE 600
AC_INCLUDES_DEFAULT
#include <sys/socket.h>
])
fi
# If that didn't work, fall back to XPG5/UNIX98 with C89
if test "x$ac_cv_member_struct_msghdr_msg_control" = xno; then
unset ac_cv_member_struct_msghdr_msg_control
AC_MSG_NOTICE([trying again with _XOPEN_SOURCE=500])
AC_CHECK_MEMBER([struct msghdr.msg_control],
[AC_DEFINE([_XOPEN_SOURCE], [500],
[Defined if needed to expose struct msghdr.msg_control])
], [], [
#define _XOPEN_SOURCE 500
AC_INCLUDES_DEFAULT
#include <sys/socket.h>
])
fi
]) # NX_XTRANS_TCP_FLAGS
# NX_XTRANS_CONNECTION_FLAGS()
# -------------------------
# Standard checks for which Xtrans transports to use by the Xorg packages
# that use Xtrans functions
AC_DEFUN([NX_XTRANS_CONNECTION_FLAGS],[
AC_REQUIRE([AC_CANONICAL_HOST])
[case $host_os in
mingw*) unixdef="no" ;;
*) unixdef="yes" ;;
esac]
AC_ARG_ENABLE(unix-transport,
AS_HELP_STRING([--enable-unix-transport],[Enable UNIX domain socket transport]),
[UNIXCONN=$enableval], [UNIXCONN=$unixdef])
AC_MSG_CHECKING([if Xtrans should support UNIX socket connections])
if test "$UNIXCONN" = "yes"; then
AC_DEFINE(UNIXCONN,1,[Support UNIX socket connections])
fi
AC_MSG_RESULT($UNIXCONN)
AC_ARG_ENABLE(tcp-transport,
AS_HELP_STRING([--enable-tcp-transport],[Enable TCP socket transport]),
[TCPCONN=$enableval], [TCPCONN=yes])
AC_MSG_CHECKING([if Xtrans should support TCP socket connections])
AC_MSG_RESULT($TCPCONN)
if test "$TCPCONN" = "yes"; then
AC_DEFINE(TCPCONN,1,[Support TCP socket connections])
NX_XTRANS_TCP_FLAGS
fi
AC_ARG_ENABLE(nxcomp-transport,
AS_HELP_STRING([--enable-nxcomp-transport],[Enable nxcomp mediated transport]),
[NXCOMPCONN=$enableval], [NXCOMPCONN=yes])
AC_MSG_CHECKING([if Xtrans should support nxcomp mediated connections])
AC_MSG_RESULT($NXCOMPCONN)
if test "$NXCOMPCONN" = "yes"; then
AC_DEFINE(NX_TRANS_SOCKET,1,[Support nxcomp mediated socket connections])
AC_DEFINE(NX_TRANS_EXIT,1,[Support nxcomp NX_TRANS_EXIT feature])
NX_XTRANS_TCP_FLAGS
fi
]) # NX_XTRANS_CONNECTION_FLAGS
# NX_XTRANS_SECURE_RPC_FLAGS()
# -------------------------
# Check for Secure RPC functions - must come after NX_XTRANS_TCP_FLAGS
# so that any necessary networking libraries are already found
AC_DEFUN([NX_XTRANS_SECURE_RPC_FLAGS],
[AC_REQUIRE([NX_XTRANS_TCP_FLAGS])
AC_ARG_ENABLE(secure-rpc,
AS_HELP_STRING([--enable-secure-rpc],[Enable Secure RPC]),
[SECURE_RPC=$enableval], [SECURE_RPC="try"])
if test "x$SECURE_RPC" = "xyes" -o "x$SECURE_RPC" = "xtry" ; then
FOUND_SECURE_RPC="no"
AC_CHECK_FUNCS([authdes_seccreate authdes_create],
[FOUND_SECURE_RPC="yes"])
if test "x$FOUND_SECURE_RPC" = "xno" ; then
if test "x$SECURE_RPC" = "xyes" ; then
AC_MSG_ERROR([Secure RPC requested, but required functions not found])
fi
SECURE_RPC="no"
else
dnl FreeBSD keeps getsecretkey in librpcsvc
AC_SEARCH_LIBS(getsecretkey, [rpcsvc])
SECURE_RPC="yes"
fi
fi
AC_MSG_CHECKING([if Secure RPC authentication ("SUN-DES-1") should be supported])
if test "x$SECURE_RPC" = "xyes" ; then
AC_DEFINE(SECURE_RPC, 1, [Support Secure RPC ("SUN-DES-1") authentication for X11 clients])
fi
AC_MSG_RESULT($SECURE_RPC)
]) # NX_XTRANS_SECURE_RPC_FLAGS
# the following originates from libxtrans/configure.ac
# sticky bit
#
# if any system exists without sticky dir bits this
# needs to be redone with a real autoconf test
sticky_bit_define="-DHAS_STICKY_DIR_BIT"
AC_SUBST(sticky_bit_define)