Stub out an optional LDAP-based auth backend

configure.ac

@@ -260,10 +260,12 @@ LIBS=$SAVE_LIBS
 AC_SUBST(RESOLV_LIBS)
 
 have_ldap="no"
+info_ldap="No. LDAP auth backend will be unavailable."
 AC_CHECK_HEADER(ldap.h,[
 	AC_CHECK_LIB(ldap, ldap_init,[
 		LDAP_LIBS="-lldap"
 		have_ldap="yes"
+		info_ldap="Yes. LDAP auth backend will be available."
 	])
 ])
 AM_CONDITIONAL(HAVE_LDAP,test "$have_ldap" = "yes")
@@ -717,5 +719,6 @@ Imported libraries:
   libical:         ${info_libical}
 
 Optional libraries:
+  LDAP:            ${info_ldap}
   Check:           ${info_check}
 ])

src/libs/msgapi/Bongo.rules

@@ -44,6 +44,14 @@ libauthsqlite3_la_CPPFLAGS = $(AM_CPPFLAGS) $(SQLITE_CFLAGS)
 libauthsqlite3_la_LIBADD =				\
 	$(SQLITE_LIBS)
 
+if HAVE_LDAP
+auth_LTLIBRARIES += libauthldap.la
+endif
+
+libauthldap_la_SOURCES = src/libs/msgapi/auth-backends/ldap.c
+libauthldap_la_CPPFLAGS = $(AM_CPPFLAGS)
+libauthldap_la_LIBADD = $(LDAP_LIBS)
+
 src/libs/msgapi/all: libbongomsgapi.la $(auth_LTLIBRARIES)
 src/libs/msgapi/clean: clean
 src/libs/msgapi/install:

src/libs/msgapi/auth-backends/ldap.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <config.h>
+#include <xpl.h>
+#include <msgapi.h>
+
+/* returns 0 on success */
+int
+AuthLdap_Install(void)
+{
+	// TODO
+	return -1;
+}
+
+int
+AuthLdap_FindUser(const char *user)
+{
+	return -1;
+}
+
+int
+AuthLdap_VerifyPassword(const char *user, const char *password)
+{
+	return -1;
+}
+
+/* "Write" functions below */
+
+int
+AuthLdap_AddUser(const char *user)
+{
+	return -1;
+}
+
+int
+AuthLdap_SetPassword(const char *user, const char *password)
+{
+	return -1;
+}
+
+int
+AuthLdap_InterfaceVersion(void)
+{
+	return 1;
+}
+
+int
+main (int argc, char *argv[])
+{
+	printf("This cannot be run directly");
+	return (-1);
+}