Remove all _XOPEN_SOURCE defines in 'configure'

configure

@@ -164,8 +164,9 @@ check_compile_run 'whether OpenBSDs fclose() (illegally) calls close()' \
 OUR_CPPFLAGS="$OUR_CPPFLAGS -DBROKEN_FCLOSE"
 }
 check_define __sun && check_define __SVR4 && solaris_detected=true
-issolaris && for i in 700 600; do
-	check_compile_add_cppflag "whether _XOPEN_SOURCE=$i is suitable for C99 mode" "-D_XOPEN_SOURCE=$i" "#include <unistd.h>" && break
+issolaris && for i in 200809L 200112L; do
+	check_compile_add_cppflag "whether _POSIX_C_SOURCE=$i is suitable for C99 mode" "-DMAX_POSIX_VERSION=$i" \
+	'#define _POSIX_C_SOURCE MAX_POSIX_VERSION\n#include <unistd.h>' && break
 done
 
 echo "CC=$CC">config.mak

src/allocator_thread.c

@@ -1,7 +1,8 @@
 #undef _GNU_SOURCE
 #define _GNU_SOURCE
-#undef _POSIX_C_SOURCE
-#define _POSIX_C_SOURCE 200809L
+//#ifndef _POSIX_C_SOURCE
+//#define _POSIX_C_SOURCE MAX_POSIX_VERSION
+//#endif
 #define _DARWIN_C_SOURCE
 #include <limits.h>
 #include <pthread.h>

src/main.c

@@ -7,9 +7,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#undef _POSIX_C_SOURCE
-#define _POSIX_C_SOURCE 200809L
-#ifndef _XOPEN_SOURCE
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE MAX_POSIX_VERSION
+#endif
+#ifndef IS_SOLARIS
 #define _XOPEN_SOURCE 700
 #endif
 #include <stdio.h>