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-rw-r--r--source4/lib/replace/cc_features.m442
1 files changed, 42 insertions, 0 deletions
diff --git a/source4/lib/replace/cc_features.m4 b/source4/lib/replace/cc_features.m4
new file mode 100644
index 0000000000..a109dfb414
--- /dev/null
+++ b/source4/lib/replace/cc_features.m4
@@ -0,0 +1,42 @@
+dnl C99 compiler check
+dnl -------------------------------------------------------
+dnl Copyright (C) Stefan (metze) Metzmacher 2004,2005
+dnl Released under the GNU GPL
+dnl -------------------------------------------------------
+dnl
+dnl adapted for libreplace by Andrew Tridgell
+
+############################################
+# Check if the compiler handles c99 struct initialization, and if not try -AC99 and -c99 flags
+# Usage: LIBREPLACE_CC_SUPPORTS_C99_STRUCT_INIT(success-action,failure-action)
+# changes CFLAGS to add -AC99 or -c99 if needed
+
+AC_DEFUN([LIBREPLACE_C99_STRUCT_INIT],
+[
+AC_MSG_CHECKING(for C99 designated initializers)
+saved_CFLAGS="$CFLAGS";
+AC_TRY_COMPILE([#include <stdio.h>],
+ [ struct foo {int x;char y;};
+ struct foo bar = { .y = 'X', .x = 1 };
+ ],
+ [AC_MSG_RESULT(yes); c99_init=yes; $1], [c99_init=no; AC_MSG_RESULT(no)])
+if test x"$c99_init" = x"no"; then
+ AC_MSG_CHECKING(for C99 designated initializers with -AC99)
+ CFLAGS="$saved_CFLAGS -AC99";
+ AC_TRY_COMPILE([#include <stdio.h>],
+ [ struct foo {int x;char y;};
+ struct foo bar = { .y = 'X', .x = 1 };
+ ],
+ [AC_MSG_RESULT(yes); c99_init=yes; $1],[AC_MSG_RESULT(no)])
+fi
+if test x"$c99_init" = x"no"; then
+ AC_MSG_CHECKING(for C99 designated initializers with -c99)
+ CFLAGS="$saved_CFLAGS -c99"
+ AC_TRY_COMPILE([#include <stdio.h>],
+ [ struct foo {int x;char y;};
+ struct foo bar = { .y = 'X', .x = 1 };
+ ],
+ [AC_MSG_RESULT(yes); $1],[AC_MSG_RESULT(no);CFLAGS="$saved_CFLAGS"; $2])
+fi
+])
+