diff options
Diffstat (limited to 'source4/lib/replace/cc_features.m4')
| -rw-r--r-- | source4/lib/replace/cc_features.m4 | 42 |
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 +]) + |