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| author | Alan Third <alan@idiocy.org> | 2020-09-03 21:56:03 +0100 |
|---|---|---|
| committer | Alan Third <alan@idiocy.org> | 2020-09-03 21:56:03 +0100 |
| commit | 4ea928e14f486ae8b89c0cdf1d19d3dc3d6498a2 (patch) | |
| tree | b01ec38c86b9f36cb598d86baf29f8eefc804975 /configure.ac | |
| parent | 00b22239ab7cd8bd6af6a234ceb673b43dd01df4 (diff) | |
| download | emacs-4ea928e14f486ae8b89c0cdf1d19d3dc3d6498a2.tar.gz | |
* configure.ac (GNU_OBJC_CFLAGS): Check ObjC defaults to C99. (bug#43167)
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index dd2adb7e740..0bcff587e8a 100644 --- a/configure.ac +++ b/configure.ac @@ -1900,8 +1900,7 @@ tmp_CPPFLAGS="$CPPFLAGS" tmp_CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS -x objective-c" CFLAGS="$CFLAGS -x objective-c" -# Recent versions of GCC don't use C99 to compile Obj-C. -GNU_OBJC_CFLAGS="-std=c99" +GNU_OBJC_CFLAGS="" LIBS_GNUSTEP= if test "${with_ns}" != no; then # macfont.o requires macuvs.h which is absent after 'make extraclean', @@ -1917,7 +1916,7 @@ if test "${with_ns}" != no; then elif flags=$( (gnustep-config --objc-flags) 2>/dev/null); then NS_IMPL_GNUSTEP=yes NS_GNUSTEP_CONFIG=yes - GNU_OBJC_CFLAGS="$GNU_OBJC_CFLAGS $flags" + GNU_OBJC_CFLAGS="$flags" LIBS_GNUSTEP=$(gnustep-config --gui-libs) || exit elif test -f $GNUSTEP_CONFIG_FILE; then NS_IMPL_GNUSTEP=yes @@ -2067,6 +2066,20 @@ if test "${HAVE_NS}" = yes; then AC_DEFINE(NATIVE_OBJC_INSTANCETYPE, 1, [Define if ObjC compiler supports instancetype natively.]) fi + + AC_CACHE_CHECK( + [if the Objective C compiler defaults to C99], + [emacs_cv_objc_c99], + [AC_LANG_PUSH([Objective C]) + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([], [[for (int i = 0;;);]])], + emacs_cv_objc_c99=yes, + emacs_cv_objc_c99=no) + AC_LANG_POP([Objective C])]) + + if test x$emacs_cv_objc_c99 = xno ; then + GNU_OBJC_CFLAGS="$GNU_OBJC_CFLAGS -std=c99" + fi fi HAVE_W32=no |