dnl this special exception to the GPL to apply to your modified version as
dnl well.
-dnl Check if flag in a envvar is supported by compiler and append
-dnl "backup" variable
+dnl Check if FLAG in ENV-VAR is supported by compiler and append it
+dnl to WHERE-TO-APPEND variable
dnl CC_CHECK_FLAG_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG])
+
AC_DEFUN([CC_CHECK_FLAG_APPEND], [
AC_CACHE_CHECK([if $CC supports flag $3 in envvar $2],
AS_TR_SH([cc_cv_$2_$3]),
- [eval "AS_TR_SH([cc_save_$2])='${$2}'"
- eval "AS_TR_SH([$2])='-Werror $3'"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
+ [eval "AS_TR_SH([cc_save_$2])='${$2}'"
+ eval "AS_TR_SH([$2])='-Werror $3'"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
[eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
[eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
- eval "AS_TR_SH([$2])='$cc_save_$2'"])
+ eval "AS_TR_SH([$2])='$cc_save_$2'"])
AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
[eval "$1='${$1} $3'"])
done
])
+dnl Check if the flag is supported by linker (cacheable)
+dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
dnl Check if the flag is supported by linker
*-freebsd* | *-openbsd*) ;;
*)
dnl First of all check for the --no-undefined variant of GNU ld. This allows
- dnl for a much more readable commandline, so that people can understand what
+ dnl for a much more readable command line, so that people can understand what
dnl it does without going to look for what the heck -z defs does.
for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
- break
+ break
done
- ;;
+ ;;
esac
AC_SUBST([LDFLAGS_NOUNDEFINED])
[cc_flag_visibility_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
CC_CHECK_CFLAGS_SILENT([-fvisibility=hidden],
- cc_cv_flag_visibility='yes',
- cc_cv_flag_visibility='no')
+ cc_cv_flag_visibility='yes',
+ cc_cv_flag_visibility='no')
CFLAGS="$cc_flag_visibility_save_CFLAGS"])
AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
$2],
[AS_IF([test "x$3" = "x"], [AC_MSG_ERROR([*** builtin function not found: $1()])],
[AC_DEFINE([HAVE_]m4_defn([UPNAME]), 0)
- $3])]
+ $3])]
)
m4_popdef([UPNAME])
])