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- # Copyright © 2021 Guillem Jover <[email protected]>
- # LIBMD_CHECK_COMPILER_FLAG
- # -------------------------
- AC_DEFUN([LIBMD_CHECK_COMPILER_FLAG], [
- AS_VAR_PUSHDEF([libmd_varname_cache], [libmd_cv_cflags_$1])
- AC_CACHE_CHECK([whether $CC accepts $1], [libmd_varname_cache], [
- m4_define([libmd_check_flag], m4_bpatsubst([$1], [^-Wno-], [-W]))
- AS_VAR_COPY([libmd_save_CFLAGS], [CFLAGS])
- AS_VAR_SET([CFLAGS], ["-Werror libmd_check_flag"])
- AC_COMPILE_IFELSE([
- AC_LANG_SOURCE([[]])
- ], [
- AS_VAR_SET([libmd_varname_cache], [yes])
- ], [
- AS_VAR_SET([libmd_varname_cache], [no])
- ])
- AS_VAR_COPY([CFLAGS], [libmd_save_CFLAGS])
- ])
- AS_VAR_IF([libmd_varname_cache], [yes], [
- AS_VAR_APPEND([LIBMD_COMPILER_FLAGS], [" $1"])
- ])
- AS_VAR_POPDEF([libmd_varname_cache])
- ])
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