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| author | Paul Eggert <eggert@cs.ucla.edu> | 2013-08-18 22:23:05 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2013-08-18 22:23:05 -0700 |
| commit | 51632863c2551d06415e541235d90c66fd3e8def (patch) | |
| tree | f2b5a4fde59ad4e43a482456433ff994a15f7e34 /m4 | |
| parent | dab3a8d5fe0da1fafc0143e2c780e3c6e020b705 (diff) | |
| download | emacs-51632863c2551d06415e541235d90c66fd3e8def.tar.gz | |
Merge from gnulib.
This incorporates:
2013-08-15 warnings: minor optimization
2013-08-15 warnings: check -Wfoo rather than -Wno-foo
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/warnings.m4 | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/m4/warnings.m4 b/m4/warnings.m4 index 184873283bb..5f5da51606b 100644 --- a/m4/warnings.m4 +++ b/m4/warnings.m4 @@ -1,4 +1,4 @@ -# warnings.m4 serial 8 +# warnings.m4 serial 10 dnl Copyright (C) 2008-2013 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -25,15 +25,24 @@ m4_ifdef([AS_VAR_APPEND], AC_DEFUN([gl_COMPILER_OPTION_IF], [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl +AS_LITERAL_IF([$1], + [m4_pushdef([gl_Positive], m4_bpatsubst([$1], [^-Wno-], [-W]))], + [gl_positive="$1" +case $gl_positive in + -Wno-*) gl_positive=-W`expr "X$gl_positive" : 'X-Wno-\(.*\)'` ;; +esac +m4_pushdef([gl_Positive], [$gl_positive])])dnl AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [ gl_save_compiler_FLAGS="$gl_Flags" - gl_AS_VAR_APPEND(m4_defn([gl_Flags]), [" $gl_unknown_warnings_are_errors $1"]) + gl_AS_VAR_APPEND(m4_defn([gl_Flags]), + [" $gl_unknown_warnings_are_errors ]m4_defn([gl_Positive])["]) AC_COMPILE_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])], [AS_VAR_SET(gl_Warn, [yes])], [AS_VAR_SET(gl_Warn, [no])]) gl_Flags="$gl_save_compiler_FLAGS" ]) AS_VAR_IF(gl_Warn, [yes], [$2], [$3]) +m4_popdef([gl_Positive])dnl AS_VAR_POPDEF([gl_Flags])dnl AS_VAR_POPDEF([gl_Warn])dnl ]) |