* m4/ax_check_compile_flag.m4: New. Imported from http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html. * configure.ac: Ensure AX_* macros are expanded. (WARNINGS_CXXFLAGS): Add `-Wno-unused-local-typedefs' if the C++ compiler supports this flag. --- ChangeLog | 11 +++++++ configure.ac | 11 +++++-- m4/ax_check_compile_flag.m4 | 74 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 94 insertions(+), 2 deletions(-) create mode 100644 m4/ax_check_compile_flag.m4 diff --git a/ChangeLog b/ChangeLog index c8c159b..ee0aacd 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,14 @@ +2014-06-27 Roland Levillain <roland@lrde.epita.fr> + + Avoid warnings about unused local typedefs. + + * m4/ax_check_compile_flag.m4: New. + Imported from + http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html. + * configure.ac: Ensure AX_* macros are expanded. + (WARNINGS_CXXFLAGS): Add `-Wno-unused-local-typedefs' if the C++ + compiler supports this flag. + 2014-06-26 Roland Levillain <roland@lrde.epita.fr> Make Olena more compatible with BSD Make. diff --git a/configure.ac b/configure.ac index a9c59e5..6dadbea 100644 --- a/configure.ac +++ b/configure.ac @@ -1,4 +1,4 @@ -# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 EPITA +# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 EPITA # Research and Development Laboratory (LRDE). # # This file is part of Olena. @@ -15,7 +15,8 @@ # You should have received a copy of the GNU General Public License # along with Olena. If not, see <http://www.gnu.org/licenses/>. -m4_pattern_forbid([^OLN_]) +dnl Catch macros that are not expanded. +m4_pattern_forbid([^(AX|OLN)_]) AC_PREREQ([2.61]) @@ -107,6 +108,12 @@ case "$CXX" in ;; esac +# Avoid warnings about unused local typedefs, which are used as a +# concept checking means in Milena (`-Wunused-local-typedefs' is +# enabled by `-Wall' in GCC since version 4.8). +AX_CHECK_COMPILE_FLAG([-Wno-unused-local-typedefs], + [WARNINGS_CXXFLAGS="$WARNINGS_CXXFLAGS -Wno-unused-local-typedefs"]) + # ------------------------------ # # C++ compiler flags for tests. # diff --git a/m4/ax_check_compile_flag.m4 b/m4/ax_check_compile_flag.m4 new file mode 100644 index 0000000..51df0c0 --- /dev/null +++ b/m4/ax_check_compile_flag.m4 @@ -0,0 +1,74 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) +# +# DESCRIPTION +# +# Check whether the given FLAG works with the current language's compiler +# or gives an error. (Warnings, however, are ignored) +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# If EXTRA-FLAGS is defined, it is added to the current language's default +# flags (e.g. CFLAGS) when the check is done. The check is thus made with +# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to +# force the compiler to issue an error when a bad flag is given. +# +# INPUT gives an alternative input source to AC_COMPILE_IFELSE. +# +# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this +# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. +# +# LICENSE +# +# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> +# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> +# +# This program is free software: you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation, either version 3 of the License, or (at your +# option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +# Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see <http://www.gnu.org/licenses/>. +# +# As a special exception, the respective Autoconf Macro's copyright owner +# gives unlimited permission to copy, distribute and modify the configure +# scripts that are the output of Autoconf when processing the Macro. You +# need not follow the terms of the GNU General Public License when using +# or distributing such scripts, even though portions of the text of the +# Macro appear in them. The GNU General Public License (GPL) does govern +# all other use of the material that constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the Autoconf +# Macro released by the Autoconf Archive. When you make and distribute a +# modified version of the Autoconf Macro, you may extend this special +# exception to the GPL to apply to your modified version as well. + +#serial 3 + +AC_DEFUN([AX_CHECK_COMPILE_FLAG], +[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" + AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], + [AS_VAR_SET(CACHEVAR,[yes])], + [AS_VAR_SET(CACHEVAR,[no])]) + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) +AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes], + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_COMPILE_FLAGS -- 1.7.10.4