[niepce: 20/22] Add option for libasan

[Hubert Figuière <hub src gnome org>]

commit 12ace89f8b175d1a0ac9806dee626f344f59b807
Author: Hubert Figuière <hub figuiere net>
Date:   Tue Jul 29 09:11:12 2014 +0200

    Add option for libasan

 configure.ac               |   34 ++-----
 m4/ax_cflags_gcc_option.m4 |  230 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 240 insertions(+), 24 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index ef4c8c0..2ee9ecd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -113,31 +113,17 @@ BOOST_CONVERSION
 BOOST_FORMAT
 BOOST_TEST([s])
 
-AC_LANG_PUSH(C++)
-dnl -Wmissing-noreturn -Wshadow
-if test "$GCC" = "yes"; then
-        NIEPCE_BUILD_CONFIG="$NIEPCE_BUILD_CONFIG gcc-options="
-        for option in -Wall -Wextra -Wsign-compare -Wpointer-arith \
-                      -Wchar-subscripts -Wwrite-strings \
-                      -Wunused -Wpointer-arith ; do
-                SAVE_CXXFLAGS="$CXXFLAGS"
-                CXXFLAGS="$CXXFLAGS $option"
-               NIEPCE_BUILD_CONFIG="$NIEPCE_BUILD_CONFIG$option "
-                AC_MSG_CHECKING([whether gcc understands $option])
-                AC_TRY_COMPILE([], [],
-                        has_option=yes,
-                        has_option=no,)
-                if test $has_option = no; then
-                  CXXFLAGS="$SAVE_CXXFLAGS"
-                fi
-                AC_MSG_RESULT($has_option)
-                unset has_option
-                unset SAVE_CXXFLAGS
-        done
-        unset option
-fi
-AC_LANG_POP
+AX_CFLAGS_GCC_OPTION([-Wextra -Wall -Wsign-compare -Wpointer-arith -Wchar-subscripts -Wwrite-strings 
-Wunused -Wpointer-arith])
+AX_CXXFLAGS_GCC_OPTION([-Wextra -Wall -Wsign-compare -Wpointer-arith -Wchar-subscripts -Wwrite-strings 
-Wunused -Wpointer-arith])
+
+AC_ARG_ENABLE(asan,[  --enable-asan    Turn on address sanitizer],[
+    AX_CFLAGS_GCC_OPTION([-fsanitize=address -fno-omit-frame-pointer])
+    AX_CXXFLAGS_GCC_OPTION([-fsanitize=address -fno-omit-frame-pointer])
+]
+,
+[
 
+])
 
 IT_PROG_INTLTOOL([0.35.0])
 
diff --git a/m4/ax_cflags_gcc_option.m4 b/m4/ax_cflags_gcc_option.m4
new file mode 100644
index 0000000..9a4d62a
--- /dev/null
+++ b/m4/ax_cflags_gcc_option.m4
@@ -0,0 +1,230 @@
+##### http://autoconf-archive.cryp.to/ax_cflags_gcc_option.html
+#
+# SYNOPSIS
+#
+#   AX_CFLAGS_GCC_OPTION (optionflag [,[shellvar][,[A][,[NA]]])
+#
+# DESCRIPTION
+#
+#   AX_CFLAGS_GCC_OPTION(-fvomit-frame) would show a message as like
+#   "checking CFLAGS for gcc -fvomit-frame ... yes" and adds the
+#   optionflag to CFLAGS if it is understood. You can override the
+#   shellvar-default of CFLAGS of course. The order of arguments stems
+#   from the explicit macros like AX_CFLAGS_WARN_ALL.
+#
+#   The cousin AX_CXXFLAGS_GCC_OPTION would check for an option to add
+#   to CXXFLAGS - and it uses the autoconf setup for C++ instead of C
+#   (since it is possible to use different compilers for C and C++).
+#
+#   The macro is a lot simpler than any special AX_CFLAGS_* macro (or
+#   ac_cxx_rtti.m4 macro) but allows to check for arbitrary options.
+#   However, if you use this macro in a few places, it would be great
+#   if you would make up a new function-macro and submit it to the
+#   ac-archive.
+#
+#     - $1 option-to-check-for : required ("-option" as non-value)
+#     - $2 shell-variable-to-add-to : CFLAGS (or CXXFLAGS in the other case)
+#     - $3 action-if-found : add value to shellvariable
+#     - $4 action-if-not-found : nothing
+#
+#   note: in earlier versions, $1-$2 were swapped. We try to detect the
+#   situation and accept a $2=~/-/ as being the old
+#   option-to-check-for.
+#
+#   also: there are other variants that emerged from the original macro
+#   variant which did just test an option to be possibly added.
+#   However, some compilers accept an option silently, or possibly for
+#   just another option that was not intended. Therefore, we have to do
+#   a generic test for a compiler family. For gcc we check "-pedantic"
+#   being accepted which is also understood by compilers who just want
+#   to be compatible with gcc even when not being made from gcc
+#   sources.
+#
+#   see also:
+#
+#         AX_CFLAGS_SUN_OPTION               AX_CFLAGS_HPUX_OPTION
+#         AX_CFLAGS_AIX_OPTION               AX_CFLAGS_IRIX_OPTION
+#
+# LAST MODIFICATION
+#
+#   2006-12-12
+#
+# COPYLEFT
+#
+#   Copyright (c) 2006 Guido U. Draheim <guidod gmx de>
+#
+#   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 2 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, write to the Free Software
+#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+#   02111-1307, USA.
+#
+#   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 Macro 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.
+
+AC_DEFUN([AX_CFLAGS_GCC_OPTION_OLD], [dnl
+AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_gcc_option_$2])dnl
+AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for gcc m4_ifval($2,$2,-option)],
+VAR,[VAR="no, unknown"
+ AC_LANG_SAVE
+ AC_LANG_C
+ ac_save_[]FLAGS="$[]FLAGS"
+for ac_arg dnl
+in "-pedantic -Werror % m4_ifval($2,$2,-option)"  dnl   GCC
+   "-pedantic % m4_ifval($2,$2,-option) %% no, obsolete"  dnl new GCC
+   #
+do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
+   AC_TRY_COMPILE([],[return 0;],
+   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+done
+ FLAGS="$ac_save_[]FLAGS"
+ AC_LANG_RESTORE
+])
+case ".$VAR" in
+     .ok|.ok,*) m4_ifvaln($3,$3) ;;
+   .|.no|.no,*) m4_ifvaln($4,$4) ;;
+   *) m4_ifvaln($3,$3,[
+   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
+   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
+                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
+   fi ]) ;;
+esac
+AS_VAR_POPDEF([VAR])dnl
+AS_VAR_POPDEF([FLAGS])dnl
+])
+
+
+dnl the only difference - the LANG selection... and the default FLAGS
+
+AC_DEFUN([AX_CXXFLAGS_GCC_OPTION_OLD], [dnl
+AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_gcc_option_$2])dnl
+AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for gcc m4_ifval($2,$2,-option)],
+VAR,[VAR="no, unknown"
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ ac_save_[]FLAGS="$[]FLAGS"
+for ac_arg dnl
+in "-pedantic -Werror % m4_ifval($2,$2,-option)"  dnl   GCC
+   "-pedantic % m4_ifval($2,$2,-option) %% no, obsolete"  dnl new GCC
+   #
+do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
+   AC_TRY_COMPILE([],[return 0;],
+   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+done
+ FLAGS="$ac_save_[]FLAGS"
+ AC_LANG_RESTORE
+])
+case ".$VAR" in
+     .ok|.ok,*) m4_ifvaln($3,$3) ;;
+   .|.no|.no,*) m4_ifvaln($4,$4) ;;
+   *) m4_ifvaln($3,$3,[
+   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
+   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
+                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
+   fi ]) ;;
+esac
+AS_VAR_POPDEF([VAR])dnl
+AS_VAR_POPDEF([FLAGS])dnl
+])
+
+dnl -------------------------------------------------------------------------
+
+AC_DEFUN([AX_CFLAGS_GCC_OPTION_NEW], [dnl
+AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_gcc_option_$1])dnl
+AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)],
+VAR,[VAR="no, unknown"
+ AC_LANG_SAVE
+ AC_LANG_C
+ ac_save_[]FLAGS="$[]FLAGS"
+for ac_arg dnl
+in "-pedantic -Werror % m4_ifval($1,$1,-option)"  dnl   GCC
+   "-pedantic % m4_ifval($1,$1,-option) %% no, obsolete"  dnl new GCC
+   #
+do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
+   AC_TRY_COMPILE([],[return 0;],
+   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+done
+ FLAGS="$ac_save_[]FLAGS"
+ AC_LANG_RESTORE
+])
+case ".$VAR" in
+     .ok|.ok,*) m4_ifvaln($3,$3) ;;
+   .|.no|.no,*) m4_ifvaln($4,$4) ;;
+   *) m4_ifvaln($3,$3,[
+   if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain $VAR])
+   else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"])
+                      m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"
+   fi ]) ;;
+esac
+AS_VAR_POPDEF([VAR])dnl
+AS_VAR_POPDEF([FLAGS])dnl
+])
+
+
+dnl the only difference - the LANG selection... and the default FLAGS
+
+AC_DEFUN([AX_CXXFLAGS_GCC_OPTION_NEW], [dnl
+AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_gcc_option_$1])dnl
+AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)],
+VAR,[VAR="no, unknown"
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ ac_save_[]FLAGS="$[]FLAGS"
+for ac_arg dnl
+in "-pedantic -Werror % m4_ifval($1,$1,-option)"  dnl   GCC
+   "-pedantic % m4_ifval($1,$1,-option) %% no, obsolete"  dnl new GCC
+   #
+do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
+   AC_TRY_COMPILE([],[return 0;],
+   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+done
+ FLAGS="$ac_save_[]FLAGS"
+ AC_LANG_RESTORE
+])
+case ".$VAR" in
+     .ok|.ok,*) m4_ifvaln($3,$3) ;;
+   .|.no|.no,*) m4_ifvaln($4,$4) ;;
+   *) m4_ifvaln($3,$3,[
+   if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain $VAR])
+   else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"])
+                      m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"
+   fi ]) ;;
+esac
+AS_VAR_POPDEF([VAR])dnl
+AS_VAR_POPDEF([FLAGS])dnl
+])
+
+AC_DEFUN([AX_CFLAGS_GCC_OPTION],[ifelse(m4_bregexp([$2],[-]),-1,
+[AX_CFLAGS_GCC_OPTION_NEW($@)],[AX_CFLAGS_GCC_OPTION_OLD($@)])])
+
+AC_DEFUN([AX_CXXFLAGS_GCC_OPTION],[ifelse(m4_bregexp([$2],[-]),-1,
+[AX_CXXFLAGS_GCC_OPTION_NEW($@)],[AX_CXXFLAGS_GCC_OPTION_OLD($@)])])