check for compiler support for -fno-strict-overflow before using it (tested with Debian's gcc 4.3, 4.1 and 3.4)

(closes issue #12179)
Reported by: Netview


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@107408 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configure

@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 103812 .
+# From configure.ac Revision: 107405 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for asterisk 1.4.
 #
@@ -884,6 +884,7 @@ POW_LIB
 GC_CFLAGS
 GC_LDFLAGS
 AST_DECLARATION_AFTER_STATEMENT
+AST_NO_STRICT_OVERFLOW
 GSM_INTERNAL
 KDEINIT
 KDEDIR
@@ -15688,6 +15689,19 @@ echo "${ECHO_T}no" >&6; }
 fi
 
 
+{ echo "$as_me:$LINENO: checking for -fno-strict-overflow" >&5
+echo $ECHO_N "checking for -fno-strict-overflow... $ECHO_C" >&6; }
+if $(${CC} -O2 -fno-strict-overflow -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+   { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+   AST_NO_STRICT_OVERFLOW=-fno-strict-overflow
+else
+	{ echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+	AST_NO_STRICT_OVERFLOW=
+fi
+
+
 { echo "$as_me:$LINENO: checking for res_ninit" >&5
 echo $ECHO_N "checking for res_ninit... $ECHO_C" >&6; }
 cat >conftest.$ac_ext <<_ACEOF
@@ -35806,6 +35820,7 @@ POW_LIB!$POW_LIB$ac_delim
 GC_CFLAGS!$GC_CFLAGS$ac_delim
 GC_LDFLAGS!$GC_LDFLAGS$ac_delim
 AST_DECLARATION_AFTER_STATEMENT!$AST_DECLARATION_AFTER_STATEMENT$ac_delim
+AST_NO_STRICT_OVERFLOW!$AST_NO_STRICT_OVERFLOW$ac_delim
 GSM_INTERNAL!$GSM_INTERNAL$ac_delim
 KDEINIT!$KDEINIT$ac_delim
 KDEDIR!$KDEDIR$ac_delim
@@ -35832,7 +35847,6 @@ GTK_INCLUDE!$GTK_INCLUDE$ac_delim
 GTK_LIB!$GTK_LIB$ac_delim
 PKGCONFIG!$PKGCONFIG$ac_delim
 PBX_GTK2!$PBX_GTK2$ac_delim
-GTK2_INCLUDE!$GTK2_INCLUDE$ac_delim
 _ACEOF
 
   if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -35874,12 +35888,13 @@ _ACEOF
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   cat >conf$$subs.sed <<_ACEOF
+GTK2_INCLUDE!$GTK2_INCLUDE$ac_delim
 GTK2_LIB!$GTK2_LIB$ac_delim
 CURL_CONFIG!$CURL_CONFIG$ac_delim
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 3; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 4; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5

configure.ac

@@ -354,6 +354,16 @@ else
 fi
 AC_SUBST(AST_DECLARATION_AFTER_STATEMENT)
 
+AC_MSG_CHECKING(for -fno-strict-overflow)
+if $(${CC} -O2 -fno-strict-overflow -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+   AC_MSG_RESULT(yes)
+   AST_NO_STRICT_OVERFLOW=-fno-strict-overflow
+else
+	AC_MSG_RESULT(no)
+	AST_NO_STRICT_OVERFLOW=
+fi
+AC_SUBST(AST_NO_STRICT_OVERFLOW)
+
 AC_MSG_CHECKING(for res_ninit)
 AC_LINK_IFELSE(
 	AC_LANG_PROGRAM([#include <resolv.h>],

main/Makefile

@@ -123,7 +123,7 @@ testexpr2: ast_expr2f.c ast_expr2.c ast_expr2.h
 
 channel.o: ASTCFLAGS+=$(ZAPTEL_INCLUDE)
 
-stdtime/localtime.o: ASTCFLAGS+=-fno-strict-overflow
+stdtime/localtime.o: ASTCFLAGS+=$(AST_NO_STRICT_OVERFLOW)
 
 AST_EMBED_LDSCRIPTS:=$(sort $(EMBED_LDSCRIPTS))
 AST_EMBED_LDFLAGS:=$(foreach dep,$(EMBED_LDFLAGS),$(value $(dep)))

makeopts.in

@@ -62,6 +62,7 @@ sysconfdir = @sysconfdir@
 AST_DEVMODE=@AST_DEVMODE@
 
 AST_DECLARATION_AFTER_STATEMENT=@AST_DECLARATION_AFTER_STATEMENT@
+AST_NO_STRICT_OVERFLOW=@AST_NO_STRICT_OVERFLOW@
 
 ASOUND_INCLUDE=@ALSA_INCLUDE@
 ASOUND_LIB=@ALSA_LIB@