makefile: use -fno_strict-overflow on gcc 4.2+

For gcc versions >= 4.2, use the -fno_strict_overflow compile
option. This is needed to avoid gcc optimizations that assume
signed overflow is undefined and does not wrap around (some parts
of the code assume using two complement arithmetic and
-fstrict-overflow might break them).

Makefile.defs

@@ -69,6 +69,7 @@
 #  2009-03-10  replaced DEFS with C_DEFS and INCLUDES with C_INCLUDES (DEFS
 #              and INCLUDES are now used only for "temporary" defines/includes
 #              inside modules or libs) (andrei)
+#  2009-09-20  for gcc 4.2+ use -fno-strict-overflow (andrei)
 
 
 # check if already included/exported
@@ -305,8 +306,9 @@ ifneq (,$(findstring gcc, $(CC_LONGVER)))
 				 sed -e 's/[^0-9]*-\(.*\)/\1/'| \
 				 sed -e 's/2\.9.*/2.9x/' -e 's/3\.[0-3]\..*/3.0/' -e \
 				 	's/3\.[0-3]/3.0/' -e 's/3\.[4-9]\..*/3.4/' -e \
-					's/3\.[4-9]/3.4/' -e 's/4\.[0-9]\..*/4.x/' -e \
-					's/4\.[0-9]/4.x/' )
+					's/3\.[4-9]/3.4/' -e 's/4\.[0-1]\..*/4.x/' -e \
+					's/4\.[0-1]/4.x/' -e 's/4\.[2-9]\..*/4.2+/' -e \
+					's/4\.[2-9]$$/4.2+/')
 endif
 
 ifneq (, $(findstring Sun, $(CC_LONGVER)))
@@ -670,6 +672,15 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS=-g -O9 -funroll-loops  -Wcast-align $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CPU ?= athlon64
+					CFLAGS+=-minline-all-stringops \
+							-falign-loops \
+							-ftree-vectorize \
+							-fno-strict-overflow \
+							-mtune=$(CPU)
+else
 			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CPU ?= athlon64
@@ -707,6 +718,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 
 else		# CC_NAME, gcc
 ifeq		($(CC_NAME), icc)
@@ -732,6 +744,15 @@ ifeq		($(CC_NAME), gcc)
 				#common stuff
 				CFLAGS=-m64 -g -O9 -funroll-loops  -Wcast-align $(PROFILE)
 				LDFLAGS+=-m64
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CPU ?= opteron
+					CFLAGS+=-minline-all-stringops \
+							-falign-loops \
+							-ftree-vectorize \
+							-fno-strict-overflow \
+							-mtune=$(CPU)
+else
 			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CPU ?= opteron
@@ -769,6 +790,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 
 else		# CC_NAME, gcc
 ifeq		($(CC_NAME), icc)
@@ -800,6 +822,15 @@ ifeq		($(CC_NAME), gcc)
 				# -m32 for 32 bit (default on solaris),
 				# nothing for arch. default
 				LDFLAGS+=-m64
+				#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CPU ?= ultrasparc
+					#use 32bit for now
+					CFLAGS+=-mcpu=ultrasparc  \
+							-mtune=$(CPU) \
+							-fno-strict-overflow \
+							-ftree-vectorize
+else
 				#if gcc 4.x
 ifeq			($(CC_SHORTVER), 4.x)
 					CPU ?= ultrasparc
@@ -849,6 +880,7 @@ endif			#CC_SHORTVER, 2.9x
 endif			#CC_SHORTVER, 3.0
 endif			#CC_SHORTVER, 3.4
 endif			#CC_SHORTVER, 4.x
+endif			#CC_SHORTVER, 4.2+
 	
 else		#CC_NAME, gcc
 ifeq		($(CC_NAME), suncc)
@@ -872,6 +904,15 @@ ifeq		($(CC_NAME), gcc)
 				CFLAGS=-g -O9 -funroll-loops  $(PROFILE) \
 					#-Wcast-align \
 					#-Wmissing-prototypes 
+				#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CPU ?= v8 
+					#use 32bit for now
+					CFLAGS+= -minline-all-stringops \
+							-mtune=$(CPU) \
+							-fno-strict-overflow \
+							-ftree-vectorize
+else
 				#if gcc 4.x
 ifeq			($(CC_SHORTVER), 4.x)
 					CPU ?= v8 
@@ -907,6 +948,7 @@ endif			#CC_SHORTVER, 2.9x
 endif			#CC_SHORTVER, 3.0
 endif			#CC_SHORTVER, 3.4
 endif			#CC_SHORTVER, 4.x
+endif			#CC_SHORTVER, 4.2+
 	
 else		#CC_NAME, gcc
 ifeq		($(CC_NAME), suncc)
@@ -927,6 +969,11 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS=-O9 -funroll-loops $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CFLAGS+= -ftree-vectorize -fno-strict-overflow
+					# not supported on arm: -minline-all-stringops 
+else
 			#if gcc 4.x+
 ifeq			($(CC_SHORTVER), 4.x)
 					CFLAGS+= -ftree-vectorize
@@ -954,7 +1001,8 @@ $(warning			You are using an old and unsupported gcc \
 endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
-endif			# CC_SHORTVER, 4.0
+endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers
@@ -970,6 +1018,10 @@ ifeq		($(CC_NAME), gcc)
 				#common stuff
 				CFLAGS=-march=armv6 -O9 -funroll-loops \
 						$(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CFLAGS+= -ftree-vectorize -fno-strict-overflow
+else
 			#if gcc 4.x+
 ifeq			($(CC_SHORTVER), 4.x)
 					CFLAGS+= -ftree-vectorize
@@ -996,7 +1048,8 @@ $(warning			You are using an old and unsupported gcc \
 endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
-endif			# CC_SHORTVER, 4.0
+endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers
@@ -1011,6 +1064,11 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS=-O9 -funroll-loops  $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CFLAGS+=-march=r3000 -minline-all-stringops \
+							-ftree-vectorize -fno-strict-overflow
+else
 			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CFLAGS+=-march=r3000 -minline-all-stringops \
@@ -1038,6 +1096,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers
@@ -1052,6 +1111,11 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS= -mips2 -O9 -funroll-loops $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CFLAGS+=-minline-all-stringops -ftree-vectorize \
+							-fno-strict-overflow
+else
 			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CFLAGS+=-minline-all-stringops -ftree-vectorize
@@ -1077,6 +1141,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers
@@ -1091,6 +1156,11 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS= -mips64 -O9 -funroll-loops $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CFLAGS+=-minline-all-stringops -ftree-vectorize \
+							-fno-strict-overflow
+else
 			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CFLAGS+=-minline-all-stringops -ftree-vectorize
@@ -1116,6 +1186,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers
@@ -1130,6 +1201,11 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS= -O9 -funroll-loops $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CFLAGS+= -fno-strict-overflow
+					# not supported: -minline-all-stringops
+else
 			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CFLAGS+= 
@@ -1156,6 +1232,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers
@@ -1170,6 +1247,13 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS= -O9 -funroll-loops $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CPU ?= powerpc
+					CFLAGS+=-ftree-vectorize \
+							-fno-strict-overflow \
+							-mtune=$(CPU) -maltivec
+else
 			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CPU ?= powerpc
@@ -1197,6 +1281,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers
@@ -1211,6 +1296,14 @@ ifeq		($(CC_NAME), gcc)
 				C_DEFS+=-DCC_GCC_LIKE_ASM
 				#common stuff
 				CFLAGS= -O9 -funroll-loops $(PROFILE)
+			#if gcc 4.2+
+ifeq			($(CC_SHORTVER), 4.2+)
+					CPU ?= powerpc64
+					CFLAGS+=-ftree-vectorize \
+							-fno-strict-overflow \
+							-mtune=$(CPU) -maltivec
+else
+			#if gcc 4.0+
 ifeq			($(CC_SHORTVER), 4.x)
 					CPU ?= powerpc64
 					CFLAGS+=-ftree-vectorize \
@@ -1237,6 +1330,7 @@ endif			# CC_SHORTVER, 2.9x
 endif			# CC_SHORTVER, 3.0
 endif			# CC_SHORTVER, 3.4
 endif			# CC_SHORTVER, 4.x
+endif			# CC_SHORTVER, 4.2+
 	
 else		# CC_NAME, gcc
 				#other compilers