configure & build: Rework legacy GCC detection to parse versions outside of Jam.

Jam comparison logic is string-based, and so was detecting GCC >= 10
as being < 2. This rectifies that by removing the GCC version parsing
from Jam logic entirely, and setting various BuildConfig variables
instead.

Change-Id: I0c0ae3b9002fb5e77f9ca7a78600c91871657f03
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3293
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

build/jam/ArchitectureRules

@@ -7,18 +7,13 @@ rule ArchitectureSetup architecture
 	# architecture), if this is the first invocation of the rule, and adds
 	# the architecture to HAIKU_ARCHS, if not yet contained.
 
-	# analyze GCC version
-	local gccVersion
-		= [ FAnalyzeGCCVersion HAIKU_GCC_RAW_VERSION_$(architecture) ] ;
-	HAIKU_GCC_VERSION_$(architecture) = $(gccVersion) ;
-
 	# enable GCC -pipe option, if requested
 	local ccBaseFlags ;
 	if $(HAIKU_USE_GCC_PIPE) = 1 {
 		ccBaseFlags = -pipe ;
 	}
 
-	if $(gccVersion[1]) >= 3 {
+	if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) != 1 {
 		# disable strict aliasing on anything newer than gcc 2 as it may lead to
 		# unexpected results.
 		# TODO: remove the -fno-strict-aliasing option when all code has been
@@ -122,7 +117,7 @@ rule ArchitectureSetup architecture
 
 	HAIKU_WERROR_FLAGS_$(architecture) = ;
 
-	if $(gccVersion[1]) >= 4 {
+	if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) != 1 {
 		# TODO: Remove all these.
 		HAIKU_WERROR_FLAGS_$(architecture) += -Wno-error=unused-but-set-variable
 			-Wno-error=deprecated -Wno-error=deprecated-declarations
@@ -149,7 +144,7 @@ rule ArchitectureSetup architecture
 	# TODO: Temporary work-around. Should be defined in the compiler specs
 	HAIKU_LINKFLAGS_$(architecture) += -Xlinker --no-undefined ;
 
-	if $(gccVersion[1]) < 3 {
+	if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 		HAIKU_DEFINES_$(architecture) += _BEOS_R5_COMPATIBLE_ ;
 	}
 
@@ -222,7 +217,6 @@ rule KernelArchitectureSetup architecture
 
 	HAIKU_KERNEL_ARCH = $(HAIKU_ARCH) ;
 
-	local gccVersion = $(HAIKU_GCC_VERSION_$(architecture)) ;
 	local cpu = $(HAIKU_CPU_$(architecture)) ;
 
 	switch $(cpu) {
@@ -352,8 +346,8 @@ rule KernelArchitectureSetup architecture
 	# C/C++ flags
 	local ccBaseFlags = -finline -fno-builtin ;
 
-	if $(gccVersion[1]) >= 4 {
-		if $(HAIKU_CC_IS_CLANG_$(architecture)) != 1 {
+	if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) != 1 {
+		if ! $(HAIKU_CC_IS_CLANG_$(architecture)) {
 			# Clang does not yet understand this flag.
 			ccBaseFlags += -fno-semantic-interposition ;
 		}
@@ -363,7 +357,8 @@ rule KernelArchitectureSetup architecture
 
 	local c++BaseFlags = $(ccBaseFlags) -fno-exceptions ;
 
-	if $(gccVersion[1]) >= 3 && $(HAIKU_CC_IS_CLANG_$(architecture)) != 1 {
+	if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) != 1
+			&& $(HAIKU_CC_IS_CLANG_$(architecture)) != 1 {
 		c++BaseFlags += -fno-use-cxa-atexit ;
 	}
 
@@ -501,7 +496,7 @@ rule KernelArchitectureSetup architecture
 				} else {
 					HAIKU_BOOT_$(bootTarget:U)_LDFLAGS += -m elf_i386_haiku ;
 				}
-				if $(gccVersion[1]) >= 3 {
+				if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) != 1 {
 					HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -Wno-error=main -m32 ;
 					HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -Wno-error=main -m32 ;
 				}
@@ -514,7 +509,7 @@ rule KernelArchitectureSetup architecture
 				} else {
 					HAIKU_BOOT_$(bootTarget:U)_LDFLAGS += -m elf_i386_haiku ;
 				}
-				if $(gccVersion[1]) >= 3 {
+				if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) != 1 {
 					HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -Wno-error=main -m32 ;
 					HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -Wno-error=main -m32 ;
 				}
@@ -606,8 +601,7 @@ rule ArchitectureSetupWarnings architecture
 	# Work-around for GCC 2 problem -- despite -Wno-multichar it reports
 	# multichar warnings in headers/private/kernel/debugger_keymaps.h included
 	# by src/system/kernel/arch/x86/arch_debug_console.cpp.
-	local gccVersion = $(HAIKU_GCC_VERSION_$(architecture)) ;
-	if $(gccVersion[1]) = 2 {
+	if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 		local file = <src!system!kernel!arch!x86>arch_debug_console.o ;
 		WARNINGS on $(file) = $(WARNINGS) ;
 	}

build/jam/BuildFeatureRules

@@ -447,7 +447,7 @@ rule InitArchitectureBuildFeatures architecture
 	# Add all secondary architectures as build features (with prefix).
 	EnableBuildFeatures secondary_$(TARGET_PACKAGING_ARCHS[2-]) ;
 
-	if $(TARGET_GCC_VERSION_$(architecture)[1]) = 2 {
+	if $(TARGET_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 		EnableBuildFeatures gcc2 ;
 	}
 

build/jam/BuildSetup

@@ -239,12 +239,9 @@ HOST_ARCH ?= $(HOST_CPU) ;
 HOST_ARCHS = $(HOST_ARCH) ;
 HOST_KERNEL_ARCH = host ;
 
-# analyze GCC version
-HOST_GCC_VERSION = [ FAnalyzeGCCVersion HOST_GCC_RAW_VERSION ] ;
-
 # set packaging architecture
 HOST_PACKAGING_ARCH		?= $(HOST_CPU) ;
-if $(HOST_PACKAGING_ARCH) = x86 && $(HOST_GCC_VERSION[1]) = 2 {
+if $(HOST_PACKAGING_ARCH) = x86 && $(HOST_CC_IS_LEGACY_GCC) = 1 {
 	HOST_PACKAGING_ARCH = x86_gcc2 ;
 }
 HOST_PACKAGING_ARCHS = $(HOST_PACKAGING_ARCH) ;
@@ -276,7 +273,7 @@ HOST_C++FLAGS += -Wno-multichar ;
 HOST_PIC_CCFLAGS += -fPIC ;
 HOST_PIC_C++FLAGS += -fPIC ;
 
-if $(HOST_GCC_VERSION[1]) >= 3 {
+if $(HOST_CC_IS_LEGACY_GCC) != 1 {
 	HOST_GCC_BASE_FLAGS += -fno-strict-aliasing -fno-delete-null-pointer-checks ;
 }
 
@@ -306,7 +303,7 @@ if $(HOST_ARCH) = m68k {
 if $(HOST_PLATFORM) != darwin {
 	# fix for new changes to DSO linking policies
 	HOST_LINKFLAGS += -Xlinker --no-as-needed ;
-	if $(HOST_GCC_VERSION[1]) >= 3 {
+	if $(HOST_CC_IS_LEGACY_GCC) != 1 {
 		HOST_LINKFLAGS += -Wl,--copy-dt-needed-entries ;
 	}
 }
@@ -382,7 +379,7 @@ HOST_LIBBE = libbe_build.so ;
 
 if $(HOST_PLATFORM_HAIKU_COMPATIBLE) {
 	# the C++ standard and support libraries
-	if $(HOST_GCC_VERSION[1]) < 3 {
+	if $(HOST_CC_IS_LEGACY_GCC) = 1 {
 		HOST_LIBSTDC++ = stdc++.r4 ;
 		HOST_LIBSUPC++ = ;
 	} else {
@@ -418,7 +415,7 @@ if $(HOST_PLATFORM_HAIKU_COMPATIBLE) {
 	HOST_PTHREAD_LINKFLAGS = -pthread ;
 
 	# the C++ support library
-	if $(HOST_GCC_VERSION[1]) < 3 {
+	if $(HOST_CC_IS_LEGACY_GCC) = 1 {
 		HOST_LIBSUPC++ = ;
 	} else {
 		HOST_LIBSUPC++ = supc++ ;
@@ -586,10 +583,12 @@ local buildVars =
 	;
 
 local archDependentBuildVars =
-	ARCH CPU GCC_VERSION
+	ARCH CPU
 
 	AR CC C++ ELFEDIT LD OBJCOPY RANLIB STRIP
 
+	CC_IS_LEGACY_GCC CC_IS_CLANG
+
 	ARFLAGS ASFLAGS UNARFLAGS CPPFLAGS CCFLAGS C++FLAGS HDRS LDFLAGS
 	LINK LINKFLAGS
 

build/jam/HelperRules

@@ -208,40 +208,12 @@ rule SetPlatformCompatibilityFlagVariables
 		?= $($(varPrefix)_PLATFORM_HAIKU_COMPATIBLE) ;
 }
 
-rule FAnalyzeGCCVersion
-{
-	# FAnalyzeGCCVersion <rawVersionVariable> ;
-	#
-	local varName = $(1) ;
-	local rawVersion = $($(varName)) ;
-
-	if ! $(rawVersion) {
-		ECHO "Variable $(varName) not set. Please run ./configure or" ;
-		EXIT "specify it manually." ;
-	}
-
-	local version = ;
-	# split the raw version string at `.' and `-' characters
-	while $(rawVersion) {
-		local split = [ Match "([^.-]*)[.-](.*)" : $(rawVersion) ] ;
-		if $(split) {
-			version += $(split[1]) ;
-			rawVersion = $(split[2]) ;
-		} else {
-			version += $(rawVersion) ;
-			rawVersion = ;
-		}
-	}
-
-	return $(version) ;
-}
-
 rule SetIncludePropertiesVariables prefix : suffix
 {
 	# SetIncludePropertiesVariables <prefix> : <suffix> ;
 	#
 	suffix = $(suffix:E=) ;
-	if $($(prefix)_GCC_VERSION$(suffix)[1]) < 4 {
+	if $($(prefix)_CC_IS_LEGACY_GCC$(suffix)) {
 		$(prefix)_INCLUDES_SEPARATOR$(suffix) = -I- ;
 		$(prefix)_LOCAL_INCLUDES_OPTION$(suffix) = -I ;
 		$(prefix)_SYSTEM_INCLUDES_OPTION$(suffix) = -I ;

build/jam/OptionalPackages

@@ -41,11 +41,10 @@ if [ IsOptionalHaikuImagePackageAdded BeBook ] {
 
 # BeOSCompatibility
 if [ IsOptionalHaikuImagePackageAdded BeOSCompatibility ] {
-	if $(TARGET_ARCH) != x86 {
+	if $(TARGET_ARCH) != x86
+			|| $(TARGET_CC_IS_LEGACY_GCC_$(TARGET_PACKAGING_ARCH)) != 1 {
 		Echo "No optional package BeOSCompatibility available for"
 			"$(TARGET_ARCH)" ;
-	} else if $(TARGET_GCC_VERSION_$(TARGET_PACKAGING_ARCH)[1]) >= 4 {
-		Echo "No optional package BeOSCompatibility available for gcc4" ;
 	} else {
 		Echo "Warning: Adding BeOS compatibility symlinks. This will go away."
 			"Please fix your apps!" ;

build/jam/packages/Haiku

@@ -93,7 +93,7 @@ AddLibrariesToPackage lib
 	: [ HaikuImageGetSystemLibs ] [ HaikuImageGetPrivateSystemLibs ] ;
 
 # libnetwork.so replaces quite a few libraries
-if $(HAIKU_GCC_VERSION_$(architecture)[1]) = 2 {
+if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 	local libNetworkAliases = libsocket.so libbind.so libnet.so ;
 	local lib ;
 	for lib in $(libNetworkAliases) {

build/jam/packages/HaikuBootstrap

@@ -87,7 +87,7 @@ AddLibrariesToPackage lib
 	: [ HaikuImageGetSystemLibs ] [ HaikuImageGetPrivateSystemLibs ] ;
 
 # libnetwork.so replaces quite a few libraries
-if $(HAIKU_GCC_VERSION_$(architecture)[1]) = 2 {
+if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 	local libNetworkAliases = libsocket.so libbind.so libnet.so ;
 	local lib ;
 	for lib in $(libNetworkAliases) {

build/jam/packages/HaikuCrossDevel

@@ -93,7 +93,7 @@ for stage in _stage0 _stage1 "" {
 
 	if $(stage) != _stage0 {
 		# cpp headers
-		if $(HAIKU_GCC_VERSION_$(architecture)[1]) = 2 {
+		if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 			# GCC 2 only -- for GCC 4 they come with the DevelopmentBase package
 			CopyDirectoryToPackage $(developCrossHeadersDirTokens) c++
 				: [ FDirName $(HAIKU_TOP) headers cpp ] : 2.95.3 ;

build/jam/packages/HaikuDevel

@@ -79,7 +79,7 @@ AddHeaderDirectoryToPackage compatibility bsd : bsd ;
 AddHeaderDirectoryToPackage compatibility gnu : gnu ;
 
 # cpp headers
-if $(HAIKU_GCC_VERSION_$(architecture)[1]) = 2 {
+if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 	# GCC 2 only -- for GCC 4 they come with the gcc package
 	CopyDirectoryToPackage develop headers c++
 		: [ FDirName $(HAIKU_TOP) headers cpp ] : 2.95.3 ;

build/jam/packages/HaikuDevelSecondary

@@ -48,7 +48,7 @@ AddFilesToPackage develop lib $(architecture)
 # ABI independent stuff
 
 # cpp headers
-if $(HAIKU_GCC_VERSION_$(architecture)[1]) = 2 {
+if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 	# GCC 2 only -- for GCC 4 they come with the gcc package
 	CopyDirectoryToPackage develop headers c++
 		: [ FDirName $(HAIKU_TOP) headers cpp ] : 2.95.3 ;

build/jam/packages/HaikuSecondary

@@ -10,7 +10,7 @@ AddLibrariesToPackage lib $(architecture)
 	: [ HaikuImageGetSystemLibs ] [ HaikuImageGetPrivateSystemLibs ] ;
 
 # libnetwork.so replaces quite a few libraries
-if $(HAIKU_GCC_VERSION_$(architecture)[1]) = 2 {
+if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 	local libNetworkAliases = libsocket.so libbind.so libnet.so ;
 	local lib ;
 	for lib in $(libNetworkAliases) {

build/jam/packages/HaikuSecondaryBootstrap

@@ -11,7 +11,7 @@ AddLibrariesToPackage lib $(architecture)
 	: [ HaikuImageGetSystemLibs ] [ HaikuImageGetPrivateSystemLibs ] ;
 
 # libnetwork.so replaces quite a few libraries
-if $(HAIKU_GCC_VERSION_$(architecture)[1]) = 2 {
+if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 	local libNetworkAliases = libsocket.so libbind.so libnet.so ;
 	local lib ;
 	for lib in $(libNetworkAliases) {

configure

@@ -239,6 +239,19 @@ valid_toolchain()
 	return 1
 }
 
+# is_legacy_gcc
+#
+# Determines if the specified GCC version is a "legacy" (i.e. GCC < 4) one.
+#
+is_legacy_gcc()
+{
+	if [ `echo $1 | cut -d'.' -f1` -lt 4 ]; then
+		echo 1
+	else
+		echo 0
+	fi
+}
+
 # standard_gcc_settings
 #
 # Sets the variables for a GCC platform.
@@ -331,6 +344,8 @@ standard_gcc_settings()
 	set_variable HAIKU_CPU_$targetArch $targetCpu
 
 	get_build_tool_path CC_$targetArch "$gcc"
+	set_variable HAIKU_CC_IS_LEGACY_GCC_$targetArch \
+		`is_legacy_gcc $gccRawVersion`
 	set_variable HAIKU_CC_IS_CLANG_$targetArch $useClang
 	set_variable HAIKU_GCC_RAW_VERSION_$targetArch $gccRawVersion
 	set_variable HAIKU_GCC_MACHINE_$targetArch $gccMachine
@@ -608,6 +623,7 @@ fi
 # exported (BuildSetup) default parameter values
 #
 HOST_GCC_RAW_VERSION=`$CC -dumpversion`
+HOST_CC_IS_LEGACY_GCC=`is_legacy_gcc $HOST_GCC_RAW_VERSION`
 HOST_GCC_MACHINE=`$CC -dumpmachine`
 HAIKU_INCLUDE_SOURCES=0
 HAIKU_INCLUDE_3RDPARTY=0
@@ -1082,7 +1098,7 @@ HAIKU_HOST_BUILD_ONLY		?= "${HAIKU_HOST_BUILD_ONLY}" ;
 JAMSHELL					?= ${JAMSHELL} -c ;
 
 HOST_CC						?= ${CC} ;
-HOST_GCC_RAW_VERSION		?= ${HOST_GCC_RAW_VERSION} ;
+HOST_CC_IS_LEGACY_GCC		?= ${HOST_CC_IS_LEGACY_GCC} ;
 HOST_GCC_MACHINE			?= ${HOST_GCC_MACHINE} ;
 HOST_LD						?= ${HOST_GCC_LD} ;
 HOST_OBJCOPY				?= ${HOST_GCC_OBJCOPY} ;
@@ -1103,11 +1119,11 @@ EOF
 for targetArch in $HAIKU_PACKAGING_ARCHS; do
 	variables="
 		HAIKU_CC					HAIKU_CC
+		HAIKU_CC_IS_LEGACY_GCC		HAIKU_CC_IS_LEGACY_GCC
 		HAIKU_CC_IS_CLANG			HAIKU_CC_IS_CLANG
 		HAIKU_USE_GCC_GRAPHITE		HAIKU_USE_GCC_GRAPHITE
 		HAIKU_CPU					HAIKU_CPU
 		HAIKU_GCC_MACHINE			HAIKU_GCC_MACHINE
-		HAIKU_GCC_RAW_VERSION		HAIKU_GCC_RAW_VERSION
 		HAIKU_GCC_LIB_DIR			HAIKU_GCC_LIB_DIR
 		HAIKU_BOOT_LIBGCC			HAIKU_BOOT_LIBGCC
 		HAIKU_BOOT_LIBSUPC++		HAIKU_BOOT_LIBSUPCXX

src/add-ons/screen_savers/gravity/Jamfile

@@ -3,7 +3,7 @@ UseBuildFeatureHeaders glu ;
 UseBuildFeatureHeaders mesa ;
 
 # For GCC2
-if $(TARGET_GCC_VERSION_$(TARGET_PACKAGING_ARCH)[1]) < 3 {
+if $(TARGET_CC_IS_LEGACY_GCC_$(TARGET_PACKAGING_ARCH)) = 1 {
 	SubDirC++Flags --no-warnings ;
 }
 

src/add-ons/translators/png/Jamfile

@@ -4,7 +4,7 @@ SubDirHdrs [ FDirName $(SUBDIR) $(DOTDOT) shared ] ;
 
 AddResources PNGTranslator : PNGTranslator.rdef ;
 
-if $(TARGET_GCC_VERSION_$(TARGET_PACKAGING_ARCH)[1]) = 2 {
+if $(TARGET_CC_IS_LEGACY_GCC_$(TARGET_PACKAGING_ARCH)) = 1 {
 	SubDirCcFlags -DPNG_NO_PEDANTIC_WARNINGS ;
 }
 
@@ -17,7 +17,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 		Includes [ FGristFiles PNGTranslator.cpp PNGView.cpp ]
 			: [ BuildFeatureAttribute libpng : headers ] ;
 
-		Translator [ MultiArchDefaultGristFiles PNGTranslator ] : 
+		Translator [ MultiArchDefaultGristFiles PNGTranslator ] :
 			PNGMain.cpp
 			PNGTranslator.cpp
 			PNGView.cpp

src/apps/haiku3d/Jamfile

@@ -6,7 +6,7 @@ SEARCH_SOURCE += [ FDirName $(SUBDIR) mesh ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) texture ] ;
 
 # For GCC2
-if $(TARGET_GCC_VERSION_$(TARGET_PACKAGING_ARCH)[1]) < 3 {
+if $(TARGET_CC_IS_LEGACY_GCC_$(TARGET_PACKAGING_ARCH)) = 1 {
 	SubDirC++Flags --no-warnings ;
 }
 

src/system/boot/Jamfile

@@ -250,7 +250,7 @@ actions AtariBootPrgLd
 
 
 local extraSources = ;
-if $(TARGET_GCC_VERSION_$(TARGET_PACKAGING_ARCH)[1]) = 2 {
+if $(TARGET_CC_IS_LEGACY_GCC_$(TARGET_PACKAGING_ARCH)) = 1 {
 	extraSources += atomic.S ;
 }
 

src/system/libroot/os/arch/x86/Jamfile

@@ -13,7 +13,7 @@ for architectureObject in [ MultiArchSubDirSetup x86 x86_gcc2 ] {
 		SEARCH_SOURCE += [ FDirName $(SUBDIR) $(DOTDOT) generic ] ;
 
 		local compatibilitySources ;
-		if $(TARGET_GCC_VERSION_$(architecture)[1]) = 2 {
+		if $(TARGET_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 			compatibilitySources =
 				compatibility.c
 			;

src/tools/bfs_shell/Jamfile

@@ -20,7 +20,7 @@ DEFINES += HAIKU_BUILD_COMPATIBILITY_H __STRICT_ANSI__ ;
 	defines = [ FDefines $(defines) ] ;
 
 	local c++flags = ;
-	if $(HOST_GCC_VERSION[1]) >= 3 {
+	if $(HOST_CC_IS_LEGACY_GCC) != 1 {
 		c++flags += -std=c++11 ;
 	}