BaseTools GCC: introduce GCC5 toolchain to support GCC v5.x in LTO mode

This adds support for GCC 5.x in LTO mode for IA32, X64, ARM and
AARCH64. Due to the fact that the GCC project switched to a new
numbering scheme where the first digit is now incremented for every
major release, the new toolchain is simply called 'GCC5', and is
intended to support all GCC v5.x releases.

Since IA32 and X64 enable compiler optimizations (-Os) for both DEBUG
and RELEASE builds, LTO support is equally enabled for both targets.
On ARM and AARCH64, DEBUG builds are not optimized, and so the LTO
optimizations are only enabled for RELEASE.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

2 files changed, 169 insertions, 1 deletions

diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index 10ac21e42c..d88454a898 100644
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -197,6 +197,9 @@ DEFINE GCC48_X64_PREFIX        = ENV(GCC48_BIN)
 DEFINE GCC49_IA32_PREFIX       = ENV(GCC49_BIN)

 DEFINE GCC49_X64_PREFIX        = ENV(GCC49_BIN)

 

+DEFINE GCC5_IA32_PREFIX        = ENV(GCC5_BIN)

+DEFINE GCC5_X64_PREFIX         = ENV(GCC5_BIN)

+

 DEFINE UNIX_IASL_BIN           = ENV(IASL_PREFIX)iasl

 DEFINE WIN_ASL_BIN_DIR         = C:\ASL

 DEFINE WIN_IASL_BIN            = DEF(WIN_ASL_BIN_DIR)\iasl.exe

@@ -366,6 +369,12 @@ DEFINE SOURCERY_CYGWIN_TOOLS = /cygdrive/c/Program Files/CodeSourcery/Sourcery G
 #                             Required to build platforms or ACPI tables:

 #                               Intel(r) ACPI Compiler from

 #                               https://acpica.org/downloads

+#   GCC5        -Linux,Windows-  Requires:

+#                             GCC 5 with LTO support, targeting x86_64-linux-gnu, aarch64-linux-gnu, or arm-linux-gnueabi

+#                        Optional:

+#                             Required to build platforms or ACPI tables:

+#                               Intel(r) ACPI Compiler from

+#                               https://acpica.org/downloads

 #   CLANG35     -Linux,Windows-  Requires:

 #                             Clang v3.5 or later, and GNU binutils targeting aarch64-linux-gnu or arm-linux-gnueabi

 #                        Optional:

@@ -4452,6 +4461,27 @@ DEFINE GCC49_AARCH64_DLINK2_FLAGS    = DEF(GCC48_AARCH64_DLINK2_FLAGS)
 DEFINE GCC49_ARM_ASLDLINK_FLAGS      = DEF(GCC48_ARM_ASLDLINK_FLAGS)

 DEFINE GCC49_AARCH64_ASLDLINK_FLAGS  = DEF(GCC48_AARCH64_ASLDLINK_FLAGS)

 

+DEFINE GCC5_IA32_CC_FLAGS            = DEF(GCC49_IA32_CC_FLAGS) -flto -fno-builtin

+DEFINE GCC5_X64_CC_FLAGS             = DEF(GCC49_X64_CC_FLAGS) -flto -fno-builtin -DUSING_LTO

+DEFINE GCC5_IA32_X64_DLINK_COMMON    = DEF(GCC49_IA32_X64_DLINK_COMMON)

+DEFINE GCC5_IA32_X64_ASLDLINK_FLAGS  = DEF(GCC49_IA32_X64_ASLDLINK_FLAGS)

+DEFINE GCC5_IA32_X64_DLINK_FLAGS     = DEF(GCC49_IA32_X64_DLINK_FLAGS) -flto

+DEFINE GCC5_IA32_DLINK2_FLAGS        = DEF(GCC49_IA32_DLINK2_FLAGS)

+DEFINE GCC5_X64_DLINK_FLAGS          = DEF(GCC49_X64_DLINK_FLAGS) -flto

+DEFINE GCC5_X64_DLINK2_FLAGS         = DEF(GCC49_X64_DLINK2_FLAGS)

+DEFINE GCC5_ASM_FLAGS                = DEF(GCC49_ASM_FLAGS)

+DEFINE GCC5_ARM_ASM_FLAGS            = DEF(GCC49_ARM_ASM_FLAGS)

+DEFINE GCC5_AARCH64_ASM_FLAGS        = DEF(GCC49_AARCH64_ASM_FLAGS)

+DEFINE GCC5_ARM_CC_FLAGS             = DEF(GCC49_ARM_CC_FLAGS)

+DEFINE GCC5_AARCH64_CC_FLAGS         = DEF(GCC49_AARCH64_CC_FLAGS)

+DEFINE GCC5_AARCH64_CC_XIPFLAGS      = DEF(GCC49_AARCH64_CC_XIPFLAGS)

+DEFINE GCC5_ARM_DLINK_FLAGS          = DEF(GCC49_ARM_DLINK_FLAGS)

+DEFINE GCC5_ARM_DLINK2_FLAGS         = DEF(GCC49_ARM_DLINK2_FLAGS)

+DEFINE GCC5_AARCH64_DLINK_FLAGS      = DEF(GCC49_AARCH64_DLINK_FLAGS)

+DEFINE GCC5_AARCH64_DLINK2_FLAGS     = DEF(GCC49_AARCH64_DLINK2_FLAGS)

+DEFINE GCC5_ARM_ASLDLINK_FLAGS       = DEF(GCC49_ARM_ASLDLINK_FLAGS)

+DEFINE GCC5_AARCH64_ASLDLINK_FLAGS   = DEF(GCC49_AARCH64_ASLDLINK_FLAGS)

+

 ####################################################################################

 #

 # Unix GCC And Intel Linux ACPI Compiler

@@ -5186,6 +5216,140 @@ RELEASE_GCC49_AARCH64_DLINK_FLAGS  = DEF(GCC49_AARCH64_DLINK_FLAGS)
 

 ####################################################################################

 #

+# GCC 5 - This configuration is used to compile under Linux to produce

+#         PE/COFF binaries using GCC 5

+#

+####################################################################################

+*_GCC5_*_*_FAMILY                = GCC

+

+*_GCC5_*_MAKE_PATH               = DEF(GCC5_IA32_PREFIX)make

+*_GCC5_*_*_DLL                   = ENV(GCC5_DLL)

+*_GCC5_*_ASL_PATH                = DEF(UNIX_IASL_BIN)

+

+*_GCC5_*_PP_FLAGS                = DEF(GCC_PP_FLAGS)

+*_GCC5_*_ASLPP_FLAGS             = DEF(GCC_ASLPP_FLAGS)

+*_GCC5_*_ASLCC_FLAGS             = DEF(GCC_ASLCC_FLAGS)

+*_GCC5_*_VFRPP_FLAGS             = DEF(GCC_VFRPP_FLAGS)

+*_GCC5_*_APP_FLAGS               =

+*_GCC5_*_ASL_FLAGS               = DEF(IASL_FLAGS)

+*_GCC5_*_ASL_OUTFLAGS            = DEF(IASL_OUTFLAGS)

+

+##################

+# GCC5 IA32 definitions

+##################

+*_GCC5_IA32_OBJCOPY_PATH         = DEF(GCC5_IA32_PREFIX)objcopy

+*_GCC5_IA32_CC_PATH              = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_SLINK_PATH           = DEF(GCC5_IA32_PREFIX)gcc-ar

+*_GCC5_IA32_DLINK_PATH           = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_ASLDLINK_PATH        = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_ASM_PATH             = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_PP_PATH              = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_VFRPP_PATH           = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_ASLCC_PATH           = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_ASLPP_PATH           = DEF(GCC5_IA32_PREFIX)gcc

+*_GCC5_IA32_RC_PATH              = DEF(GCC5_IA32_PREFIX)objcopy

+

+*_GCC5_IA32_ASLCC_FLAGS          = DEF(GCC_ASLCC_FLAGS) -m32 -fno-lto

+*_GCC5_IA32_ASLDLINK_FLAGS       = DEF(GCC5_IA32_X64_ASLDLINK_FLAGS) -Wl,-m,elf_i386

+*_GCC5_IA32_ASM_FLAGS            = DEF(GCC5_ASM_FLAGS) -m32 -march=i386

+*_GCC5_IA32_DLINK_FLAGS          = DEF(GCC5_IA32_X64_DLINK_FLAGS) -Os -Wl,-m,elf_i386,--oformat=elf32-i386

+*_GCC5_IA32_DLINK2_FLAGS         = DEF(GCC5_IA32_DLINK2_FLAGS)

+*_GCC5_IA32_RC_FLAGS             = DEF(GCC_IA32_RC_FLAGS)

+*_GCC5_IA32_OBJCOPY_FLAGS        =

+*_GCC5_IA32_NASM_FLAGS           = -f elf32

+

+  DEBUG_GCC5_IA32_CC_FLAGS       = DEF(GCC5_IA32_CC_FLAGS) -Os

+RELEASE_GCC5_IA32_CC_FLAGS       = DEF(GCC5_IA32_CC_FLAGS) -Os -Wno-unused-but-set-variable

+

+##################

+# GCC5 X64 definitions

+##################

+*_GCC5_X64_OBJCOPY_PATH          = DEF(GCC5_X64_PREFIX)objcopy

+*_GCC5_X64_CC_PATH               = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_SLINK_PATH            = DEF(GCC5_X64_PREFIX)gcc-ar

+*_GCC5_X64_DLINK_PATH            = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_ASLDLINK_PATH         = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_ASM_PATH              = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_PP_PATH               = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_VFRPP_PATH            = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_ASLCC_PATH            = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_ASLPP_PATH            = DEF(GCC5_X64_PREFIX)gcc

+*_GCC5_X64_RC_PATH               = DEF(GCC5_X64_PREFIX)objcopy

+

+*_GCC5_X64_ASLCC_FLAGS           = DEF(GCC_ASLCC_FLAGS) -m64 -fno-lto

+*_GCC5_X64_ASLDLINK_FLAGS        = DEF(GCC5_IA32_X64_ASLDLINK_FLAGS) -Wl,-m,elf_x86_64

+*_GCC5_X64_ASM_FLAGS             = DEF(GCC5_ASM_FLAGS) -m64

+*_GCC5_X64_DLINK_FLAGS           = DEF(GCC5_X64_DLINK_FLAGS) -Os

+*_GCC5_X64_DLINK2_FLAGS          = DEF(GCC5_X64_DLINK2_FLAGS)

+*_GCC5_X64_RC_FLAGS              = DEF(GCC_X64_RC_FLAGS)

+*_GCC5_X64_OBJCOPY_FLAGS         =

+*_GCC5_X64_NASM_FLAGS            = -f elf64

+

+  DEBUG_GCC5_X64_CC_FLAGS        = DEF(GCC5_X64_CC_FLAGS)

+RELEASE_GCC5_X64_CC_FLAGS        = DEF(GCC5_X64_CC_FLAGS) -Wno-unused-but-set-variable

+

+##################

+# GCC5 ARM definitions

+##################

+*_GCC5_ARM_CC_PATH               = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_SLINK_PATH            = ENV(GCC5_ARM_PREFIX)gcc-ar

+*_GCC5_ARM_DLINK_PATH            = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_ASLDLINK_PATH         = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_ASM_PATH              = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_PP_PATH               = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_VFRPP_PATH            = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_ASLCC_PATH            = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_ASLPP_PATH            = ENV(GCC5_ARM_PREFIX)gcc

+*_GCC5_ARM_RC_PATH               = ENV(GCC5_ARM_PREFIX)objcopy

+

+*_GCC5_ARM_ARCHCC_FLAGS          = -mthumb

+*_GCC5_ARM_ASLCC_FLAGS           = DEF(GCC_ASLCC_FLAGS)

+*_GCC5_ARM_ASLDLINK_FLAGS        = DEF(GCC5_ARM_ASLDLINK_FLAGS)

+*_GCC5_ARM_ASM_FLAGS             = DEF(GCC5_ARM_ASM_FLAGS)

+*_GCC5_ARM_DLINK2_FLAGS          = DEF(GCC5_ARM_DLINK2_FLAGS)

+*_GCC5_ARM_PLATFORM_FLAGS        = -march=armv7-a

+*_GCC5_ARM_PP_FLAGS              = $(ARCHCC_FLAGS) $(PLATFORM_FLAGS) DEF(GCC_PP_FLAGS)

+*_GCC5_ARM_RC_FLAGS              = DEF(GCC_ARM_RC_FLAGS)

+*_GCC5_ARM_VFRPP_FLAGS           = $(ARCHCC_FLAGS) $(PLATFORM_FLAGS) DEF(GCC_VFRPP_FLAGS)

+

+  DEBUG_GCC5_ARM_CC_FLAGS        = DEF(GCC5_ARM_CC_FLAGS) -O0

+  DEBUG_GCC5_ARM_DLINK_FLAGS     = DEF(GCC5_ARM_DLINK_FLAGS)

+

+RELEASE_GCC5_ARM_CC_FLAGS        = DEF(GCC5_ARM_CC_FLAGS) -flto -Wno-unused-but-set-variable

+RELEASE_GCC5_ARM_DLINK_FLAGS     = DEF(GCC5_ARM_DLINK_FLAGS) -flto -Os -L$(WORKSPACE)/ArmPkg/Library/GccLto -llto-arm -Wl,-plugin-opt=-pass-through=-llto-arm

+

+##################

+# GCC5 AARCH64 definitions

+##################

+*_GCC5_AARCH64_CC_PATH           = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_SLINK_PATH        = ENV(GCC5_AARCH64_PREFIX)gcc-ar

+*_GCC5_AARCH64_DLINK_PATH        = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_ASLDLINK_PATH     = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_ASM_PATH          = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_PP_PATH           = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_VFRPP_PATH        = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_ASLCC_PATH        = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_ASLPP_PATH        = ENV(GCC5_AARCH64_PREFIX)gcc

+*_GCC5_AARCH64_RC_PATH           = ENV(GCC5_AARCH64_PREFIX)objcopy

+

+*_GCC5_AARCH64_ASLCC_FLAGS       = DEF(GCC_ASLCC_FLAGS)

+*_GCC5_AARCH64_ASLDLINK_FLAGS    = DEF(GCC5_AARCH64_ASLDLINK_FLAGS)

+*_GCC5_AARCH64_ASM_FLAGS         = DEF(GCC5_AARCH64_ASM_FLAGS)

+*_GCC5_AARCH64_DLINK2_FLAGS      = DEF(GCC5_AARCH64_DLINK2_FLAGS)

+*_GCC5_AARCH64_PLATFORM_FLAGS    =

+*_GCC5_AARCH64_PP_FLAGS          = $(ARCHCC_FLAGS) $(PLATFORM_FLAGS) DEF(GCC_PP_FLAGS)

+*_GCC5_AARCH64_RC_FLAGS          = DEF(GCC_AARCH64_RC_FLAGS)

+*_GCC5_AARCH64_VFRPP_FLAGS       = $(ARCHCC_FLAGS) $(PLATFORM_FLAGS) DEF(GCC_VFRPP_FLAGS)

+*_GCC5_AARCH64_CC_XIPFLAGS       = DEF(GCC5_AARCH64_CC_XIPFLAGS)

+

+  DEBUG_GCC5_AARCH64_CC_FLAGS    = DEF(GCC5_AARCH64_CC_FLAGS) -O0 -mcmodel=small

+  DEBUG_GCC5_AARCH64_DLINK_FLAGS = DEF(GCC5_AARCH64_DLINK_FLAGS) -z common-page-size=0x1000

+

+RELEASE_GCC5_AARCH64_CC_FLAGS    = DEF(GCC5_AARCH64_CC_FLAGS) -flto -Wno-unused-but-set-variable -mcmodel=tiny

+RELEASE_GCC5_AARCH64_DLINK_FLAGS = DEF(GCC5_AARCH64_DLINK_FLAGS) -flto -Os -L$(WORKSPACE)/ArmPkg/Library/GccLto -llto-aarch64 -Wl,-plugin-opt=-pass-through=-llto-aarch64

+

+####################################################################################

+#

 # CLANG35   - This configuration is used to compile under Linux to produce

 #             PE/COFF binaries using the clang compiler and assembler (v3.5 and up)

 #             and GNU linker

diff --git a/MdePkg/Include/X64/ProcessorBind.h b/MdePkg/Include/X64/ProcessorBind.h
index 666cc8e8bd..ffcf2b0344 100644
--- a/MdePkg/Include/X64/ProcessorBind.h
+++ b/MdePkg/Include/X64/ProcessorBind.h
@@ -27,13 +27,17 @@
 #pragma pack()

 #endif

 

-#if defined(__GNUC__) && defined(__pic__)

+#if defined(__GNUC__) && defined(__pic__) && !defined(USING_LTO)

 //

 // Mark all symbol declarations and references as hidden, meaning they will

 // not be subject to symbol preemption. This allows the compiler to refer to

 // symbols directly using relative references rather than via the GOT, which

 // contains absolute symbol addresses that are subject to runtime relocation.

 //

+// The LTO linker will not emit GOT based relocations when all symbol

+// references can be resolved locally, and so there is no need to set the

+// pragma in that case (and doing so will cause other issues).

+//

 #pragma GCC visibility push (hidden)

 #endif