Description: Explicitly target generic x86-64 ABI
 The system compiler may be configured to target a higher x86-64 psABI by
 default, so explicitly target the generic psABI to retain compatibility
 with older machine types.
Author: dann frazier <dannf@debian.org>
Bug-Ubuntu: http://launchpad.net/bugs/1976267
Forwarded: https://edk2.groups.io/g/devel/message/90447
Last-Update: 2024-11-24

--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -962,7 +962,7 @@
 DEFINE GCC48_ALL_CC_FLAGS            = DEF(GCC_ALL_CC_FLAGS) -ffunction-sections -fdata-sections -fno-stack-protector -DSTRING_ARRAY_NAME=$(BASE_NAME)Strings
 DEFINE GCC48_IA32_X64_DLINK_COMMON   = -nostdlib -Wl,-n,-q,--gc-sections -z common-page-size=0x20
 DEFINE GCC48_IA32_CC_FLAGS           = DEF(GCC48_ALL_CC_FLAGS) DEF(GCC_IA32_X64_CC_FLAGS) -m32 -march=i586 -malign-double -D EFI32 -fno-asynchronous-unwind-tables -Wno-address -fno-omit-frame-pointer
-DEFINE GCC48_X64_CC_FLAGS            = DEF(GCC48_ALL_CC_FLAGS) DEF(GCC_IA32_X64_CC_FLAGS) -m64 "-DEFIAPI=__attribute__((ms_abi))" -maccumulate-outgoing-args -mno-red-zone -Wno-address -mcmodel=small -fpie -fno-asynchronous-unwind-tables -Wno-address  -fno-omit-frame-pointer
+DEFINE GCC48_X64_CC_FLAGS            = DEF(GCC48_ALL_CC_FLAGS) DEF(GCC_IA32_X64_CC_FLAGS) -m64 -march=x86-64 "-DEFIAPI=__attribute__((ms_abi))" -maccumulate-outgoing-args -mno-red-zone -Wno-address -mcmodel=small -fpie -fno-asynchronous-unwind-tables -Wno-address  -fno-omit-frame-pointer
 DEFINE GCC48_IA32_X64_ASLDLINK_FLAGS = DEF(GCC48_IA32_X64_DLINK_COMMON) -Wl,--entry,ReferenceAcpiTable -u ReferenceAcpiTable
 DEFINE GCC48_IA32_X64_DLINK_FLAGS    = DEF(GCC48_IA32_X64_DLINK_COMMON) -Wl,--entry,$(IMAGE_ENTRY_POINT) -u $(IMAGE_ENTRY_POINT) -Wl,-Map,$(DEST_DIR_DEBUG)/$(BASE_NAME).map,--whole-archive
 DEFINE GCC48_IA32_DLINK2_FLAGS       = -Wl,--defsym=PECOFF_HEADER_SIZE=0x220 DEF(GCC_DLINK2_FLAGS_COMMON)