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BaseTools/tools_def CLANGDWARF: Always use -Oz in RELEASE mode 

GCC5 and CLANGDWARF for IA32/X64 use -Os or -Oz as the optimization
level, which agressively optimizes for the smallest possible object
code.

On AARCH64, RISCV64 and ARM, we use -O3 instead, which results in
considerable image bloat, to the point where the Raspberry Pi 4 build in
edk2-platforms does not even build with -D SECURE_BOOT_ENABLE.

So let's align CLANGDWARF across all architectures, and use -Oz
throughout.

Note that O3 is still used for the linker, which build in LTO mode and
therefore performs some code generation as well. This is deliberate: LLD
does not support the Os/Oz optimization levels at all, and using Oz for
the compile pass is sufficient to reduce the code size substantially.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2024-07-28 18:50:09 +02:00 committed by mergify[bot]
parent b7f963d570
commit ecb1d67775
1 changed files with 3 additions and 3 deletions
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6
BaseTools/Conf/tools_def.template
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@ -2130,7 +2130,7 @@ DEFINE CLANGDWARF_ARM_DLINK_FLAGS = DEF(CLANGDWARF_ARM_TARGET) DEF(GCC_ARM_DLI
DEBUG_CLANGDWARF_ARM_DLINK_FLAGS = DEF(CLANGDWARF_ARM_DLINK_FLAGS) -flto -Wl,-O1 -fuse-ld=lld -L$(WORKSPACE)/BaseTools/Bin/GccLto -llto-arm -Wl,-plugin-opt=-pass-through=-llto-arm -Wl,--no-pie,--no-relax
NOOPT_CLANGDWARF_ARM_CC_FLAGS = DEF(CLANGDWARF_ARM_CC_FLAGS) $(PLATFORM_FLAGS) -O0
NOOPT_CLANGDWARF_ARM_DLINK_FLAGS = DEF(CLANGDWARF_ARM_DLINK_FLAGS) -fuse-ld=lld -Wl,--no-pie,--no-relax
RELEASE_CLANGDWARF_ARM_CC_FLAGS = DEF(CLANGDWARF_ARM_CC_FLAGS) $(PLATFORM_FLAGS) -flto -O3
RELEASE_CLANGDWARF_ARM_CC_FLAGS = DEF(CLANGDWARF_ARM_CC_FLAGS) $(PLATFORM_FLAGS) -flto -Oz
RELEASE_CLANGDWARF_ARM_DLINK_FLAGS = DEF(CLANGDWARF_ARM_DLINK_FLAGS) -flto -Wl,-O3 -fuse-ld=lld -L$(WORKSPACE)/BaseTools/Bin/GccLto -llto-arm -Wl,-plugin-opt=-pass-through=-llto-arm -Wl,--no-pie,--no-relax
##################
@ -2176,7 +2176,7 @@ DEFINE CLANGDWARF_AARCH64_DLINK_FLAGS = DEF(CLANGDWARF_AARCH64_TARGET) DEF(GCC_
DEBUG_CLANGDWARF_AARCH64_DLINK_FLAGS = DEF(CLANGDWARF_AARCH64_DLINK_FLAGS) -flto -Wl,-O1 -fuse-ld=lld -L$(WORKSPACE)/BaseTools/Bin/GccLto -llto-aarch64 -Wl,-plugin-opt=-pass-through=-llto-aarch64 -Wl,--no-pie,--no-relax
NOOPT_CLANGDWARF_AARCH64_CC_FLAGS = DEF(CLANGDWARF_AARCH64_CC_FLAGS) $(PLATFORM_FLAGS) -O0
NOOPT_CLANGDWARF_AARCH64_DLINK_FLAGS = DEF(CLANGDWARF_AARCH64_DLINK_FLAGS) -fuse-ld=lld -Wl,--no-pie,--no-relax
RELEASE_CLANGDWARF_AARCH64_CC_FLAGS = DEF(CLANGDWARF_AARCH64_CC_FLAGS) $(PLATFORM_FLAGS) -flto -O3
RELEASE_CLANGDWARF_AARCH64_CC_FLAGS = DEF(CLANGDWARF_AARCH64_CC_FLAGS) $(PLATFORM_FLAGS) -flto -Oz
RELEASE_CLANGDWARF_AARCH64_DLINK_FLAGS = DEF(CLANGDWARF_AARCH64_DLINK_FLAGS) -flto -Wl,-O3 -fuse-ld=lld -L$(WORKSPACE)/BaseTools/Bin/GccLto -llto-aarch64 -Wl,-plugin-opt=-pass-through=-llto-aarch64 -Wl,--no-pie,--no-relax
##################
@ -2228,7 +2228,7 @@ DEFINE CLANGDWARF_RISCV64_DLINK_FLAGS = DEF(CLANGDWARF_RISCV64_TARGET) DEF
DEBUG_CLANGDWARF_RISCV64_DLINK_FLAGS = DEF(CLANGDWARF_RISCV64_DLINK_FLAGS) -flto -Wl,-O1 -fuse-ld=lld -Wl,--no-pie,--no-relax
NOOPT_CLANGDWARF_RISCV64_CC_FLAGS = DEF(CLANGDWARF_RISCV64_CC_FLAGS) $(PLATFORM_FLAGS) -O0
NOOPT_CLANGDWARF_RISCV64_DLINK_FLAGS = DEF(CLANGDWARF_RISCV64_DLINK_FLAGS) -fuse-ld=lld -Wl,--no-pie,--no-relax
RELEASE_CLANGDWARF_RISCV64_CC_FLAGS = DEF(CLANGDWARF_RISCV64_CC_FLAGS) $(PLATFORM_FLAGS) -flto -O3
RELEASE_CLANGDWARF_RISCV64_CC_FLAGS = DEF(CLANGDWARF_RISCV64_CC_FLAGS) $(PLATFORM_FLAGS) -flto -Oz
RELEASE_CLANGDWARF_RISCV64_DLINK_FLAGS = DEF(CLANGDWARF_RISCV64_DLINK_FLAGS) -flto -Wl,-O3 -fuse-ld=lld -Wl,--no-pie,--no-relax
#