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Only enable LTO for some archs

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Sylvestre Ledru 2022-10-11 09:16:43 +02:00
parent 0988deb2e8
commit a235abc1ef
2 changed files with 16 additions and 9 deletions
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6
debian/changelog vendored
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@ -1,3 +1,9 @@
llvm-toolchain-15 (1:15.0.2-2~exp5) experimental; urgency=medium
* Only enable LTO for some archs
-- Sylvestre Ledru <sylvestre@debian.org> Tue, 11 Oct 2022 09:15:56 +0200
llvm-toolchain-15 (1:15.0.2-2~exp4) experimental; urgency=medium llvm-toolchain-15 (1:15.0.2-2~exp4) experimental; urgency=medium
* Only ship libbolt_rt_hugify.a & libbolt_rt_instr.a on amd64 * Only ship libbolt_rt_hugify.a & libbolt_rt_instr.a on amd64

19
debian/rules vendored
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@ -395,17 +395,15 @@ ifneq (,$(filter $(DEB_HOST_ARCH_OS),linux))
STAGE_2_CMAKE_EXTRA += -DLLVM_USE_PERF=ON -DLLVM_ENABLE_LIBPFM=ON STAGE_2_CMAKE_EXTRA += -DLLVM_USE_PERF=ON -DLLVM_ENABLE_LIBPFM=ON
endif endif
LTO_ENABLE=no
# Only enable it for archs supporting gold # Only enable it for archs supporting gold
ifneq (,$(filter $(DEB_HOST_ARCH),$(BINUTILS_GOLD_ARCHS))) ifneq (,$(filter $(DEB_HOST_ARCH),$(BINUTILS_GOLD_ARCHS)))
# armhf is not yet quite ready for Thin, it FTBFS # LTO requires a bunch of memory. Don't do it everywhere
# see https://buildd.debian.org/status/fetch.php?pkg=llvm-toolchain-8&arch=armhf&ver=1%3A8.0.1%7E%2Brc2-1%7Eexp1&stamp=1560334266&raw=0 LTO_DISABLE_ARCHS := i386 armhf s390x ppc64 x32
ifeq (,$(filter $(DEB_HOST_ARCH), armhf)) ifeq (,$(filter-out $(LTO_DISABLE_ARCHS), $(DEB_HOST_ARCH)))
# Use BOOTSTRAP_LLVM_ENABLE_LTO to make sure that it isn't used LTO_ENABLE=no
# when running stage1 with gcc else
# For now, disable ThinLTO usage because: LTO_ENABLE=yes
# * LLVM_ENABLE_LTO doesn't work with gcc >= 9 (option not accepted)
# * BOOTSTRAP_LLVM_ENABLE_LTO is producing some large binary
# See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=943623
STAGE_2_CMAKE_EXTRA += -DLLVM_ENABLE_LTO="On" STAGE_2_CMAKE_EXTRA += -DLLVM_ENABLE_LTO="On"
endif endif
endif endif
@ -477,6 +475,7 @@ preconfigure:
@echo "PATH=$(PATH)" @echo "PATH=$(PATH)"
@echo "LD_LIBRARY_PATH=$(LD_LIBRARY_PATH)" @echo "LD_LIBRARY_PATH=$(LD_LIBRARY_PATH)"
@echo "LIBFUZZER_ENABLE=$(LIBFUZZER_ENABLE)" @echo "LIBFUZZER_ENABLE=$(LIBFUZZER_ENABLE)"
@echo "LTO_ENABLE=$(LTO_ENABLE)"
@echo "COMPILER_RT_WASM_ENABLE=$(COMPILER_RT_WASM_ENABLE)" @echo "COMPILER_RT_WASM_ENABLE=$(COMPILER_RT_WASM_ENABLE)"
for f in debian/*.in; do \ for f in debian/*.in; do \
@ -822,8 +821,10 @@ override_dh_auto_install:
# Clean up temporary files to make sure the install works # Clean up temporary files to make sure the install works
rm -rf $(find $(TARGET_BUILD) -wholename '*CMakeFiles*' -not -name CMakeLists.txt -a -name "*.dir" -type d) rm -rf $(find $(TARGET_BUILD) -wholename '*CMakeFiles*' -not -name CMakeLists.txt -a -name "*.dir" -type d)
ifeq (${LTO_ENABLE},yes)
# with LTO, .a contains llvm ir instead of native code. So, recompile them # with LTO, .a contains llvm ir instead of native code. So, recompile them
NJOBS="$(NJOBS)" P_TO_LLVM="$(CURDIR)" VERSION=$(LLVM_VERSION) bash debian/llvm-compile-lto-elf.sh $(CXXFLAGS_EXTRA) NJOBS="$(NJOBS)" P_TO_LLVM="$(CURDIR)" VERSION=$(LLVM_VERSION) bash debian/llvm-compile-lto-elf.sh $(CXXFLAGS_EXTRA)
endif
# install/fast enables a make install without recompiling temporary files # install/fast enables a make install without recompiling temporary files
LD_LIBRARY_PATH=$(STAGE_2_LIB_DIR):$$LD_LIBRARY_PATH DESTDIR=$(DEB_INST)/ ninja -C $(TARGET_BUILD) $(VERBOSE) stage2-install LD_LIBRARY_PATH=$(STAGE_2_LIB_DIR):$$LD_LIBRARY_PATH DESTDIR=$(DEB_INST)/ ninja -C $(TARGET_BUILD) $(VERBOSE) stage2-install