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add clang LTO compile support

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liyunfei 2023-08-24 16:15:38 +08:00
parent bab172c956
commit ad70eb8406
1 changed files with 23 additions and 1 deletions
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24
kernel.spec
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@ -8,6 +8,12 @@
%global toolchain clang %global toolchain clang
%endif %endif
%bcond_with clang_lto
%if %{with clang_lto} && "%{toolchain}" != "clang"
{error:clang_lto requires --with toolchain_clang}
%endif
%define modsign_cmd %{SOURCE10} %define modsign_cmd %{SOURCE10}
%global Arch $(echo %{_host_cpu} | sed -e s/i.86/x86/ -e s/x86_64/x86/ -e s/aarch64.*/arm64/ -e s/riscv.*/riscv/) %global Arch $(echo %{_host_cpu} | sed -e s/i.86/x86/ -e s/x86_64/x86/ -e s/aarch64.*/arm64/ -e s/riscv.*/riscv/)
@ -19,7 +25,7 @@
%global upstream_sublevel 0 %global upstream_sublevel 0
%global devel_release 1 %global devel_release 1
%global maintenance_release .0.2 %global maintenance_release .0.2
%global pkg_release .8 %global pkg_release .9
%define with_debuginfo 1 %define with_debuginfo 1
# Do not recompute the build-id of vmlinux in find-debuginfo.sh # Do not recompute the build-id of vmlinux in find-debuginfo.sh
@ -132,6 +138,9 @@ BuildRequires: java-devel
BuildRequires: dwarves BuildRequires: dwarves
BuildRequires: clang >= 10.0.0 BuildRequires: clang >= 10.0.0
BuildRequires: llvm BuildRequires: llvm
%if %{with clang_lto}
BuildRequires: lld
%endif
%description %description
The Linux Kernel, the operating system core itself. The Linux Kernel, the operating system core itself.
@ -355,12 +364,22 @@ sed -i arch/arm64/configs/openeuler_defconfig -e 's/^CONFIG_ARM64_VA_BITS_.*/CON
%global clang_make_opts HOSTCC=clang CC=clang LLVM_IAS=%{llvm_ias} %global clang_make_opts HOSTCC=clang CC=clang LLVM_IAS=%{llvm_ias}
%if %{with clang_lto}
%global clang_make_opts %{clang_make_opts} HOSTLD=ld.lld LD=ld.lld AR=llvm-ar NM=llvm-nm HOSTAR=llvm-ar HOSTNM=llvm-nm
%endif
%endif %endif
%global make %{__make} %{?clang_make_opts} HOSTCFLAGS="%{?build_cflags}" HOSTLDFLAGS="%{?build_ldflags}" %global make %{__make} %{?clang_make_opts} HOSTCFLAGS="%{?build_cflags}" HOSTLDFLAGS="%{?build_ldflags}"
%{make} ARCH=%{Arch} openeuler_defconfig %{make} ARCH=%{Arch} openeuler_defconfig
%if %{with clang_lto}
scripts/config -e LTO_CLANG_FULL
sed -i 's/# CONFIG_LTO_CLANG_FULL is not set/CONFIG_LTO_CLANG_FULL=y/' .config
sed -i 's/CONFIG_LTO_NONE=y/# CONFIG_LTO_NONE is not set/' .config
%endif
TargetImage=$(basename $(make -s image_name)) TargetImage=$(basename $(make -s image_name))
%{make} ARCH=%{Arch} $TargetImage %{?_smp_mflags} %{make} ARCH=%{Arch} $TargetImage %{?_smp_mflags}
@ -908,6 +927,9 @@ fi
%endif %endif
%changelog %changelog
* Fri Aug 25 2023 liyunfei <liyunfei33@huawei.com> - 6.4.0-1.0.2.9
- add clang LTO compile support
* Fri Aug 25 2023 liyunfei <liyunfei33@huawei.com> - 6.4.0-1.0.2.8 * Fri Aug 25 2023 liyunfei <liyunfei33@huawei.com> - 6.4.0-1.0.2.8
- add clang toolchain support - add clang toolchain support