diff options
author | Wang Nan <wangnan0@huawei.com> | 2016-12-06 07:22:30 +0000 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-12-06 13:21:55 -0300 |
commit | a940cad331e79cc03d9ae74f56a2c7cb810bdce9 (patch) | |
tree | e39fb10e416d06eaf3b0f674690b58ff1263cb28 /tools/perf/Makefile.config | |
parent | 34c4a42791bbc455e65a15d12dcd0b6b3c52ad13 (diff) | |
download | linux-a940cad331e79cc03d9ae74f56a2c7cb810bdce9.tar.bz2 |
perf build: Check LLVM version in feature check
Cancel builtin llvm and clang support when LLVM version is less than
3.9.0: following commits uses newer API.
Since Clang/LLVM's API is not guaranteed to be stable, add a
test-llvm-version.cpp feature checker, issue warning if LLVM found in
compiling environment is not tested yet.
Committer Notes:
Testing it:
Environment:
$ cat /etc/fedora-release
Fedora release 25 (Twenty Five)
$ rpm -q llvm-devel clang-devel
llvm-devel-3.8.0-1.fc25.x86_64
clang-devel-3.8.0-2.fc25.x86_64
$
Before:
$ make -k LIBCLANGLLVM=1 O=/tmp/build/perf -C tools/perf install-bin
make: Entering directory '/home/acme/git/linux/tools/perf'
BUILD: Doing 'make -j4' parallel build
Warning: tools/include/uapi/linux/bpf.h differs from kernel
Warning: tools/arch/arm/include/uapi/asm/kvm.h differs from kernel
INSTALL GTK UI
LINK /tmp/build/perf/perf
/tmp/build/perf/libperf.a(libperf-in.o): In function `perf::createCompilerInvocation(llvm::SmallVector<char const*, 16u>, llvm::StringRef&, clang::DiagnosticsEngine&)':
/home/acme/git/linux/tools/perf/util/c++/clang.cpp:56: undefined reference to `clang::tooling::newInvocation(clang::DiagnosticsEngine*, llvm::SmallVector<char const*, 16u> const&)'
/tmp/build/perf/libperf.a(libperf-in.o): In function `perf::getModuleFromSource(llvm::SmallVector<char const*, 16u>, llvm::StringRef, llvm::IntrusiveRefCntPtr<clang::vfs::FileSystem>)':
/home/acme/git/linux/tools/perf/util/c++/clang.cpp:68: undefined reference to `clang::CompilerInstance::CompilerInstance(std::shared_ptr<clang::PCHContainerOperations>, bool)'
/home/acme/git/linux/tools/perf/util/c++/clang.cpp:69: undefined reference to `clang::CompilerInstance::createDiagnostics(clang::DiagnosticConsumer*, bool)'
<SNIP>
After:
Makefile.config:807: No suitable libLLVM found, disabling builtin clang and llvm support. Please install llvm-dev(el) (>= 3.9.0)
Updating the environment to a locally built LLVM 4.0 + clang 3.9 (forgot
to git pull, duh) combo, all works as expected, it is properly detected
and built into the resulting perf binary.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Joe Stringer <joe@ovn.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161206072230.7651-1-wangnan0@huawei.com
[ Change the warning message a bit (add 'suitable' and 'builtin'), clarifying it, see committer notes above ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Makefile.config')
-rw-r--r-- | tools/perf/Makefile.config | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 09c2a9874f2f..76c84f0eec52 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -802,12 +802,13 @@ ifdef LIBCLANGLLVM msg := $(warning No g++ found, disable clang and llvm support. Please install g++) else $(call feature_check,llvm) + $(call feature_check,llvm-version) ifneq ($(feature-llvm), 1) - msg := $(warning No libLLVM found, disable clang and llvm support. Please install llvm-dev) + msg := $(warning No suitable libLLVM found, disabling builtin clang and LLVM support. Please install llvm-dev(el) (>= 3.9.0)) else $(call feature_check,clang) ifneq ($(feature-clang), 1) - msg := $(warning No libclang found, disable clang and llvm support. Please install libclang-dev) + msg := $(warning No suitable libclang found, disabling builtin clang and LLVM support. Please install libclang-dev(el) (>= 3.9.0)) else CFLAGS += -DHAVE_LIBCLANGLLVM_SUPPORT CXXFLAGS += -DHAVE_LIBCLANGLLVM_SUPPORT -I$(shell $(LLVM_CONFIG) --includedir) @@ -816,6 +817,9 @@ ifdef LIBCLANGLLVM USE_CXX = 1 USE_LLVM = 1 USE_CLANG = 1 + ifneq ($(feature-llvm-version),1) + msg := $(warning This version of LLVM is not tested. May cause build errors) + endif endif endif endif |