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a940cad331
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>
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|---|---|---|
| .. | ||
| .gitignore | ||
| Makefile | ||
| test-all.c | ||
| test-backtrace.c | ||
| test-bionic.c | ||
| test-bpf.c | ||
| test-clang.cpp | ||
| test-compile.c | ||
| test-cplus-demangle.c | ||
| test-cxx.cpp | ||
| test-dwarf_getlocations.c | ||
| test-dwarf.c | ||
| test-fortify-source.c | ||
| test-get_cpuid.c | ||
| test-glibc.c | ||
| test-gtk2-infobar.c | ||
| test-gtk2.c | ||
| test-hello.c | ||
| test-jvmti.c | ||
| test-libaudit.c | ||
| test-libbabeltrace.c | ||
| test-libbfd.c | ||
| test-libcrypto.c | ||
| test-libdw-dwarf-unwind.c | ||
| test-libelf-gelf_getnote.c | ||
| test-libelf-getphdrnum.c | ||
| test-libelf-getshdrstrndx.c | ||
| test-libelf-mmap.c | ||
| test-libelf.c | ||
| test-libnuma.c | ||
| test-libperl.c | ||
| test-libpython-version.c | ||
| test-libpython.c | ||
| test-libslang.c | ||
| test-libunwind-aarch64.c | ||
| test-libunwind-arm.c | ||
| test-libunwind-debug-frame-aarch64.c | ||
| test-libunwind-debug-frame-arm.c | ||
| test-libunwind-debug-frame.c | ||
| test-libunwind-x86_64.c | ||
| test-libunwind-x86.c | ||
| test-libunwind.c | ||
| test-llvm-version.cpp | ||
| test-llvm.cpp | ||
| test-lzma.c | ||
| test-numa_num_possible_cpus.c | ||
| test-pthread-attr-setaffinity-np.c | ||
| test-sdt.c | ||
| test-stackprotector-all.c | ||
| test-sync-compare-and-swap.c | ||
| test-timerfd.c | ||
| test-zlib.c | ||