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| author | Alexey Samsonov <samsonov@google.com> | 2012-10-09 16:03:52 +0000 |
|---|---|---|
| committer | Alexey Samsonov <samsonov@google.com> | 2012-10-09 16:03:52 +0000 |
| commit | f288d223a44fb2fa0de69b225dcdbc5f7669defd (patch) | |
| tree | 296214b50cda8fd59bca7e7ab9f7d20d9ee4b8fc /runtime | |
| parent | 3644d970095d9c638c658cfd17f8e19fc333aadc (diff) | |
| download | clang-f288d223a44fb2fa0de69b225dcdbc5f7669defd.tar.gz clang-f288d223a44fb2fa0de69b225dcdbc5f7669defd.tar.bz2 clang-f288d223a44fb2fa0de69b225dcdbc5f7669defd.tar.xz | |
Fixup for r165097: build 32-bit ASan compiler-rt library on 64-bit Linux only if just-built clang can build simple 32-bit executables
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165503 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'runtime')
| -rw-r--r-- | runtime/compiler-rt/Makefile | 22 | ||||
| -rw-r--r-- | runtime/compiler-rt/clang_linux_test_input.c | 4 |
2 files changed, 23 insertions, 3 deletions
diff --git a/runtime/compiler-rt/Makefile b/runtime/compiler-rt/Makefile index 58cb7fdaaf..0336c01d03 100644 --- a/runtime/compiler-rt/Makefile +++ b/runtime/compiler-rt/Makefile @@ -84,19 +84,35 @@ ifeq ($(OS),Linux) RuntimeDirs += linux RuntimeLibrary.linux.Configs := +# TryCompile compiler source flags +# Returns exit code of running a compiler invocation. +TryCompile = \ + $(shell \ + cflags=""; \ + for flag in $(3); do \ + cflags="$$cflags $$flag"; \ + done; \ + $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \ + echo $$?) + # We currently only try to generate runtime libraries on x86. ifeq ($(ARCH),x86) RuntimeLibrary.linux.Configs += \ full-i386.a profile-i386.a asan-i386.a endif + ifeq ($(ARCH),x86_64) RuntimeLibrary.linux.Configs += \ full-x86_64.a profile-x86_64.a asan-x86_64.a tsan-x86_64.a -# We assume that 32-bit ASan library can be built by Clang on 64-bit platform, -# and add it to the list of runtime libraries so that -# "clang -faddress-sanitizer -m32" would work. +# We need to build 32-bit ASan library on 64-bit platform, and add it to the +# list of runtime libraries to make "clang -faddress-sanitizer -m32" work. +# We check that Clang can produce working 32-bit binaries by compiling a simple +# executable. +test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c +ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0) RuntimeLibrary.linux.Configs += asan-i386.a endif +endif endif diff --git a/runtime/compiler-rt/clang_linux_test_input.c b/runtime/compiler-rt/clang_linux_test_input.c new file mode 100644 index 0000000000..e65ce9860a --- /dev/null +++ b/runtime/compiler-rt/clang_linux_test_input.c @@ -0,0 +1,4 @@ +// This file is used to check if we can produce working executables +// for i386 and x86_64 archs on Linux. +#include <stdlib.h> +int main(){} |