Hi CMake Mailing List,
I am using the CHECK_CXX_COMPILER_FLAG directive in a CMake file to detect
whether the compiler uses the "-fsanitize=address" compiler flag. I'm using the
g++ 7.3.0 compiler which supports this flag but the CHECK_CXX_COMPILER_FLAG
directive incorrectly determines that this flag is not supported.
To test this I tried compiling the following program:
int main() {};
This compiled with the following commands:
> g++ -fsanitize=address -c test.cpp
> g++ -fsanitize=address test.o -o test.exe
And fails with the same error message as CHECK_CXX_COMPILER_FLAG when I compile
with:
> g++ -fsanitize=address -c test.cpp
> g++ test.o -o test.exe
producing the following message:
Undefined symbols for architecture x86_64:
"___asan_init", referenced from:
__GLOBAL__sub_I_00099_0_test.cpp in test.o
"___asan_version_mismatch_check_v8", referenced from:
__GLOBAL__sub_I_00099_0_test.cpp in test.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
It seems that CHECK_CXX_COMPILER_FLAG doesn't add the flag to the linking
command when it tests compilation. Is this a bug with CHECK_CXX_COMPILER_FLAG
or is there something I'm missing?
Many thanks
Adrian Turner
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