[Openmp-dev] [cfe-dev] Error building openmp 3.1 on clang 3.7

[Jonas Hahnfeld via Openmp-dev]

Hi,

+openmp-dev for discussion about the runtime.

3.7 is quite old, do you see the same problem with 4.0.1? There might be 
some patches in that fixed the build for ARM.

Regards,
Jonas

Am 2017-08-09 19:15, schrieb Marcelo Novaes via cfe-dev:
> Hi all,
> 
> Should I be able to use OpenMP 3.1 using Clang 3.7 on  LLVM 3.7 on an
> ARM board with a Linux 3.10.63+?
> 
> I've built the llvm 3.7 with clang 3.7 successfully, but it didn't
> generate omp dynamic lib. I'm getting an error when I try to do a
> "make" inside of my build/projects/openmp.
> 
> Linking C shared library ../../../../lib/libomp.so
> CMakeFiles/omp.dir/z_Linux_util.c.o: In function
> `__kmp_invoke_microtask':
> z_Linux_util.c:(.text.__kmp_invoke_microtask+0x9e): undefined
> reference to `ffi_prep_cif'
> z_Linux_util.c:(.text.__kmp_invoke_microtask+0xac): undefined
> reference to `ffi_call'
> z_Linux_util.c:(.text.__kmp_invoke_microtask+0xd4): undefined
> reference to `ffi_type_pointer'
> z_Linux_util.c:(.text.__kmp_invoke_microtask+0xd8): undefined
> reference to `ffi_type_void'
> collect2: error: ld returned 1 exit status
> make[2]: *** [lib/libomp.so] Error 1
> 
> However, I have libffi linked, it didn't help.
> 
> I want to generate a dyn lib I can call, I was calling a dyn from my
> gcc, but clang was not able to execute multi thread code compiled with
> the gcc's dynamic lib (it basically ignored the pragmas).
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