[LLVMdev] Clang 3.5 Release Pre-Pre-Pre-Announcement

[Jack Howarth]

Bill,
     I have the openmp support in llvm 3.5svn now built on 10.7 using Xcode
4.6.3 and 10.8/10.9 using 5.1.1. The 10.7 build required the hack…

perl -pi -e 's|list\(APPEND SANITIZER_COMMON_SUPPORTED_DARWIN_OS
iossim\)||g' projects/compiler-rt/CMakeLists.txt

to suppress building libclang_rt.asan_iossim_dynamic.dylib. The compiler-rt
build now expects the iPhoneSimulator7.0.0.sdk but Xcode 4.6.3 only has the
/iPhoneSimulator6.1.sdk. I tried tweaking that back to 6.1 but the build of
llibclang_rt.asan_iossim_dynamic.dylib. wants link to a copy of
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk/usr/lib/libc++.dylib
as a x86_64 binary but it only exists as i386.
          Jack
ps The previous report of omp_workshare2.c example failing to compile can
be ignored as that was a stray character in my copy.

On Sun, May 18, 2014 at 3:31 PM, Jack Howarth <
howarth.mailing.lists at gmail.com> wrote:

>    It appears that the failure in the openmp build is due to a race
> condition as if I use…
>
> make -j1 compiler=clang
>
> the failure in building openmp on my 10.8 box disappears.
>
>
>
> On Sun, May 18, 2014 at 1:36 PM, Jack Howarth <
> howarth.mailing.lists at gmail.com> wrote:
>
>> Bill,
>>      Are there any plans to integrate the new openmp support into the
>> llvm/clang 3.5 build process? I have been able to build the current
>> llvm/clang/compiler-rt/openmp svn on Mac OS X 10.9 out of tree with…
>>
>>         pushd projects/openmp/runtime
>>         make compiler=clang
>>         popd
>>
>> and then
>>
>>         OPENMP_DIR=`ls projects/openmp/runtime/tmp | grep dyn`
>>         pushd projects/openmp/runtime/tmp/$OPENMP_DIR
>>         install -m 755 libiomp5.dylib %i/opt/llvm-%v/lib/libgomp.dylib
>>         install -m 644 *.h %i/opt/llvm-%v/lib/clang/%v/include
>>         popd
>>
>> in our fink llvm packaging.
>>     It would be nice to see the cmake build machinery updated to
>> automatically build and install openmp if its sources are placed in the
>> projects subdirectory of the llvm-3.5.0 source directory. Even if there
>> isn't cmake build integration, but assuming an openmp 3.5.0 tar ball will
>> be released for llvm/clang 3.5.0, the flag for openmp support needs to be
>> synced to the library name generated in openmp. Currently, the clang flag
>> -fopenmp flag emits -lgomp whereas the openmp svn currently produces a
>> libiomp5.dylib instead. Also, the clang compiler currently has to be passed
>> an explicitly library path to the location of the libgomp.dylib with -L.
>> While the openmp headers can be found by clang when placed in clang's
>> include directory, the libgomp.dylib shared lib isn't found when placed in
>> any of the llvm/clang internal lib directories. If the file is going to be
>> renamed as libgomp.dylib, it should be buried in the llvm/clang directories
>> so that it doesn't collide with the FSF one. I can see the rational of
>> using libgomp.dylib, so that configure and cmake detection of openmp is
>> triggered, but in the long run it probably should be using a different
>> shared library name.
>>             Jack
>> ps I found on 10.9, that current llvm/clang/openmp can compile and run
>> all of the example code at
>> https://computing.llnl.gov/tutorials/openMP/exercise.html to build
>> except for omp_workshare2.c<https://computing.llnl.gov/tutorials/openMP/samples/C/omp_workshare2.c>.
>> FYI, there appears to be an issue with building current openmp on 10.8
>> using the same approach. The openmp code appears to compile but the build
>> fails with…
>>
>> make[1]: Leaving directory
>> '/sw/src/fink.build/llvm35-3.5.0-0/llvm-3.5.0/projects/openmp/runtime/tmp/mac_32e-rtl_5_nor_dyn.12.rel.40.c0.t0-prrg4'
>>
>> -------------------------------------------------------------------------------
>> Finished  : 2014-05-17 01:49:01 UTC
>> Elapsed   : 00:00:02
>> Result    : --- Failure ---
>>
>> -------------------------------------------------------------------------------
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140518/b101e780/attachment.html>