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/20140518/0d0f2c7e/attachment.html>
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/aa6355f6/attachment.html>
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>
Reasonably Related Threads
- [LLVMdev] Clang 3.5 Release Pre-Pre-Pre-Announcement
- [LLVMdev] [Openmp-dev] OpenMP 3.1 Implementation Complete
- [LLVMdev] [Openmp-dev] OpenMP 3.1 Implementation Complete
- [LLVMdev] libiomp, not libgomp as default library linked with -fopenmp
- [LLVMdev] libiomp, not libgomp as default library linked with -fopenmp