On Tue, 17 Aug 2021, 11:35 Isuru Fernando, <isu...@gmail.com> wrote: > Ah, you are using the system python that was built with gcc, but you want > to build sage with clang/clang++. > > In python, setting CC will override the compiler used for building > extension modules, but > it will not override the linker used for building an extension module. > > What happens here is a file is compiled with `-fopenmp` with clang > (meaning it needs to be linked with libomp from LLVM), > but linked with `-fopenmp` with gcc (meaning it links to libgomp from GNU). > > To fix this, you'll have to set env variable LDSHARED="clang -pthread > -shared" >
Thanks, great catch - perhaps we should have this in docs or wiki. > Isuru Fernando > > On Tue, Aug 17, 2021 at 1:52 PM Kazuyoshi Furutaka < > furutaka.kazuyo...@gmail.com> wrote: > >> >> >> 2021年8月17日(火) 17:05 Isuru Fernando <isu...@gmail.com>: >> >>> Did you rebuild python? You might have to do "make distclean". >>> >>> Isuru >>> >>> >> I believe I didn't. >> >> excerpt from the config.log... >> >>> >>> 4360 ## -------------------------------------------------------- ## >>> 4361 ## Checking whether SageMath should install SPKG python3... ## >>> 4362 ## -------------------------------------------------------- ## >>> 4363 configure:33651: checking whether any of bzip2 xz libffi is >>> installed as or will be installed as SPKG >>> 4364 configure:33660: result: no >>> 4365 configure:33664: checking for python3 >= 3.7.0, < 3.10.0 with >>> modules sqlite3, ctypes, math, hashlib, crypt, socket, zlib, distutils.core >>> 4366 configure:34331: result: >>> 4367 configure:34355: checking ... whether /usr/bin/python3 is good >>> 4368 CC=clang CXX=clang++ -std=gnu++11 conftest_venv/bin/python3 >>> conftest.py --verbose build --build-base=conftest.dir >>> 4369 running build >>> 4370 running build_ext >>> 4371 building 'config_check_distutils' extension >>> 4372 creating conftest.dir >>> 4373 creating conftest.dir/temp.linux-x86_64-3.9 >>> 4374 clang -Wno-unused-result -Wsign-compare >>> -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -O2 -fexceptions -g >>> -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOU >>> 4374 RCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -m64 >>> -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection >>> -fcf-protection -D_GNU_SOURCE -fPIC -fwrapv -O >>> 4374 2 -fexceptions -g -grecord-gcc-switches -pipe -Wall >>> -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS >>> -fstack-protector-strong -m64 -mtune=generic -fasyn >>> 4374 chronous-unwind-tables -fstack-clash-protection -fcf-protection >>> -D_GNU_SOURCE -fPIC -fwrapv -O2 -fexceptions -g -grecord-gcc-switches -pipe >>> -Wall -Werror=format-security -Wp,-D_ >>> 4374 FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS >>> -fstack-protector-strong -m64 -mtune=generic -fasynchronous-unwind-tables >>> -fstack-clash-protection -fcf-protection -D_GNU_SOURCE -fPIC >>> 4374 -fwrapv -Dlinux -I/usr/include -fPIC >>> -I/home/furutaka/work/sage/sage-9.4.rc2-git-clang2/conftest_venv/include >>> -I/usr/include/python3.9 -c conftest.c -o conftest.dir/temp.linux- >>> 4374 x86_64-3.9/conftest.o >>> 4375 creating conftest.dir/lib.linux-x86_64-3.9 >>> 4376 gcc -pthread -shared -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -g >>> -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -g -Dlinux -I/usr/include >>> conftest.dir/temp.linux-x86_64-3.9/conftest.o - >>> 4376 L/usr/lib64 -o conftest.dir/lib.linux-x86_64-3.9/ >>> config_check_distutils.cpython-39-x86_64-linux-gnu.so >>> 4377 CC=clang CXX=clang++ -std=gnu++11 conftest_venv/bin/python3 >>> conftest.py --verbose build --build-base=conftest.dir >>> 4378 running build >>> 4379 running build_ext >>> 4380 building 'config_check_distutils_cxx' extension >>> 4381 creating conftest.dir >>> 4382 creating conftest.dir/temp.linux-x86_64-3.9 >>> 4383 clang -Wno-unused-result -Wsign-compare >>> -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -O2 -fexceptions -g >>> -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOU >>> 4383 RCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -m64 >>> -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection >>> -fcf-protection -D_GNU_SOURCE -fPIC -fwrapv -O >>> 4383 2 -fexceptions -g -grecord-gcc-switches -pipe -Wall >>> -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS >>> -fstack-protector-strong -m64 -mtune=generic -fasyn >>> 4383 chronous-unwind-tables -fstack-clash-protection -fcf-protection >>> -D_GNU_SOURCE -fPIC -fwrapv -O2 -fexceptions -g -grecord-gcc-switches -pipe >>> -Wall -Werror=format-security -Wp,-D_ >>> 4383 FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS >>> -fstack-protector-strong -m64 -mtune=generic -fasynchronous-unwind-tables >>> -fstack-clash-protection -fcf-protection -D_GNU_SOURCE -fPIC >>> 4383 -fwrapv -Dlinux -I/usr/include -fPIC >>> -I/home/furutaka/work/sage/sage-9.4.rc2-git-clang2/conftest_venv/include >>> -I/usr/include/python3.9 -c conftest.cpp -o conftest.dir/temp.linu >>> 4383 x-x86_64-3.9/conftest.o -std=c++11 >>> 4384 creating conftest.dir/lib.linux-x86_64-3.9 >>> 4385 clang++ -pthread -shared -Wl,-z,relro -Wl,--as-needed -Wl,-z,now >>> -g -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -g -Dlinux -I/usr/include >>> conftest.dir/temp.linux-x86_64-3.9/conftest 4385 .o -L/usr/lib64 -o >>> conftest.dir/lib.linux-x86_64-3.9/ >>> config_check_distutils_cxx.cpython-39-x86_64-linux-gnu.so >>> 4386 configure:34909: result: yes >>> 4387 configure:34911: checking for python3 >= 3.7.0, < 3.10.0 with >>> modules sqlite3, ctypes, math, hashlib, crypt, socket, zlib, distutils.core >>> 4388 configure:34977: result: /usr/bin/python3 >>> 4389 configure:34994: will use system package and not install SPKG >>> python3 >> >> >> What I did was: >> >> 1. `git checkout -b <a_tagged_version>` >> 2. rsync to a separate directory for building, >> 3. `make configure` >> 4. `CC=clang CXX=clang++ ./configure` >> 5. `./config.status recheck && ./config.status` >> 6. `script -c make make.log` >> >> >> By the way I forgot to mention but it's on a linux running fedora-34 >> (x86_64). >> >> Kazuyoshi >> -- >> Kazuyoshi Furutaka >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sage-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sage-devel+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sage-devel/CANjERveCGS%2Bcqv9yBpDXsAatUw7qBUt3WU4JSqbUEvG2_d%2Bt-A%40mail.gmail.com >> <https://groups.google.com/d/msgid/sage-devel/CANjERveCGS%2Bcqv9yBpDXsAatUw7qBUt3WU4JSqbUEvG2_d%2Bt-A%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/CA%2B01voMt4--cAM%2BUKSQaVz2GGPMb3w%3D_tfnY-pfdJ4AiNZmzQA%40mail.gmail.com > <https://groups.google.com/d/msgid/sage-devel/CA%2B01voMt4--cAM%2BUKSQaVz2GGPMb3w%3D_tfnY-pfdJ4AiNZmzQA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. 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