chore(ci): use 4 threads to compile on GHA (#449)

Author: mayeut

CMakeLists.txt

@@ -286,10 +286,15 @@ set(CMAKE_EXE_LINKER_FLAGS \"-lstdc++ -lgcc -lrt\" CACHE STRING \"Initial cache\
         endif()
 
         if(RUN_CMAKE_TEST)
+          include(ProcessorCount)
+          ProcessorCount(NB_CPU)
+          if(NB_CPU EQUAL 0)
+            set(NB_CPU 2)
+          endif()
           ExternalProject_Add_Step(CMakeProject-build run_cmake_test_suite
             DEPENDEES ${CMAKEPROJECT_BUILD_LAST_STEP}
             COMMENT "Running CMake test suite, exclusion list: '${RUN_CMAKE_TEST_EXCLUDE}'"
-            COMMAND ./bin/ctest --force-new-ctest-process --stop-on-failure --output-on-failure -j2 -E ${RUN_CMAKE_TEST_EXCLUDE}
+            COMMAND ./bin/ctest --force-new-ctest-process --stop-on-failure --output-on-failure -j${NB_CPU} -E ${RUN_CMAKE_TEST_EXCLUDE}
             WORKING_DIRECTORY ${CMakeProject_BINARY_DIR}
             USES_TERMINAL 1
             )

pyproject.toml

@@ -31,24 +31,24 @@ before-all = [
     'ninja --version',
     './scripts/manylinux-build-and-install-openssl.sh',
 ]
-environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=2;link=1 -DCMAKE_CXX_STANDARD:STRING=11" }
+environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=4;link=1 -DCMAKE_CXX_STANDARD:STRING=11" }
 
 [[tool.cibuildwheel.overrides]]
 select = ["*-manylinux_aarch64", "*-manylinux_ppc64le", "*-manylinux_s390x"]
 # disable tests on those platforms, QEMU is taking to long for jobs to pass on GHA
-environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=2;link=1 -DCMAKE_CXX_STANDARD:STRING=11 -DRUN_CMAKE_TEST:BOOL=OFF" }
+environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=4;link=1 -DCMAKE_CXX_STANDARD:STRING=11 -DRUN_CMAKE_TEST:BOOL=OFF" }
 
 [[tool.cibuildwheel.overrides]]
 select = ["*-musllinux_x86_64", "*-musllinux_i686"]
 # disable some tests
 # - BootstrapTest fails with custom OpenSSL and probably does not make much sense for this project
 # - ExportImport|RunCMake.install|RunCMake.file-GET_RUNTIME_DEPENDENCIES: c.f. https://discourse.cmake.org/t/cmake-test-suite-failing-on-alpine-linux/5064
-environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=2;link=1 -DRUN_CMAKE_TEST_EXCLUDE:STRING='BootstrapTest|ExportImport|RunCMake.install|RunCMake.file-GET_RUNTIME_DEPENDENCIES'" }
+environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=4;link=1 -DRUN_CMAKE_TEST_EXCLUDE:STRING='BootstrapTest|ExportImport|RunCMake.install|RunCMake.file-GET_RUNTIME_DEPENDENCIES'" }
 
 [[tool.cibuildwheel.overrides]]
 select = ["*-musllinux_aarch64", "*-musllinux_ppc64le", "*-musllinux_s390x"]
 # disable tests on those platforms, QEMU is taking to long for jobs to pass on GHA
-environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=2;link=1 -DRUN_CMAKE_TEST:BOOL=OFF" }
+environment = { SKBUILD_CONFIGURE_OPTIONS = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl -DCMAKE_JOB_POOL_COMPILE:STRING=compile -DCMAKE_JOB_POOL_LINK:STRING=link -DCMAKE_JOB_POOLS:STRING=compile=4;link=1 -DRUN_CMAKE_TEST:BOOL=OFF" }
 
 [tool.cibuildwheel.macos.environment]
 MACOSX_DEPLOYMENT_TARGET = "10.10"