Fix DYNAMIC_ARCH builds with CMAKE on OSX and add corresponding test to Azure CI (#3409)

* Use linker response files and a custom link command to get around ARG_MAX limitations on OSX
* Reconfigure a redundant job on Azure to test shared library builds with CMAKE and DYNAMIC_ARCH on OSX

CMakeLists.txt

@@ -244,6 +244,22 @@ if(ANDROID)
   endif()
 endif()
 
+if (APPLE AND DYNAMIC_ARCH AND BUILD_SHARED_LIBS)
+  set (CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1)
+  if (NOT NOFORTRAN)  
+  set (CMAKE_Fortran_USE_RESPONSE_FILE_FOR_OBJECTS 1)
+  set (CMAKE_Fortran_CREATE_SHARED_LIBRARY
+ "sh -c 'cat ${CMAKE_BINARY_DIR}/CMakeFiles/openblas_shared.dir/objects*.rsp | xargs -n 1024 ar -ru libopenblas.a && exit 0' "
+ "sh -c 'echo \"\" | ${CMAKE_Fortran_COMPILER} -o dummy.o -c -x f95-cpp-input - '"
+ "sh -c '${CMAKE_Fortran_COMPILER} -fpic -shared -Wl,-all_load -Wl,-force_load,libopenblas.a -Wl,-noall_load dummy.o -o ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libopenblas.${OpenBLAS_MAJOR_VERSION}.${OpenBLAS_MINOR_VERSION}.dylib'"
+ "sh -c 'ls -l ${CMAKE_BINARY_DIR}/lib'")
+  else ()
+  set (CMAKE_C_CREATE_SHARED_LIBRARY
+   "sh -c 'cat ${CMAKE_BINARY_DIR}/CMakeFiles/openblas_shared.dir/objects*.rsp | xargs -n 1024 ar -ru libopenblas.a && exit 0' "
+   "sh -c '${CMAKE_C_COMPILER} -fpic -shared -Wl,-all_load -Wl,-force_load,libopenblas.a -Wl,-noall_load -o ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libopenblas.${OpenBLAS_MAJOR_VERSION}.${OpenBLAS_MINOR_VERSION}.dylib'")
+  endif ()
+endif()
+
 # Handle MSVC exports
 if(MSVC AND BUILD_SHARED_LIBS)
   if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} VERSION_LESS 3.4)

azure-pipelines.yml

@@ -165,7 +165,7 @@ jobs:
       make
       ctest
       
-- job: OSX_OpenMP_Clang_gf_cmake
+- job: OSX_dynarch_cmake
   pool:
      vmImage: 'macOS-10.15'
   variables:
@@ -173,14 +173,12 @@ jobs:
      LIBRARY_PATH: /usr/local/opt/llvm/lib
   steps:   
   - script: |
-      brew update
-      brew install llvm libomp
       mkdir build
       cd build
-      cmake -DTARGET=CORE2 -DUSE_OPENMP=1 -DINTERFACE64=1 -DDYNAMIC_ARCH=1 -DCMAKE_C_COMPILER=/usr/local/opt/llvm/bin/clang -DNO_AVX512=1 ..
-      make
+      cmake -DTARGET=CORE2 -DDYNAMIC_ARCH=1 -DCMAKE_C_COMPILER=gcc-10 -DCMAKE_Fortran_COMPILER=gfortran-10 -DBUILD_SHARED_LIBS=ON ..
+      cmake --build .
       ctest
-        
+      
 - job: OSX_Ifort_Clang
   pool:
      vmImage: 'macOS-10.15'