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Fix shared lib build with NAG Fortran on macOS #5824

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Fix shared lib build with NAG Fortran on macOS #5824

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37 changes: 34 additions & 3 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -263,6 +263,14 @@ if(APPLE)
if(NOT NOFORTRAN)
set(CMAKE_Fortran_USE_RESPONSE_FILE_FOR_OBJECTS ON)
set(CMAKE_Fortran_USE_RESPONSE_FILE_FOR_LIBRARIES ON)
# NAG Fortran does not support the GCC-specific -x f95-cpp-input flag
# used in the shared library link rule below. Override
# CMAKE_Fortran_CREATE_SHARED_LIBRARY early (before targets are defined)
# to use the C compiler link rule instead; the shared library contains
# only C and assembler objects so this is safe.
if(CMAKE_Fortran_COMPILER_ID MATCHES "NAG")
set(CMAKE_Fortran_CREATE_SHARED_LIBRARY ${CMAKE_C_CREATE_SHARED_LIBRARY})
endif()
endif()
set(CMAKE_NINJA_FORCE_RESPONSE_FILE ON)
endif()
Expand Down Expand Up @@ -360,9 +368,32 @@ if(APPLE AND BUILD_STATIC_LIBS)
if(NOT NOFORTRAN)
set(CMAKE_Fortran_CREATE_STATIC_LIBRARY ${CREATE_STATIC_LIBRARY_COMMAND})
if(BUILD_SHARED_LIBS)
set(CMAKE_Fortran_CREATE_SHARED_LIBRARY
"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,${STATIC_PATH} dummy.o -o ${SHARED_PATH} ${OMP_LIB}'")
if(CMAKE_Fortran_COMPILER_ID MATCHES "GNU")
set(CMAKE_Fortran_CREATE_SHARED_LIBRARY
"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,${STATIC_PATH} dummy.o -o ${SHARED_PATH} ${OMP_LIB}'")
elseif(CMAKE_Fortran_COMPILER_ID MATCHES "NAG")
# NAG does not support -x f95-cpp-input, and macOS needs -dynamiclib
# rather than -Wl,-shared. Use the C compiler as the linker driver
# and add the NAG Fortran runtime so NAGf90_* symbols resolve.
# Locate the NAG Fortran runtime (libf<XY>rts) without hardcoding the
# version digits: NAG 7.1 ships libf71rts, 7.2 ships libf72rts, etc.
get_filename_component(_NAG_FC_DIR "${CMAKE_Fortran_COMPILER}" DIRECTORY)
set(_NAG_RTS_DIR "${_NAG_FC_DIR}/../lib/NAG_Fortran")
file(GLOB _NAG_RTS_CANDIDATES
"${_NAG_RTS_DIR}/libf*rts.dylib"
"${_NAG_RTS_DIR}/libf*rts.a")
if(_NAG_RTS_CANDIDATES)
list(GET _NAG_RTS_CANDIDATES 0 _NAG_RTS_LIB)
get_filename_component(_NAG_RTS_NAME "${_NAG_RTS_LIB}" NAME_WE)
string(REGEX REPLACE "^lib" "" _NAG_RTS_LIBNAME "${_NAG_RTS_NAME}")
set(_NAG_RTS_FLAGS "-L${_NAG_RTS_DIR} -l${_NAG_RTS_LIBNAME}")
else()
set(_NAG_RTS_FLAGS "")
endif()
set(CMAKE_Fortran_CREATE_SHARED_LIBRARY
"sh -c '${CMAKE_C_COMPILER} -dynamiclib -Wl,-all_load -Wl,-force_load,${STATIC_PATH} -o ${SHARED_PATH} ${OMP_LIB} ${_NAG_RTS_FLAGS}'")
endif()
endif()
else()
set(CMAKE_C_CREATE_STATIC_LIBRARY ${CREATE_STATIC_LIBRARY_COMMAND})
Expand Down
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