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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
configure_file(${FortranCInterface_SOURCE_DIR}/Input.cmake.in
${FortranCInterface_BINARY_DIR}/Input.cmake @ONLY)
# Detect the Fortran/C interface on the first run or when the
# configuration changes.
if(${FortranCInterface_BINARY_DIR}/Input.cmake
IS_NEWER_THAN ${FortranCInterface_BINARY_DIR}/Output.cmake
OR ${FortranCInterface_SOURCE_DIR}/Output.cmake.in
IS_NEWER_THAN ${FortranCInterface_BINARY_DIR}/Output.cmake
OR ${FortranCInterface_SOURCE_DIR}/CMakeLists.txt
IS_NEWER_THAN ${FortranCInterface_BINARY_DIR}/Output.cmake
OR ${CMAKE_CURRENT_LIST_FILE}
IS_NEWER_THAN ${FortranCInterface_BINARY_DIR}/Output.cmake
)
message(STATUS "Detecting Fortran/C Interface")
else()
return()
endif()
# Invalidate verification results.
unset(FortranCInterface_VERIFIED_C CACHE)
unset(FortranCInterface_VERIFIED_CXX CACHE)
set(_result)
# Build a sample project which reports symbols.
set(CMAKE_TRY_COMPILE_CONFIGURATION Release)
try_compile(FortranCInterface_COMPILED
${FortranCInterface_BINARY_DIR}
${FortranCInterface_SOURCE_DIR}
FortranCInterface # project name
FortranCInterface # target name
CMAKE_FLAGS
"-DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}"
"-DCMAKE_Fortran_FLAGS:STRING=${CMAKE_Fortran_FLAGS}"
"-DCMAKE_C_FLAGS_RELEASE:STRING=${CMAKE_C_FLAGS_RELEASE}"
"-DCMAKE_Fortran_FLAGS_RELEASE:STRING=${CMAKE_Fortran_FLAGS_RELEASE}"
OUTPUT_VARIABLE FortranCInterface_OUTPUT)
set(FortranCInterface_COMPILED ${FortranCInterface_COMPILED})
unset(FortranCInterface_COMPILED CACHE)
# Locate the sample project executable.
if(FortranCInterface_COMPILED)
find_program(FortranCInterface_EXE
NAMES FortranCInterface${CMAKE_EXECUTABLE_SUFFIX}
PATHS ${FortranCInterface_BINARY_DIR} ${FortranCInterface_BINARY_DIR}/Release
NO_DEFAULT_PATH
)
set(FortranCInterface_EXE ${FortranCInterface_EXE})
unset(FortranCInterface_EXE CACHE)
else()
set(_result "Failed to compile")
set(FortranCInterface_EXE)
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Fortran/C interface test project failed with the following output:\n"
"${FortranCInterface_OUTPUT}\n")
endif()
# Load symbols from INFO:symbol[] strings in the executable.
set(FortranCInterface_SYMBOLS)
if(FortranCInterface_EXE)
file(STRINGS "${FortranCInterface_EXE}" _info_strings
LIMIT_COUNT 8 REGEX "INFO:[A-Za-z0-9_]+\\[[^]]*\\]")
foreach(info ${_info_strings})
if("${info}" MATCHES "INFO:symbol\\[([^]]*)\\]")
list(APPEND FortranCInterface_SYMBOLS ${CMAKE_MATCH_1})
endif()
endforeach()
elseif(NOT _result)
set(_result "Failed to load sample executable")
endif()
set(_case_mysub "LOWER")
set(_case_my_sub "LOWER")
set(_case_MYSUB "UPPER")
set(_case_MY_SUB "UPPER")
set(_global_regex "^(_*)(mysub|MYSUB)([_$]*)$")
set(_global__regex "^(_*)(my_sub|MY_SUB)([_$]*)$")
set(_module_regex "^(_*)(mymodule|MYMODULE)([A-Za-z_$]*)(mysub|MYSUB)([_$]*)$")
set(_module__regex "^(_*)(my_module|MY_MODULE)([A-Za-z_$]*)(my_sub|MY_SUB)([_$]*)$")
# Parse the symbol names.
foreach(symbol ${FortranCInterface_SYMBOLS})
foreach(form "" "_")
# Look for global symbols.
string(REGEX REPLACE "${_global_${form}regex}"
"\\1;\\2;\\3" pieces "${symbol}")
list(LENGTH pieces len)
if(len EQUAL 3)
set(FortranCInterface_GLOBAL_${form}SYMBOL "${symbol}")
list(GET pieces 0 FortranCInterface_GLOBAL_${form}PREFIX)
list(GET pieces 1 name)
list(GET pieces 2 FortranCInterface_GLOBAL_${form}SUFFIX)
set(FortranCInterface_GLOBAL_${form}CASE "${_case_${name}}")
endif()
# Look for module symbols.
string(REGEX REPLACE "${_module_${form}regex}"
"\\1;\\2;\\3;\\4;\\5" pieces "${symbol}")
list(LENGTH pieces len)
if(len EQUAL 5)
set(FortranCInterface_MODULE_${form}SYMBOL "${symbol}")
list(GET pieces 0 FortranCInterface_MODULE_${form}PREFIX)
list(GET pieces 1 module)
list(GET pieces 2 FortranCInterface_MODULE_${form}MIDDLE)
list(GET pieces 3 name)
list(GET pieces 4 FortranCInterface_MODULE_${form}SUFFIX)
set(FortranCInterface_MODULE_${form}CASE "${_case_${name}}")
endif()
endforeach()
endforeach()
# Construct mangling macro definitions.
set(_name_LOWER "name")
set(_name_UPPER "NAME")
foreach(form "" "_")
if(FortranCInterface_GLOBAL_${form}SYMBOL)
if(FortranCInterface_GLOBAL_${form}PREFIX)
set(_prefix "${FortranCInterface_GLOBAL_${form}PREFIX}##")
else()
set(_prefix "")
endif()
if(FortranCInterface_GLOBAL_${form}SUFFIX)
set(_suffix "##${FortranCInterface_GLOBAL_${form}SUFFIX}")
else()
set(_suffix "")
endif()
set(_name "${_name_${FortranCInterface_GLOBAL_${form}CASE}}")
set(FortranCInterface_GLOBAL${form}_MACRO
"(name,NAME) ${_prefix}${_name}${_suffix}")
endif()
if(FortranCInterface_MODULE_${form}SYMBOL)
if(FortranCInterface_MODULE_${form}PREFIX)
set(_prefix "${FortranCInterface_MODULE_${form}PREFIX}##")
else()
set(_prefix "")
endif()
if(FortranCInterface_MODULE_${form}SUFFIX)
set(_suffix "##${FortranCInterface_MODULE_${form}SUFFIX}")
else()
set(_suffix "")
endif()
set(_name "${_name_${FortranCInterface_MODULE_${form}CASE}}")
set(_middle "##${FortranCInterface_MODULE_${form}MIDDLE}##")
set(FortranCInterface_MODULE${form}_MACRO
"(mod_name,name, mod_NAME,NAME) ${_prefix}mod_${_name}${_middle}${_name}${_suffix}")
endif()
endforeach()
# Summarize what is available.
foreach(scope GLOBAL MODULE)
if(FortranCInterface_${scope}_SYMBOL AND
FortranCInterface_${scope}__SYMBOL)
set(FortranCInterface_${scope}_FOUND 1)
else()
set(FortranCInterface_${scope}_FOUND 0)
endif()
endforeach()
# Record the detection results.
configure_file(${FortranCInterface_SOURCE_DIR}/Output.cmake.in
${FortranCInterface_BINARY_DIR}/Output.cmake @ONLY)
file(APPEND ${FortranCInterface_BINARY_DIR}/Output.cmake "\n")
# Report the results.
if(FortranCInterface_GLOBAL_FOUND)
if(FortranCInterface_MODULE_FOUND)
set(_result "Found GLOBAL and MODULE mangling")
else()
set(_result "Found GLOBAL but not MODULE mangling")
endif()
elseif(NOT _result)
set(_result "Failed to recognize symbols")
endif()
message(STATUS "Detecting Fortran/C Interface - ${_result}")
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