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cmake_minimum_required(VERSION 2.6.3)
project(FortranCInterface C Fortran)
include(${FortranCInterface_BINARY_DIR}/Input.cmake OPTIONAL)
# Check if the C compiler supports '$' in identifiers.
include(CheckCSourceCompiles)
check_c_source_compiles("
extern int dollar$(void);
int main() { return 0; }
" C_SUPPORTS_DOLLAR)
# List manglings of global symbol names to try.
set(global_symbols
my_sub # VisualAge
my_sub_ # GNU, Intel, HP, SunPro, MIPSpro
my_sub__ # GNU g77
mysub # VisualAge
mysub_ # GNU, Intel, HP, SunPro, MIPSpro
${FortranCInterface_GLOBAL_SYMBOLS}
)
list(REMOVE_DUPLICATES global_symbols)
# List manglings of module symbol names to try.
set(module_symbols
__my_module_MOD_my_sub # GNU 4.3
__my_module_NMOD_my_sub # VisualAge
__my_module__my_sub # GNU 4.2
__mymodule_MOD_mysub # GNU 4.3
__mymodule_NMOD_mysub # VisualAge
__mymodule__mysub # GNU 4.2
my_module$my_sub # HP
my_module_mp_my_sub_ # Intel
my_module_my_sub_ # PGI
mymodule$mysub # HP
mymodule_mp_mysub_ # Intel
mymodule_mysub_ # PGI
${FortranCInterface_MODULE_SYMBOLS}
)
list(REMOVE_DUPLICATES module_symbols)
# Note that some compiler manglings cannot be invoked from C:
# MIPSpro uses "MY_SUB.in.MY_MODULE"
# SunPro uses "my_module.my_sub_"
# Add module symbols only with Fortran90.
if(CMAKE_Fortran_COMPILER_SUPPORTS_F90)
set(myfort_modules mymodule.f90 my_module.f90)
set(call_mod call_mod.f90)
set_property(SOURCE main.F PROPERTY COMPILE_DEFINITIONS CALL_MOD)
else()
set(module_symbols)
endif()
# Generate C symbol sources.
foreach(symbol IN LISTS global_symbols module_symbols)
# Skip symbols with '$' if C cannot handle them.
if(C_SUPPORTS_DOLLAR OR NOT "${symbol}" MATCHES "\\$")
if("${symbol}" MATCHES "SUB")
set(upper "-UPPER")
else()
set(upper)
endif()
string(REPLACE "$" "S" name "${symbol}")
set(source ${CMAKE_CURRENT_BINARY_DIR}/symbols/${name}${upper}.c)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/symbol.c.in ${source} @ONLY)
list(APPEND symbol_sources ${source})
endif()
endforeach()
# Provide symbols through Fortran.
add_library(myfort STATIC mysub.f my_sub.f ${myfort_modules})
# Provide symbols through C but fall back to Fortran.
add_library(symbols STATIC mymodule_.c my_module_.c ${symbol_sources})
target_link_libraries(symbols myfort)
# Require symbols through Fortran.
add_executable(FortranCInterface main.F call_sub.f ${call_mod})
target_link_libraries(FortranCInterface symbols)
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