CheckFortranSourceCompiles¶
Check if given Fortran source compiles and links into an executable.
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check_fortran_source_compiles¶
- check_fortran_source_compiles(<code> <resultVar> [FAIL_REGEX <regex>...] [SRC_EXT <extension>] ) - Checks that the source supplied in - <code>can be compiled as a Fortran source file and linked as an executable. The- <code>must be a Fortran program containing at least an- endstatement–for example:- check_fortran_source_compiles("character :: b; error stop b; end" F2018ESTOPOK SRC_EXT F90) - This command can help avoid costly build processes when a compiler lacks support for a necessary feature, or a particular vendor library is not compatible with the Fortran compiler version being used. This generate-time check may advise the user of such before the main build process. See also the - check_fortran_source_runs()command to actually run the compiled code.- The result will be stored in the internal cache variable - <resultVar>, with a boolean true value for success and boolean false for failure.- If - FAIL_REGEXis provided, then failure is determined by checking if anything in the output matches any of the specified regular expressions.- By default, the test source file will be given a - .Ffile extension. The- SRC_EXToption can be used to override this with- .<extension>instead–- .F90is a typical choice.- The underlying check is performed by the - try_compile()command. The compile and link commands can be influenced by setting any of the following variables prior to calling- check_fortran_source_compiles():- CMAKE_REQUIRED_FLAGS
- Additional flags to pass to the compiler. Note that the contents of
CMAKE_Fortran_FLAGSand its associated configuration-specific variable are automatically added to the compiler command before the contents ofCMAKE_REQUIRED_FLAGS.
- CMAKE_REQUIRED_DEFINITIONS
- A ;-list of compiler definitions of the form
-DFOOor-DFOO=bar. A definition for the name specified by<resultVar>will also be added automatically.
- CMAKE_REQUIRED_INCLUDES
- A ;-list of header search paths to pass to
the compiler. These will be the only header search paths used by
try_compile(), i.e. the contents of theINCLUDE_DIRECTORIESdirectory property will be ignored.
- CMAKE_REQUIRED_LINK_OPTIONS
- A ;-list of options to add to the link
command (see try_compile()for further details).
- CMAKE_REQUIRED_LIBRARIES
- A ;-list of libraries to add to the link
command. These can be the name of system libraries or they can be
Imported Targets (see try_compile()for further details).
- CMAKE_REQUIRED_QUIET
- If this variable evaluates to a boolean true value, all status messages associated with the check will be suppressed.
 - The check is only performed once, with the result cached in the variable named by - <resultVar>. Every subsequent CMake run will re-use this cached value rather than performing the check again, even if the- <code>changes. In order to force the check to be re-evaluated, the variable named by- <resultVar>must be manually removed from the cache.
