ENH: fix bug where sharedforward would not work if there was a space in the path...
[cmake.git] / Modules / CMakeDetermineFortranCompiler.cmake
blobdefb5a7f8daa4e20991006ba395555e7cba4ce55
2 # determine the compiler to use for Fortran programs
3 # NOTE, a generator may set CMAKE_Fortran_COMPILER before
4 # loading this file to force a compiler.
5 # use environment variable FC first if defined by user, next use 
6 # the cmake variable CMAKE_GENERATOR_FC which can be defined by a generator
7 # as a default compiler
9 IF(NOT CMAKE_Fortran_COMPILER)
10   # prefer the environment variable CC
11   IF($ENV{FC} MATCHES ".+")
12     GET_FILENAME_COMPONENT(CMAKE_Fortran_COMPILER_INIT $ENV{FC} PROGRAM PROGRAM_ARGS CMAKE_Fortran_FLAGS_ENV_INIT)
13     IF(CMAKE_Fortran_FLAGS_ENV_INIT)
14       SET(CMAKE_Fortran_COMPILER_ARG1 "${CMAKE_Fortran_FLAGS_ENV_INIT}" CACHE STRING "First argument to Fortran compiler")
15     ENDIF(CMAKE_Fortran_FLAGS_ENV_INIT)
16     IF(EXISTS ${CMAKE_Fortran_COMPILER_INIT})
17     ELSE(EXISTS ${CMAKE_Fortran_COMPILER_INIT})
18       MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable FC:\n$ENV{FC}.") 
19     ENDIF(EXISTS ${CMAKE_Fortran_COMPILER_INIT})
20   ENDIF($ENV{FC} MATCHES ".+")
21   
22   # next try prefer the compiler specified by the generator
23   IF(CMAKE_GENERATOR_FC) 
24     IF(NOT CMAKE_Fortran_COMPILER_INIT)
25       SET(CMAKE_Fortran_COMPILER_INIT ${CMAKE_GENERATOR_FC})
26     ENDIF(NOT CMAKE_Fortran_COMPILER_INIT)
27   ENDIF(CMAKE_GENERATOR_FC)
29   # finally list compilers to try
30   IF(CMAKE_Fortran_COMPILER_INIT)
31     SET(CMAKE_Fortran_COMPILER_LIST ${CMAKE_Fortran_COMPILER_INIT})
32   ELSE(CMAKE_Fortran_COMPILER_INIT)
33     # Known compilers:
34     #  f77/f90/f95: generic compiler names
35     #  g77: GNU Fortran 77 compiler
36     #  gfortran: putative GNU Fortran 95+ compiler (in progress)
37     #  fort77: native F77 compiler under HP-UX (and some older Crays)
38     #  frt: Fujitsu F77 compiler
39     #  pgf77/pgf90/pgf95: Portland Group F77/F90/F95 compilers
40     #  xlf/xlf90/xlf95: IBM (AIX) F77/F90/F95 compilers
41     #  lf95: Lahey-Fujitsu F95 compiler
42     #  fl32: Microsoft Fortran 77 "PowerStation" compiler
43     #  af77: Apogee F77 compiler for Intergraph hardware running CLIX
44     #  epcf90: "Edinburgh Portable Compiler" F90
45     #  fort: Compaq (now HP) Fortran 90/95 compiler for Tru64 and Linux/Alpha
46     #  ifc: Intel Fortran 95 compiler for Linux/x86
47     #  efc: Intel Fortran 95 compiler for IA64
48     #
49     #  The order is 95 or newer compilers first, then 90, 
50     #  then 77 or older compilers, gnu is always last in the group,
51     #  so if you paid for a compiler it is picked by default.
52     # NOTE for testing purposes this list is DUPLICATED in
53     # CMake/Source/CMakeLists.txt, IF YOU CHANGE THIS LIST,
54     # PLEASE UPDATE THAT FILE AS WELL!
55     SET(CMAKE_Fortran_COMPILER_LIST
56       ifort ifc efc f95 pgf95 lf95 xlf95 fort gfortran g95 f90
57       pgf90 xlf90 epcf90 fort77 frt pgf77 xlf fl32 af77 g77 f77
58       )
59   ENDIF(CMAKE_Fortran_COMPILER_INIT)
61   # Find the compiler.
62   FIND_PROGRAM(CMAKE_Fortran_COMPILER NAMES ${CMAKE_Fortran_COMPILER_LIST} DOC "Fortran compiler")
63   IF(CMAKE_Fortran_COMPILER_INIT AND NOT CMAKE_Fortran_COMPILER)
64     SET(CMAKE_Fortran_COMPILER "${CMAKE_Fortran_COMPILER_INIT}" CACHE FILEPATH "Fortran compiler" FORCE)
65   ENDIF(CMAKE_Fortran_COMPILER_INIT AND NOT CMAKE_Fortran_COMPILER)
66 ENDIF(NOT CMAKE_Fortran_COMPILER)
68 MARK_AS_ADVANCED(CMAKE_Fortran_COMPILER)  
70 # Build a small source file to identify the compiler.
71 IF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
72   SET(CMAKE_Fortran_COMPILER_ID_RUN 1)
73   SET(CMAKE_Fortran_PLATFORM_ID "Windows")
75   # TODO: Set the compiler id.  It is probably MSVC but
76   # the user may be using an integrated Intel compiler.
77   # SET(CMAKE_Fortran_COMPILER_ID "MSVC")
78 ENDIF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
80 IF(NOT CMAKE_Fortran_COMPILER_ID_RUN)
81   SET(CMAKE_Fortran_COMPILER_ID_RUN 1)
83   # Each entry in this list is a set of extra flags to try
84   # adding to the compile line to see if it helps produce
85   # a valid identification executable.
86   SET(CMAKE_Fortran_COMPILER_ID_TEST_FLAGS
87     # Try compiling to an object file only.
88     "-c"
90     # Intel on windows does not preprocess by default.
91     "-fpp"
92     )
94   # Try to identify the compiler.
95   SET(CMAKE_Fortran_COMPILER_ID)
96   INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
97   CMAKE_DETERMINE_COMPILER_ID(Fortran FFLAGS CMakeFortranCompilerId.F90)
99   # Fall back to old is-GNU test.
100   IF(NOT CMAKE_Fortran_COMPILER_ID)
101     EXEC_PROGRAM(${CMAKE_Fortran_COMPILER}
102       ARGS ${CMAKE_Fortran_COMPILER_ID_FLAGS_LIST} -E "\"${CMAKE_ROOT}/Modules/CMakeTestGNU.c\""
103       OUTPUT_VARIABLE CMAKE_COMPILER_OUTPUT RETURN_VALUE CMAKE_COMPILER_RETURN)
104     IF(NOT CMAKE_COMPILER_RETURN)
105       IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
106         SET(CMAKE_Fortran_COMPILER_ID "GNU")
107         FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
108           "Determining if the Fortran compiler is GNU succeeded with "
109           "the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n")
110       ELSE("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
111         FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
112           "Determining if the Fortran compiler is GNU failed with "
113           "the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n")
114       ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
115       IF(NOT CMAKE_Fortran_PLATFORM_ID)
116         IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_MINGW.*" )
117           SET(CMAKE_Fortran_PLATFORM_ID "MinGW")
118         ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_MINGW.*" )
119         IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_CYGWIN.*" )
120           SET(CMAKE_Fortran_PLATFORM_ID "Cygwin")
121         ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_CYGWIN.*" )
122       ENDIF(NOT CMAKE_Fortran_PLATFORM_ID)
123     ENDIF(NOT CMAKE_COMPILER_RETURN)
124   ENDIF(NOT CMAKE_Fortran_COMPILER_ID)
126   # Set old compiler and platform id variables.
127   IF("${CMAKE_Fortran_COMPILER_ID}" MATCHES "GNU")
128     SET(CMAKE_COMPILER_IS_GNUG77 1)
129   ENDIF("${CMAKE_Fortran_COMPILER_ID}" MATCHES "GNU")
130   IF("${CMAKE_Fortran_PLATFORM_ID}" MATCHES "MinGW")
131     SET(CMAKE_COMPILER_IS_MINGW 1)
132   ELSEIF("${CMAKE_Fortran_PLATFORM_ID}" MATCHES "Cygwin")
133     SET(CMAKE_COMPILER_IS_CYGWIN 1)
134   ENDIF("${CMAKE_Fortran_PLATFORM_ID}" MATCHES "MinGW")
135 ENDIF(NOT CMAKE_Fortran_COMPILER_ID_RUN)
137 INCLUDE(CMakeFindBinUtils)
139 # configure variables set in this file for fast reload later on
140 CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeFortranCompiler.cmake.in
141   ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeFortranCompiler.cmake
142   @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
143   )
144 SET(CMAKE_Fortran_COMPILER_ENV_VAR "FC")