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CMake/Modules/FortranCInterface.cmake

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Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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# - Fortran/C Interface Detection
# This module automatically detects the API by which C and Fortran
# languages interact. Variables indicate if the mangling is found:
# FortranCInterface_GLOBAL_FOUND = Global subroutines and functions
# FortranCInterface_MODULE_FOUND = Module subroutines and functions
# (declared by "MODULE PROCEDURE")
# A function is provided to generate a C header file containing macros
# to mangle symbol names:
# FortranCInterface_HEADER(<file>
# [MACRO_NAMESPACE <macro-ns>]
# [SYMBOL_NAMESPACE <ns>]
# [SYMBOLS [<module>:]<function> ...])
# It generates in <file> definitions of the following macros:
# #define FortranCInterface_GLOBAL (name,NAME) ...
# #define FortranCInterface_GLOBAL_(name,NAME) ...
# #define FortranCInterface_MODULE (mod,name, MOD,NAME) ...
# #define FortranCInterface_MODULE_(mod,name, MOD,NAME) ...
# These macros mangle four categories of Fortran symbols,
# respectively:
# - Global symbols without '_': call mysub()
# - Global symbols with '_' : call my_sub()
# - Module symbols without '_': use mymod; call mysub()
# - Module symbols with '_' : use mymod; call my_sub()
# If mangling for a category is not known, its macro is left undefined.
# All macros require raw names in both lower case and upper case.
# The MACRO_NAMESPACE option replaces the default "FortranCInterface_"
# prefix with a given namespace "<macro-ns>".
ENH: add fortran link discovery module
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#
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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# The SYMBOLS option lists symbols to mangle automatically with C
# preprocessor definitions:
# <function> ==> #define <ns><function> ...
# <module>:<function> ==> #define <ns><module>_<function> ...
# If the mangling for some symbol is not known then no preprocessor
# definition is created, and a warning is displayed.
# The SYMBOL_NAMESPACE option prefixes all preprocessor definitions
# generated by the SYMBOLS option with a given namespace "<ns>".
ENH: add fortran link discovery module
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#
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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# Example usage:
# include(FortranCInterface)
# FortranCInterface_HEADER(FC.h MACRO_NAMESPACE "FC_")
# This creates a "FC.h" header that defines mangling macros
# FC_GLOBAL(), FC_GLOBAL_(), FC_MODULE(), and FC_MODULE_().
ENH: add fortran link discovery module
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#
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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# Example usage:
# include(FortranCInterface)
# FortranCInterface_HEADER(FCMangle.h
# MACRO_NAMESPACE "FC_"
# SYMBOL_NAMESPACE "FC_"
# SYMBOLS mysub mymod:my_sub)
FortranCInterface: Fix doc typo FC.h -> FCMangle.h
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# This creates a "FCMangle.h" header that defines the same FC_*()
# mangling macros as the previous example plus preprocessor symbols
# FC_mysub and FC_mymod_my_sub.
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#
Create FortranCInterface_VERIFY function This function builds a simple test project using a combination of Fortran and C (and optionally C++) to verify that the compilers are compatible. The idea is to help projects report very early to users that the compilers specified cannot mix languages.
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# Another function is provided to verify that the Fortran and C/C++
# compilers work together:
# FortranCInterface_VERIFY([CXX] [QUIET])
# It tests whether a simple test executable using Fortran and C (and
# C++ when the CXX option is given) compiles and links successfully.
# The result is stored in the cache entry FortranCInterface_VERIFIED_C
# (or FortranCInterface_VERIFIED_CXX if CXX is given) as a boolean.
# If the check fails and QUIET is not given the function terminates
# with a FATAL_ERROR message describing the problem. The purpose of
# this check is to stop a build early for incompatible compiler
# combinations.
#
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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# FortranCInterface is aware of possible GLOBAL and MODULE manglings
# for many Fortran compilers, but it also provides an interface to
# specify new possible manglings. Set the variables
# FortranCInterface_GLOBAL_SYMBOLS
# FortranCInterface_MODULE_SYMBOLS
# before including FortranCInterface to specify manglings of the
# symbols "MySub", "My_Sub", "MyModule:MySub", and "My_Module:My_Sub".
# For example, the code:
# set(FortranCInterface_GLOBAL_SYMBOLS mysub_ my_sub__ MYSUB_)
# # ^^^^^ ^^^^^^ ^^^^^
# set(FortranCInterface_MODULE_SYMBOLS
# __mymodule_MOD_mysub __my_module_MOD_my_sub)
# # ^^^^^^^^ ^^^^^ ^^^^^^^^^ ^^^^^^
# include(FortranCInterface)
# tells FortranCInterface to try given GLOBAL and MODULE manglings.
# (The carets point at raw symbol names for clarity in this example
# but are not needed.)
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
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#=============================================================================
# Copyright 2008-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
Modules: Fix spelling 'To distributed' -> 'To distribute'
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# (To distribute this file outside of CMake, substitute the full
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
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# License text for the above reference.)
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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#-----------------------------------------------------------------------------
# Execute at most once in a project.
if(FortranCInterface_SOURCE_DIR)
return()
endif()
FortranCInterface: Use CMake 2.8.0 behavior The FortranCInterface module should execute with CMake 2.8.0 behavior even if policies are set differently by the including project. In particular, it makes use of empty list elements and therefore expects NEW behavior of CMP0007.
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# Use CMake 2.8.0 behavior for this module regardless of including context.
cmake_policy(PUSH)
cmake_policy(VERSION 2.8.0)
Teach FortranCInterface to verify languages This module requires both C and Fortran to be enabled, so error-out if they are not.
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#-----------------------------------------------------------------------------
# Verify that C and Fortran are available.
foreach(lang C Fortran)
if(NOT CMAKE_${lang}_COMPILER_LOADED)
message(FATAL_ERROR
"FortranCInterface requires the ${lang} language to be enabled.")
endif()
endforeach()
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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#-----------------------------------------------------------------------------
set(FortranCInterface_SOURCE_DIR ${CMAKE_ROOT}/Modules/FortranCInterface)
Teach FortranCInterface to load outside results We split the main detection logic into a Detect.cmake support module and load it only when detection results are not already available. This allows results computed by the main project to be used in try-compile projects without recomputing them. The call to try_compile() need only to pass FortranCInterface_BINARY_DIR through the CMAKE_FLAGS option.
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# Create the interface detection project if it does not exist.
if(NOT FortranCInterface_BINARY_DIR)
set(FortranCInterface_BINARY_DIR ${CMAKE_BINARY_DIR}/CMakeFiles/FortranCInterface)
include(${FortranCInterface_SOURCE_DIR}/Detect.cmake)
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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endif()
# Load the detection results.
include(${FortranCInterface_BINARY_DIR}/Output.cmake)
#-----------------------------------------------------------------------------
function(FortranCInterface_HEADER file)
# Parse arguments.
if(IS_ABSOLUTE "${file}")
set(FILE "${file}")
else()
set(FILE "${CMAKE_CURRENT_BINARY_DIR}/${file}")
endif()
set(MACRO_NAMESPACE "FortranCInterface_")
set(SYMBOL_NAMESPACE)
set(SYMBOLS)
set(doing)
foreach(arg ${ARGN})
if("x${arg}" MATCHES "^x(SYMBOLS|SYMBOL_NAMESPACE|MACRO_NAMESPACE)$")
set(doing "${arg}")
elseif("x${doing}" MATCHES "^x(SYMBOLS)$")
list(APPEND "${doing}" "${arg}")
elseif("x${doing}" MATCHES "^x(SYMBOL_NAMESPACE|MACRO_NAMESPACE)$")
set("${doing}" "${arg}")
set(doing)
else()
message(AUTHOR_WARNING "Unknown argument: \"${arg}\"")
endif()
endforeach()
# Generate macro definitions.
set(HEADER_CONTENT)
set(_desc_GLOBAL "/* Mangling for Fortran global symbols without underscores. */")
set(_desc_GLOBAL_ "/* Mangling for Fortran global symbols with underscores. */")
set(_desc_MODULE "/* Mangling for Fortran module symbols without underscores. */")
set(_desc_MODULE_ "/* Mangling for Fortran module symbols with underscores. */")
foreach(macro GLOBAL GLOBAL_ MODULE MODULE_)
if(FortranCInterface_${macro}_MACRO)
ENH: add support for module functions
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set(HEADER_CONTENT "${HEADER_CONTENT}
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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${_desc_${macro}}
#define ${MACRO_NAMESPACE}${macro}${FortranCInterface_${macro}_MACRO}
ENH: add support for module functions
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")
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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endif()
endforeach()
# Generate symbol mangling definitions.
if(SYMBOLS)
set(HEADER_CONTENT "${HEADER_CONTENT}
/*--------------------------------------------------------------------------*/
/* Mangle some symbols automatically. */
ENH: add fortran link discovery module
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")
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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endif()
foreach(f ${SYMBOLS})
if("${f}" MATCHES ":")
# Module symbol name. Parse "<module>:<function>" syntax.
string(REPLACE ":" ";" pieces "${f}")
list(GET pieces 0 module)
list(GET pieces 1 function)
string(TOUPPER "${module}" m_upper)
string(TOLOWER "${module}" m_lower)
string(TOUPPER "${function}" f_upper)
string(TOLOWER "${function}" f_lower)
if("${function}" MATCHES "_")
set(form "_")
else()
set(form "")
endif()
if(FortranCInterface_MODULE${form}_MACRO)
set(HEADER_CONTENT "${HEADER_CONTENT}#define ${SYMBOL_NAMESPACE}${module}_${function} ${MACRO_NAMESPACE}MODULE${form}(${m_lower},${f_lower}, ${m_upper},${f_upper})\n")
else()
message(AUTHOR_WARNING "No FortranCInterface mangling known for ${f}")
endif()
else()
# Global symbol name.
if("${f}" MATCHES "_")
set(form "_")
else()
set(form "")
endif()
string(TOUPPER "${f}" f_upper)
string(TOLOWER "${f}" f_lower)
if(FortranCInterface_GLOBAL${form}_MACRO)
set(HEADER_CONTENT "${HEADER_CONTENT}#define ${SYMBOL_NAMESPACE}${f} ${MACRO_NAMESPACE}GLOBAL${form}(${f_lower}, ${f_upper})\n")
else()
message(AUTHOR_WARNING "No FortranCInterface mangling known for ${f}")
endif()
endif()
ENH: add fortran link discovery module
2008-10-27 19:23:14 +00:00
endforeach(f)
Rewrite FortranCInterface module This is a new FortranCInterface.cmake module to replace the previous prototype. All module support files lie in a FortranCInterface directory next to it. This module uses a new approach to detect Fortran symbol mangling. We build a single test project which defines symbols in a Fortran library (one per object-file) and calls them from a Fortran executable. The executable links to a C library which defines symbols encoding all known manglings (one per object-file). The C library falls back to the Fortran library for symbols it cannot provide. Therefore the executable will always link, but prefers the C-implemented symbols when they match. These symbols store string literals of the form INFO:symbol[<name>] so we can parse them out of the executable. This module also provides a simpler interface. It always detects the mangling as soon as it is included. A single macro is provided to generate mangling macros and optionally pre-mangled symbols.
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# Store the content.
configure_file(${FortranCInterface_SOURCE_DIR}/Macro.h.in ${FILE} @ONLY)
endfunction()
Create FortranCInterface_VERIFY function This function builds a simple test project using a combination of Fortran and C (and optionally C++) to verify that the compilers are compatible. The idea is to help projects report very early to users that the compilers specified cannot mix languages.
2009-08-24 12:49:35 +00:00
function(FortranCInterface_VERIFY)
# Check arguments.
set(lang C)
set(quiet 0)
set(verify_cxx 0)
foreach(arg ${ARGN})
if("${arg}" STREQUAL "QUIET")
set(quiet 1)
elseif("${arg}" STREQUAL "CXX")
set(lang CXX)
set(verify_cxx 1)
else()
message(FATAL_ERROR
"FortranCInterface_VERIFY - called with unknown argument:\n ${arg}")
endif()
endforeach()
if(NOT CMAKE_${lang}_COMPILER_LOADED)
message(FATAL_ERROR
"FortranCInterface_VERIFY(${lang}) requires ${lang} to be enabled.")
endif()
# Build the verification project if not yet built.
if(NOT DEFINED FortranCInterface_VERIFIED_${lang})
set(_desc "Verifying Fortran/${lang} Compiler Compatibility")
message(STATUS "${_desc}")
# Build a sample project which reports symbols.
try_compile(FortranCInterface_VERIFY_${lang}_COMPILED
${FortranCInterface_BINARY_DIR}/Verify${lang}
${FortranCInterface_SOURCE_DIR}/Verify
VerifyFortranC
CMAKE_FLAGS -DVERIFY_CXX=${verify_cxx}
Make FortranCInterface_VERIFY verbose on failure We enable verbose build output in the try_compile of the simple project. This makes valuable information available in the case of failure.
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-DCMAKE_VERBOSE_MAKEFILE=ON
FortranCInterface: Support '=' in language flags The commit "FortranCInterface: Honor language flags in checks" taught the FortranCInterface module to pass C and Fortran flags into its detection and verification checks. We improve on the change to allow the '=' character in the language flags. This requires passing the cache entry type with the -D options.
2009-12-15 19:02:52 +00:00
"-DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}"
"-DCMAKE_CXX_FLAGS:STRING=${CMAKE_CXX_FLAGS}"
"-DCMAKE_Fortran_FLAGS:STRING=${CMAKE_Fortran_FLAGS}"
Create FortranCInterface_VERIFY function This function builds a simple test project using a combination of Fortran and C (and optionally C++) to verify that the compilers are compatible. The idea is to help projects report very early to users that the compilers specified cannot mix languages.
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OUTPUT_VARIABLE _output)
file(WRITE "${FortranCInterface_BINARY_DIR}/Verify${lang}/output.txt" "${_output}")
# Report results.
if(FortranCInterface_VERIFY_${lang}_COMPILED)
message(STATUS "${_desc} - Success")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"${_desc} passed with the following output:\n${_output}\n\n")
set(FortranCInterface_VERIFIED_${lang} 1 CACHE INTERNAL "Fortran/${lang} compatibility")
else()
message(STATUS "${_desc} - Failed")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"${_desc} failed with the following output:\n${_output}\n\n")
set(FortranCInterface_VERIFIED_${lang} 0 CACHE INTERNAL "Fortran/${lang} compatibility")
endif()
unset(FortranCInterface_VERIFY_${lang}_COMPILED CACHE)
endif()
# Error if compilers are incompatible.
if(NOT FortranCInterface_VERIFIED_${lang} AND NOT quiet)
file(READ "${FortranCInterface_BINARY_DIR}/Verify${lang}/output.txt" _output)
string(REGEX REPLACE "\n" "\n " _output "${_output}")
message(FATAL_ERROR
"The Fortran compiler:\n ${CMAKE_Fortran_COMPILER}\n"
"and the ${lang} compiler:\n ${CMAKE_${lang}_COMPILER}\n"
"failed to compile a simple test project using both languages. "
"The output was:\n ${_output}")
endif()
endfunction()
FortranCInterface: Use CMake 2.8.0 behavior The FortranCInterface module should execute with CMake 2.8.0 behavior even if policies are set differently by the including project. In particular, it makes use of empty list elements and therefore expects NEW behavior of CMP0007.
2009-11-17 19:33:28 +00:00
# Restore including context policies.
cmake_policy(POP)
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