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FindSWIG: Enhance lookup capabilities using VALIDATOR argument

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Currently, swig executable naming strategy is a bit odd: For example swig4.0 executable
can have version 4.2.0!i Moreover, not all platforms provide a versioned executable.

So, to pick-up the right executable when multiple versions are available,
use find_program(... VALIDATOR ...).
This commit is contained in:
Marc Chevrier
2024-03-20 14:56:16 +01:00
parent ef51650558
commit 8ff66a766f
1 changed files with 56 additions and 18 deletions
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74
Modules/FindSWIG.cmake
View File

@@ -58,6 +58,50 @@ optional Fortran support:
#]=======================================================================]
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
function(_swig_get_version _swig_executable _swig_version)
unset(${_swig_version} PARENT_SCOPE)
# Determine SWIG version
execute_process(COMMAND "${_swig_executable}" -version
OUTPUT_VARIABLE _swig_output
ERROR_VARIABLE _swig_output
RESULT_VARIABLE _swig_result)
if(_swig_result)
set_property (CACHE _SWIG_REASON_FAILURE PROPERTY VALUE "Cannot use the executable \"${_swig_executable}\"")
if (_swig_output)
set_property (CACHE _SWIG_REASON_FAILURE APPEND_STRING PROPERTY VALUE ": ${_swig_output}")
endif()
else()
string(REGEX REPLACE ".*SWIG Version[^0-9.]*\([0-9.]+\).*" "\\1"
_swig_output "${_swig_output}")
set(${_swig_version} ${_swig_output} PARENT_SCOPE)
endif()
endfunction()
function(_swig_validate_find_executable status executable)
_swig_get_version("${executable}" _swig_find_version)
if(NOT _swig_find_version)
# executable is unusable
set (${status} FALSE PARENT_SCOPE)
return()
endif()
if(NOT SWIG_FIND_VERSION)
return()
endif()
find_package_check_version(${_swig_find_version} _swig_version_is_valid HANDLE_VERSION_RANGE)
if(_swig_version_is_valid)
unset(_SWIG_REASON_FAILURE CACHE)
else()
set (${status} FALSE PARENT_SCOPE)
set_property (CACHE _SWIG_REASON_FAILURE PROPERTY VALUE "Could NOT find SWIG: Found unsuitable version \"${_swig_find_version}\" for the executable \"${executable}\"")
endif()
endfunction()
unset (_SWIG_REASON_FAILURE)
set (_SWIG_REASON_FAILURE CACHE INTERNAL "SWIG reason failure")
# compute list of possible names
unset (_SWIG_NAMES)
if (SWIG_FIND_VERSION_RANGE)
@@ -86,7 +130,8 @@ if (NOT _SWIG_NAMES)
set (_SWIG_NAMES swig4.0 swig3.0 swig2.0)
endif()
find_program(SWIG_EXECUTABLE NAMES ${_SWIG_NAMES} swig NAMES_PER_DIR)
find_program(SWIG_EXECUTABLE NAMES ${_SWIG_NAMES} swig NAMES_PER_DIR
VALIDATOR _swig_validate_find_executable)
unset(_SWIG_NAMES)
if(SWIG_EXECUTABLE AND NOT SWIG_DIR)
@@ -115,17 +160,8 @@ endif()
if(SWIG_EXECUTABLE AND SWIG_DIR AND NOT SWIG_VERSION)
# Determine SWIG version
execute_process(COMMAND "${SWIG_EXECUTABLE}" -version
OUTPUT_VARIABLE _swig_output
ERROR_VARIABLE _swig_output
RESULT_VARIABLE _swig_result)
if(_swig_result)
message(SEND_ERROR "Command \"${SWIG_EXECUTABLE} -version\" failed with output:\n${_swig_output}")
else()
string(REGEX REPLACE ".*SWIG Version[^0-9.]*\([0-9.]+\).*" "\\1"
_swig_output "${_swig_output}")
set(SWIG_VERSION ${_swig_output} CACHE STRING "Swig version" FORCE)
endif()
_swig_get_version("${SWIG_EXECUTABLE}" _swig_output)
set(SWIG_VERSION ${_swig_output} CACHE STRING "Swig version" FORCE)
endif()
if(SWIG_EXECUTABLE AND SWIG_FIND_COMPONENTS)
@@ -145,16 +181,18 @@ if(SWIG_EXECUTABLE AND SWIG_FIND_COMPONENTS)
endif()
endif()
unset(_swig_output)
unset(_swig_error)
unset(_swig_result)
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(
SWIG HANDLE_COMPONENTS
REQUIRED_VARS SWIG_EXECUTABLE SWIG_DIR
VERSION_VAR SWIG_VERSION
HANDLE_VERSION_RANGE)
HANDLE_VERSION_RANGE
FAIL_MESSAGE "${_SWIG_REASON_FAILURE}")
unset(_swig_output)
unset(_swig_error)
unset(_swig_result)
unset(_SWIG_REASON_FAILURE CACHE)
if(SWIG_FOUND)
set(SWIG_USE_FILE "${CMAKE_CURRENT_LIST_DIR}/UseSWIG.cmake")