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## Utility CMake functions.
# ----------------------------------------------------------------------------
## Convert boolean value to 0 or 1
macro (bool_to_int VAR)
if (${VAR})
set (${VAR} 1)
else ()
set (${VAR} 0)
endif ()
endmacro ()
# ----------------------------------------------------------------------------
## Extract version numbers from version string
function (version_numbers version major minor patch)
if (version MATCHES "([0-9]+)(\\.[0-9]+)?(\\.[0-9]+)?(rc[1-9][0-9]*|[a-z]+)?")
if (CMAKE_MATCH_1)
set (_major ${CMAKE_MATCH_1})
else ()
set (_major 0)
endif ()
if (CMAKE_MATCH_2)
set (_minor ${CMAKE_MATCH_2})
string (REGEX REPLACE "^\\." "" _minor "${_minor}")
else ()
set (_minor 0)
endif ()
if (CMAKE_MATCH_3)
set (_patch ${CMAKE_MATCH_3})
string (REGEX REPLACE "^\\." "" _patch "${_patch}")
else ()
set (_patch 0)
endif ()
else ()
set (_major 0)
set (_minor 0)
set (_patch 0)
endif ()
set ("${major}" "${_major}" PARENT_SCOPE)
set ("${minor}" "${_minor}" PARENT_SCOPE)
set ("${patch}" "${_patch}" PARENT_SCOPE)
endfunction ()
# ----------------------------------------------------------------------------
## Determine if cache entry exists
macro (gflags_is_cached retvar varname)
if (DEFINED ${varname})
get_property (${retvar} CACHE ${varname} PROPERTY TYPE SET)
else ()
set (${retvar} FALSE)
endif ()
endmacro ()
# ----------------------------------------------------------------------------
## Add gflags configuration variable
#
# The default value of the (cached) configuration value can be overridden either
# on the CMake command-line or the super-project by setting the GFLAGS_<varname>
# variable. When gflags is a subproject of another project (GFLAGS_IS_SUBPROJECT),
# the variable is not added to the CMake cache. Otherwise it is cached.
macro (gflags_define type varname docstring default)
# note that ARGC must be expanded here, as it is not a "real" variable
# (see the CMake documentation for the macro command)
if ("${ARGC}" GREATER 5)
message (FATAL_ERROR "gflags_variable: Too many macro arguments")
endif ()
if (NOT DEFINED GFLAGS_${varname})
if (GFLAGS_IS_SUBPROJECT AND "${ARGC}" EQUAL 5)
set (GFLAGS_${varname} "${ARGV4}")
else ()
set (GFLAGS_${varname} "${default}")
endif ()
endif ()
if (GFLAGS_IS_SUBPROJECT)
if (NOT DEFINED ${varname})
set (${varname} "${GFLAGS_${varname}}")
endif ()
else ()
set (${varname} "${GFLAGS_${varname}}" CACHE ${type} "${docstring}")
endif ()
endmacro ()
# ----------------------------------------------------------------------------
## Set property of cached gflags configuration variable
macro (gflags_property varname property value)
gflags_is_cached (_cached ${varname})
if (_cached)
# note that property must be expanded here, as it is not a "real" variable
# (see the CMake documentation for the macro command)
if ("${property}" STREQUAL "ADVANCED")
if (${value})
mark_as_advanced (FORCE ${varname})
else ()
mark_as_advanced (CLEAR ${varname})
endif ()
else ()
set_property (CACHE ${varname} PROPERTY "${property}" "${value}")
endif ()
endif ()
unset (_cached)
endmacro ()
# ----------------------------------------------------------------------------
## Modify value of gflags configuration variable
macro (gflags_set varname value)
gflags_is_cached (_cached ${varname})
if (_cached)
set_property (CACHE ${varname} PROPERTY VALUE "${value}")
else ()
set (${varname} "${value}")
endif ()
unset (_cached)
endmacro ()
# ----------------------------------------------------------------------------
## Configure public header files
function (configure_headers out)
set (tmp)
foreach (src IN LISTS ARGN)
if (IS_ABSOLUTE "${src}")
list (APPEND tmp "${src}")
elseif (EXISTS "${PROJECT_SOURCE_DIR}/src/${src}.in")
configure_file ("${PROJECT_SOURCE_DIR}/src/${src}.in" "${PROJECT_BINARY_DIR}/include/${GFLAGS_INCLUDE_DIR}/${src}" @ONLY)
list (APPEND tmp "${PROJECT_BINARY_DIR}/include/${GFLAGS_INCLUDE_DIR}/${src}")
else ()
configure_file ("${PROJECT_SOURCE_DIR}/src/${src}" "${PROJECT_BINARY_DIR}/include/${GFLAGS_INCLUDE_DIR}/${src}" COPYONLY)
list (APPEND tmp "${PROJECT_BINARY_DIR}/include/${GFLAGS_INCLUDE_DIR}/${src}")
endif ()
endforeach ()
set (${out} "${tmp}" PARENT_SCOPE)
endfunction ()
# ----------------------------------------------------------------------------
## Configure source files with .in suffix
function (configure_sources out)
set (tmp)
foreach (src IN LISTS ARGN)
if (src MATCHES ".h$" AND EXISTS "${PROJECT_SOURCE_DIR}/src/${src}.in")
configure_file ("${PROJECT_SOURCE_DIR}/src/${src}.in" "${PROJECT_BINARY_DIR}/include/${GFLAGS_INCLUDE_DIR}/${src}" @ONLY)
list (APPEND tmp "${PROJECT_BINARY_DIR}/include/${GFLAGS_INCLUDE_DIR}/${src}")
else ()
list (APPEND tmp "${PROJECT_SOURCE_DIR}/src/${src}")
endif ()
endforeach ()
set (${out} "${tmp}" PARENT_SCOPE)
endfunction ()
# ----------------------------------------------------------------------------
## Add usage test
#
# Using PASS_REGULAR_EXPRESSION and FAIL_REGULAR_EXPRESSION would
# do as well, but CMake/CTest does not allow us to specify an
# expected exit status. Moreover, the execute_test.cmake script
# sets environment variables needed by the --fromenv/--tryfromenv tests.
macro (add_gflags_test name expected_rc expected_output unexpected_output cmd)
set (args "--test_tmpdir=${PROJECT_BINARY_DIR}/Testing/Temporary"
"--srcdir=${PROJECT_SOURCE_DIR}/test")
add_test (
NAME ${name}
COMMAND "${CMAKE_COMMAND}" "-DCOMMAND:STRING=$<TARGET_FILE:${cmd}>;${args};${ARGN}"
"-DEXPECTED_RC:STRING=${expected_rc}"
"-DEXPECTED_OUTPUT:STRING=${expected_output}"
"-DUNEXPECTED_OUTPUT:STRING=${unexpected_output}"
-P "${PROJECT_SOURCE_DIR}/cmake/execute_test.cmake"
WORKING_DIRECTORY "${GFLAGS_FLAGFILES_DIR}"
)
endmacro ()
# ------------------------------------------------------------------------------
## Register installed package with CMake
#
# This function adds an entry to the CMake registry for packages with the
# path of the directory where the package configuration file of the installed
# package is located in order to help CMake find the package in a custom
# installation prefix. This differs from CMake's export(PACKAGE) command
# which registers the build directory instead.
function (register_gflags_package CONFIG_DIR)
if (NOT IS_ABSOLUTE "${CONFIG_DIR}")
set (CONFIG_DIR "${CMAKE_INSTALL_PREFIX}/${CONFIG_DIR}")
endif ()
string (MD5 REGISTRY_ENTRY "${CONFIG_DIR}")
if (WIN32)
install (CODE
"execute_process (
COMMAND reg add \"HKCU\\\\Software\\\\Kitware\\\\CMake\\\\Packages\\\\${PACKAGE_NAME}\" /v \"${REGISTRY_ENTRY}\" /d \"${CONFIG_DIR}\" /t REG_SZ /f
RESULT_VARIABLE RT
ERROR_VARIABLE ERR
OUTPUT_QUIET
)
if (RT EQUAL 0)
message (STATUS \"Register: Added HKEY_CURRENT_USER\\\\Software\\\\Kitware\\\\CMake\\\\Packages\\\\${PACKAGE_NAME}\\\\${REGISTRY_ENTRY}\")
else ()
string (STRIP \"\${ERR}\" ERR)
message (STATUS \"Register: Failed to add registry entry: \${ERR}\")
endif ()"
)
elseif (IS_DIRECTORY "$ENV{HOME}")
file (WRITE "${PROJECT_BINARY_DIR}/${PACKAGE_NAME}-registry-entry" "${CONFIG_DIR}")
install (
FILES "${PROJECT_BINARY_DIR}/${PACKAGE_NAME}-registry-entry"
DESTINATION "$ENV{HOME}/.cmake/packages/${PACKAGE_NAME}"
RENAME "${REGISTRY_ENTRY}"
)
endif ()
endfunction ()
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