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cmake: Add macro check_auto_option() as an addition to add_auto_option()

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check_auto_option() checks the values given to an auto-option and prints
a fatal error in case of invalid combinations.
This commit is contained in:
Ralf Habacker 2020-05-18 12:51:03 +02:00 • committed by Simon McVittie
parent ab404c5ffb
commit eb6d4a1439
2 changed files with 22 additions and 3 deletions
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21
cmake/modules/Macros.cmake
View file

@ -212,3 +212,24 @@ macro(add_auto_option _name _text _default)
endif()
set_property(CACHE ${_name} PROPERTY STRINGS AUTO ON OFF)
endmacro()
#
# Ensure that if a tristate ON/OFF/AUTO feature is set to ON,
# its requirements have been met. Fail with a fatal error if not.
#
# _name: name of a variable ENABLE_FOO representing a tristate ON/OFF/AUTO feature
# _text: human-readable description of the feature enabled by _name, for the
# error message
# _var: name of a variable representing a system property we checked for,
# such as an executable that must exist for the feature enabled by _name to work
# _vartext: what we checked for, for the error message
#
macro(check_auto_option _name _text _var _vartext)
set(_nameval ${${_name}})
set(_varval ${${_var}})
#message("debug: _name ${_name} ${_nameval} _var ${_var} ${_varval}")
if(${_nameval} AND NOT ${_nameval} STREQUAL "AUTO" AND NOT ${_varval})
message(FATAL_ERROR "${_text} requested but ${_vartext} not found")
endif()
endmacro()

4
doc/CMakeLists.txt
View file

@ -23,9 +23,7 @@ if(DBUS_ENABLE_DOXYGEN_DOCS)
set(INSTALL_QCH_DIR ${CMAKE_INSTALL_DATADIR}/doc/dbus)
endif()
find_program(QHELPGENERATOR_EXECUTABLE NAMES qhelpgenerator qhelpgenerator-qt5)
if(ENABLE_QT_HELP AND NOT ENABLE_QT_HELP STREQUAL "AUTO" AND NOT QHELPGENERATOR_EXECUTABLE)
message(FATAL_ERROR "Qt help requested but qhelpgenerator not found")
endif()
check_auto_option(ENABLE_QT_HELP "Qt help" QHELPGENERATOR_EXECUTABLE "qhelpgenerator")
if(ENABLE_QT_HELP AND QHELPGENERATOR_EXECUTABLE)
message(STATUS "${QHELPGENERATOR_EXECUTABLE} found")
set(DOXYGEN_GENERATE_QHP YES)