diff options
Diffstat (limited to 'Modules/CheckVariableExists.cmake')
| -rw-r--r-- | Modules/CheckVariableExists.cmake | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/Modules/CheckVariableExists.cmake b/Modules/CheckVariableExists.cmake index 97413f4..2b0bdab 100644 --- a/Modules/CheckVariableExists.cmake +++ b/Modules/CheckVariableExists.cmake @@ -3,23 +3,31 @@ # # VAR - the name of the variable # VARIABLE - variable to store the result -# If CMAKE_REQUIRED_FLAGS is set then those flags will be passed into the -# compile of the program likewise if CMAKE_REQUIRED_LIBRARIES is set then -# those libraries will be linked against the test program. +# # This macro is only for C variables. # +# The following variables may be set before calling this macro to +# modify the way the check is run: +# +# CMAKE_REQUIRED_FLAGS = string of compile command line flags +# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar) +# CMAKE_REQUIRED_LIBRARIES = list of libraries to link + MACRO(CHECK_VARIABLE_EXISTS VAR VARIABLE) IF("${VARIABLE}" MATCHES "^${VARIABLE}$") SET(MACRO_CHECK_VARIABLE_DEFINITIONS "-DCHECK_VARIABLE_EXISTS=${VAR} ${CMAKE_REQUIRED_FLAGS}") MESSAGE(STATUS "Looking for ${VAR}") IF(CMAKE_REQUIRED_LIBRARIES) - SET(CHECK_VARIABLE_EXISTS_ADD_LIBRARIES + SET(CHECK_VARIABLE_EXISTS_ADD_LIBRARIES "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}") + ELSE(CMAKE_REQUIRED_LIBRARIES) + SET(CHECK_VARIABLE_EXISTS_ADD_LIBRARIES) ENDIF(CMAKE_REQUIRED_LIBRARIES) TRY_COMPILE(${VARIABLE} ${CMAKE_BINARY_DIR} ${CMAKE_ROOT}/Modules/CheckVariableExists.c + COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_VARIABLE_DEFINITIONS} "${CHECK_VARIABLE_EXISTS_ADD_LIBRARIES}" OUTPUT_VARIABLE OUTPUT) |