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Diffstat (limited to '3rdparty/cmake/FindFunctionLibrary.cmake')
| -rw-r--r-- | 3rdparty/cmake/FindFunctionLibrary.cmake | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/3rdparty/cmake/FindFunctionLibrary.cmake b/3rdparty/cmake/FindFunctionLibrary.cmake new file mode 100644 index 000000000..f1d32001e --- /dev/null +++ b/3rdparty/cmake/FindFunctionLibrary.cmake @@ -0,0 +1,47 @@ +# - Check which library is needed to link a C function +# find_function_library( <function> <variable> [<library> ...] ) +# +# Check which library provides the <function>. +# Sets <variable> to 0 if found in the global libraries. +# Sets <variable> to the library path if found in the provided libraries. +# Raises a FATAL_ERROR if not found. +# +# 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_INCLUDES = list of include directories +# CMAKE_REQUIRED_LIBRARIES = list of libraries to link +include( CheckFunctionExists ) + +macro( find_function_library FUNC VAR ) + if( "${VAR}" MATCHES "^${VAR}$" ) + CHECK_FUNCTION_EXISTS( ${FUNC} ${VAR} ) + if( ${VAR} ) + message( STATUS "Found ${FUNC} in global libraries" ) + set( ${VAR} 0 CACHE INTERNAL "Found ${FUNC} in global libraries" )# global + else() + foreach( LIB IN ITEMS ${ARGN} ) + message( STATUS "Looking for ${FUNC} in ${LIB}" ) + find_library( ${LIB}_LIBRARY ${LIB} ) + mark_as_advanced( ${LIB}_LIBRARY ) + if( ${LIB}_LIBRARY ) + unset( ${VAR} CACHE ) + set( CMAKE_REQUIRED_LIBRARIES ${${LIB}_LIBRARY} ) + CHECK_FUNCTION_EXISTS( ${FUNC} ${VAR} ) + set( CMAKE_REQUIRED_LIBRARIES ) + if( ${VAR} ) + message( STATUS "Found ${FUNC} in ${LIB}: ${${LIB}_LIBRARY}" ) + set( ${VAR} ${${LIB}_LIBRARY} CACHE INTERNAL "Found ${FUNC} in ${LIB}" )# lib + break() + endif() + endif() + endforeach() + if( NOT ${VAR} ) + message( FATAL_ERROR "Function ${FUNC} not found" ) + endif() + endif() + endif() +endmacro( find_function_library ) + |