109 lines
3.9 KiB
CMake
109 lines
3.9 KiB
CMake
# Macros to check if a library needs to be manually linked to another one
|
|
# because it's using a symbol from it but it's not linked to
|
|
|
|
# CHECK_UNDEFINED_SYMBOL
|
|
# Macro to check if a library is calling an undefined symbol
|
|
#
|
|
# Syntax:
|
|
# CHECK_UNDEFINED_SYMBOL(MYLIBRARY SYMBOL SYMBOL_FOUND)
|
|
# SYMBOL_FOUND will be set to TRUE or FALSE
|
|
#
|
|
# Example:
|
|
# CHECK_UNDEFINED_SYMBOL(PNG_LIBRARY inflate INFLATE_FOUND)
|
|
#
|
|
MACRO(CHECK_UNDEFINED_SYMBOL MYLIBRARY SYMBOL SYMBOL_FOUND)
|
|
SET(${SYMBOL_FOUND} TRUE)
|
|
IF(WIN32)
|
|
# Always TRUE under Windows because we are using static libraries
|
|
ELSEIF(APPLE)
|
|
# TODO: use otool to detect if a library is using a symbol
|
|
ELSEIF(UNIX)
|
|
IF(CMAKE_OBJDUMP)
|
|
# Use objdump to check if a library is using an external symbol
|
|
EXEC_PROGRAM(${CMAKE_OBJDUMP} ARGS "-T ${${MYLIBRARY}} | grep ${SYMBOL}" OUTPUT_VARIABLE OBJDUMP_SYMBOL)
|
|
IF(NOT OBJDUMP_SYMBOL MATCHES "UND")
|
|
SET(${SYMBOL_FOUND} FALSE)
|
|
ENDIF(NOT OBJDUMP_SYMBOL MATCHES "UND")
|
|
ENDIF(CMAKE_OBJDUMP)
|
|
ENDIF(WIN32)
|
|
ENDMACRO(CHECK_UNDEFINED_SYMBOL)
|
|
|
|
# CHECK_LINKED_LIBRARY
|
|
# Macro to check if a library is linked to another one
|
|
#
|
|
# Syntax:
|
|
# CHECK_LINKED_LIBRARY(MYLIBRARY OTHERLIBRARY LIBRARY_FOUND)
|
|
# LIBRARY_FOUND will be set to TRUE or FALSE
|
|
#
|
|
# Example:
|
|
# CHECK_LINKED_LIBRARY(PNG_LIBRARY ZLIB_LIBRARY ZLIB_FOUND)
|
|
#
|
|
MACRO(CHECK_LINKED_LIBRARY MYLIBRARY OTHERLIBRARY LIBRARY_FOUND)
|
|
SET(${LIBRARY_FOUND} FALSE)
|
|
IF(WIN32)
|
|
# Always FALSE under Windows because we are using static libraries
|
|
ELSEIF(APPLE)
|
|
# TODO: use otool to detect if a library is using a symbol
|
|
ELSEIF(UNIX)
|
|
IF(CMAKE_OBJDUMP)
|
|
GET_FILENAME_COMPONENT(LIBNAME ${${OTHERLIBRARY}} NAME)
|
|
# Use objdump to check if a library is linked to another library
|
|
EXEC_PROGRAM(${CMAKE_OBJDUMP} ARGS "-p ${${MYLIBRARY}} | grep ${LIBNAME}" OUTPUT_VARIABLE OBJDUMP_LIBRARY)
|
|
IF(OBJDUMP_LIBRARY MATCHES "NEEDED")
|
|
SET(${LIBRARY_FOUND} TRUE)
|
|
ENDIF(OBJDUMP_LIBRARY MATCHES "NEEDED")
|
|
ENDIF(CMAKE_OBJDUMP)
|
|
ENDIF(WIN32)
|
|
ENDMACRO(CHECK_LINKED_LIBRARY)
|
|
|
|
MACRO(CHECK_DEPENDS MYLIBRARY OTHERLIBRARY SYMBOL MUSTLINK)
|
|
CHECK_UNDEFINED_SYMBOL(MYLIBRARY SYMBOL SYMBOL_FOUND)
|
|
|
|
IF(SYMBOL_FOUND)
|
|
CHECK_LINKED_LIBRARY(MYLIBRARY OTHERLIBRARY LIBRARY_FOUND)
|
|
ENDIF(SYMBOL_FOUND)
|
|
|
|
IF(SYMBOL_FOUND AND NOT LIBRARY_FOUND)
|
|
SET(${MUSTLINK} YES)
|
|
ELSE(SYMBOL_FOUND AND NOT LIBRARY_FOUND)
|
|
SET(${MUSTLINK} NO)
|
|
ENDIF(SYMBOL_FOUND AND NOT LIBRARY_FOUND)
|
|
ENDMACRO(CHECK_DEPENDS)
|
|
|
|
# LINK_DEPENDS
|
|
# Macro to link a library if a symbol is used but is not already linked to it
|
|
#
|
|
# Syntax:
|
|
# LINK_DEPENDS(LIBRARIES MYLIBRARY OTHERLIBRARY SYMBOL)
|
|
# OTHERLIBRARY_LINKED will be set to TRUE or FALSE
|
|
#
|
|
# Example:
|
|
# LINK_DEPENDS(PNG_LIBRARIES PNG_LIBRARY ZLIB_LIBRARY inflate)
|
|
#
|
|
MACRO(LINK_DEPENDS LIBRARIES MYLIBRARY OTHERLIBRARY SYMBOL)
|
|
SET(MUST_LINK FALSE)
|
|
IF(${MYLIBRARY} AND ${OTHERLIBRARY} AND NOT ${OTHERLIBRARY}_LINKED)
|
|
IF(WIN32 OR WITH_STATIC)
|
|
# In static, we link all libraries because it will keep only used symbols
|
|
SET(MUST_LINK TRUE)
|
|
ELSE(WIN32 OR WITH_STATIC)
|
|
CHECK_UNDEFINED_SYMBOL(${MYLIBRARY} ${SYMBOL} SYMBOL_FOUND)
|
|
|
|
IF(SYMBOL_FOUND)
|
|
CHECK_LINKED_LIBRARY(${MYLIBRARY} ${OTHERLIBRARY} LIBRARY_FOUND)
|
|
ENDIF(SYMBOL_FOUND)
|
|
|
|
IF(SYMBOL_FOUND AND NOT LIBRARY_FOUND)
|
|
MESSAGE(STATUS "Underlinking found: ${${MYLIBRARY}} needs ${${OTHERLIBRARY}} but is not linked to, manually linking...")
|
|
SET(MUST_LINK TRUE)
|
|
ENDIF(SYMBOL_FOUND AND NOT LIBRARY_FOUND)
|
|
ENDIF(WIN32 OR WITH_STATIC)
|
|
ENDIF(${MYLIBRARY} AND ${OTHERLIBRARY} AND NOT ${OTHERLIBRARY}_LINKED)
|
|
IF(MUST_LINK)
|
|
MESSAGE(STATUS "Linking with ${${OTHERLIBRARY}}")
|
|
SET(${LIBRARIES} ${${LIBRARIES}} ${${OTHERLIBRARY}})
|
|
ENDIF(MUST_LINK)
|
|
IF(LIBRARY_FOUND)
|
|
SET(${OTHERLIBRARY}_LINKED TRUE)
|
|
ENDIF(LIBRARY_FOUND)
|
|
ENDMACRO(LINK_DEPENDS)
|