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On Linux, support -Wl,--no-undefined (only client shared library)

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and --Wl,--as-needed (all shared modules). The later will remove
unused dependencies (also from gcc and C++ runtime)
This commit is contained in:
Vladislav Vaintroub
2009-12-07 02:16:05 +01:00
parent 555c99c8eb
commit a1ebd4245e
8 changed files with 96 additions and 60 deletions
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31
cmake/libutils.cmake
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@ -132,25 +132,31 @@ MACRO(MERGE_STATIC_LIBS TARGET OUTPUT_NAME LIBS_TO_MERGE)
ADD_LIBRARY(${TARGET} STATIC ${SOURCE_FILE})
SET_TARGET_PROPERTIES(${TARGET} PROPERTIES OUTPUT_NAME ${OUTPUT_NAME})
SET(OSLIBS)
FOREACH(LIB ${LIBS_TO_MERGE})
GET_TARGET_PROPERTY(LIB_LOCATION ${LIB} LOCATION)
GET_TARGET_PROPERTY(LIB_TYPE ${LIB} TYPE)
IF(NOT LIB_LOCATION)
# 3rd party library like libz.so. Make sure that everything
# that links to our library links to this one as well.
TARGET_LINK_LIBRARIES(${TARGET} ${LIB})
LIST(APPEND OSLIBS ${LIB})
ELSE()
# This is a target in current project
# (can be a static or shared lib)
IF(LIB_TYPE STREQUAL "STATIC_LIBRARY")
SET(STATIC_LIBS ${STATIC_LIBS} ${LIB_LOCATION})
ADD_DEPENDENCIES(${TARGET} ${LIB})
# Extract dependend OS libraries
GET_DEPENDEND_OS_LIBS(${LIB} LIB_OSLIBS)
LIST(APPEND OSLIBS ${LIB_OSLIBS})
ELSE()
# This is a shared library our static lib depends on.
TARGET_LINK_LIBRARIES(${TARGET} ${LIB})
LIST(APPEND OSLIBS ${LIB})
ENDIF()
ENDIF()
ENDFOREACH()
LIST(REMOVE_DUPLICATES OSLIBS)
TARGET_LINK_LIBRARIES(${TARGET} ${OSLIBS})
# Make the generated dummy source file depended on all static input
# libs. If input lib changes,the source file is touched
@ -249,16 +255,27 @@ MACRO(MERGE_LIBRARIES)
IF(ARG_OUTPUT_NAME)
SET_TARGET_PROPERTIES(${TARGET} PROPERTIES OUTPUT_NAME "${ARG_OUTPUT_NAME}")
ENDIF()
# Disallow undefined symbols in shared libraries, but allow for modules
# (they export from loading executable)
IF(LIBTYPE MATCHES "SHARED" AND CMAKE_SYSTEM_TYPE MATCHES "Linux")
SET_TARGET_PROPERTIES(${TARGET} PROPERTIES LINK_FLAGS "-Wl,--no-undefined")
ENDIF()
ELSE()
MESSAGE(FATAL_ERROR "Unknown library type")
ENDIF()
ENDMACRO()
FUNCTION(GET_DEPENDEND_OS_LIBS target result)
SET(deps ${${target}_LIB_DEPENDS})
IF(deps)
FOREACH(lib ${deps})
# Filter out keywords for used for debug vs optimized builds
IF(NOT lib MATCHES "general" AND NOT lib MATCHES "debug" AND NOT lib MATCHES "optimized")
GET_TARGET_PROPERTY(lib_location ${lib} LOCATION)
IF(NOT lib_location)
SET(ret ${ret} ${lib})
ENDIF()
ENDIF()
ENDFOREACH()
ENDIF()
SET(${result} ${ret} PARENT_SCOPE)
ENDFUNCTION()
MACRO(RESTRICT_SYMBOL_EXPORTS target)
IF(CMAKE_COMPILER_IS_GNUCXX AND UNIX)
GET_TARGET_PROPERTY(COMPILE_FLAGS ${target} COMPILE_FLAGS)