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[libpng15] Fixed CMakelists.txt to allow building a single variant of the

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library (Claudio Bley):
  Introduced a PNG_LIB_TARGETS variable that lists all activated library
    targets.  It is an error if this variable ends up empty, ie. you have
    to build at least one library variant.
  Made the *_COPY targets only depend on library targets actually being build.
  Use PNG_LIB_TARGETS to unify a code path.
This commit is contained in:
Claudio Bley
2013-03-07 11:01:35 -06:00
committed by Glenn Randers-Pehrson
parent aad05aa948
commit 5d10f7c5f1
3 changed files with 34 additions and 14 deletions
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28
CMakeLists.txt
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@@ -138,8 +138,11 @@ endif()
# NOW BUILD OUR TARGET
include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR})
unset(PNG_LIB_TARGETS)
if(PNG_SHARED)
add_library(${PNG_LIB_NAME} SHARED ${libpng_sources})
set(PNG_LIB_TARGETS ${PNG_LIB_NAME})
if(MSVC)
# msvc does not append 'lib' - do it here to have consistent name
set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib")
@@ -152,6 +155,7 @@ if(PNG_STATIC)
# does not work without changing name
set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static)
add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources})
list(APPEND PNG_LIB_TARGETS ${PNG_LIB_NAME_STATIC})
if(MSVC)
# msvc does not append 'lib' - do it here to have consistent name
set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib")
@@ -159,6 +163,12 @@ if(PNG_STATIC)
target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY})
endif()
if(NOT PNG_LIB_TARGETS)
message(SEND_ERROR
"No library variant selected to build. "
"Please enable at least one of the following options: PNG_STATIC, PNG_SHARED")
endif()
if(PNG_SHARED AND WIN32)
set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL)
endif()
@@ -189,7 +199,7 @@ macro(CREATE_SYMLINK SRC_FILE DEST_FILE)
OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}
COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
DEPENDS ${PNG_LIB_NAME} ${PNG_LIB_NAME_STATIC}
DEPENDS ${PNG_LIB_TARGETS}
)
ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
else(WIN32 AND NOT CYGWIN AND NOT MSYS)
@@ -252,13 +262,13 @@ endif()
# INSTALL
if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
if(PNG_SHARED)
install(TARGETS ${PNG_LIB_NAME}
${PNG_EXPORT_RULE}
RUNTIME DESTINATION bin
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
install(TARGETS ${PNG_LIB_TARGETS}
${PNG_EXPORT_RULE}
RUNTIME DESTINATION bin
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
if(PNG_SHARED)
# Create a symlink for libpng.dll.a => libpng15.dll.a on Cygwin
if(CYGWIN OR MINGW)
get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
@@ -278,10 +288,6 @@ if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
endif(PNG_SHARED)
if(PNG_STATIC)
install(TARGETS ${PNG_LIB_NAME_STATIC}
${PNG_EXPORT_RULE}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
if(NOT WIN32 OR CYGWIN OR MINGW)
get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME_STATIC} LOCATION_${CMAKE_BUILD_TYPE})
get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME)