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FindBZip2: Check BZIP2_NEED_PREFIX with real prototype 

Run our check for the '_' prefix using a bzip2 API function as declared
with a prototype in the real header file.  This is needed in case the
function is provided in a DLL import library where the symbol name may
not match without proper markup from the header.
This commit is contained in:
Ralf Habacker 2015-07-21 18:10:16 +02:00 committed by Brad King
parent 265b9db7c2
commit 23876eda9f
1 changed files with 4 additions and 2 deletions
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6
Modules/FindBZip2.cmake
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@ -56,11 +56,13 @@ FIND_PACKAGE_HANDLE_STANDARD_ARGS(BZip2
VERSION_VAR BZIP2_VERSION_STRING)
if (BZIP2_FOUND)
include(${CMAKE_CURRENT_LIST_DIR}/CheckLibraryExists.cmake)
include(${CMAKE_CURRENT_LIST_DIR}/CheckSymbolExists.cmake)
include(${CMAKE_CURRENT_LIST_DIR}/CMakePushCheckState.cmake)
cmake_push_check_state()
set(CMAKE_REQUIRED_QUIET ${BZip2_FIND_QUIETLY})
CHECK_LIBRARY_EXISTS("${BZIP2_LIBRARIES}" BZ2_bzCompressInit "" BZIP2_NEED_PREFIX)
set(CMAKE_REQUIRED_INCLUDES ${BZIP2_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${BZIP2_LIBRARIES})
CHECK_SYMBOL_EXISTS(BZ2_bzCompressInit "bzlib.h" BZIP2_NEED_PREFIX)
cmake_pop_check_state()
endif ()