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optionally set a minimum required version

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svn path=/trunk/KDE/kdegraphics/cmake/modules/; revision=747373
This commit is contained in:
Pino Toscano 2007-12-11 20:38:08 +00:00
parent 0f8848077e
commit 54e1a2b168
1 changed files with 34 additions and 2 deletions
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36
cmake/modules/FindLIBGS.cmake
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@ -11,6 +11,7 @@
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
include(CheckLibraryExists)
include(CheckCSourceRuns)
if (LIBGS_LIBRARY)
# in cache already
@ -32,13 +33,44 @@ else (LIBGS_LIBRARY)
endif(LIBGS_LIBRARY)
set(CMAKE_LIBRARY_PATH)
if (LIBGS_MINIMUM_VERSION)
string(REPLACE "." "" mingsver "${LIBGS_MINIMUM_VERSION}")
set(CMAKE_REQUIRED_LIBRARIES "${LIBGS_LIBRARY}")
set(CMAKE_REQUIRED_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/spectre/libspectre")
check_c_source_runs("
#include <ghostscript/iapi.h>
int main(int argc, char **argv)
{
gsapi_revision_t gsrev;
if (gsapi_revision(&gsrev, sizeof(gsrev)) != 0)
return 1;
if (gsrev.revision < ${mingsver})
return 1;
return 0;
}
" HAVE_LIBGS_MINIMUM_VERSION)
set(CMAKE_REQUIRED_LIBRARIES)
if (NOT HAVE_LIBGS_MINIMUM_VERSION)
set(LIBGS_FOUND FALSE)
endif (NOT HAVE_LIBGS_MINIMUM_VERSION)
endif (LIBGS_MINIMUM_VERSION)
if (LIBGS_MINIMUM_VERSION)
set(gsLibraryMessage " (v${LIBGS_MINIMUM_VERSION})")
else (LIBGS_MINIMUM_VERSION)
set(gsLibraryMessage "")
endif (LIBGS_MINIMUM_VERSION)
if (LIBGS_FOUND)
if (NOT LIBGS_FIND_QUIETLY)
message(STATUS "Found the GS library: ${LIBGS_LIBRARY}")
message(STATUS "Found the GS library${gsLibraryMessage}: ${LIBGS_LIBRARY}")
endif (NOT LIBGS_FIND_QUIETLY)
else (LIBGS_FOUND)
if (LIBGS_FIND_REQUIRED)
message(FATAL_ERROR "Could NOT find the GS library")
message(FATAL_ERROR "Could NOT find the GS library${gsLibraryMessage}")
endif (LIBGS_FIND_REQUIRED)
endif (LIBGS_FOUND)