On 10/26/2011 10:28 AM, Andreas Pakulat wrote: > On 26.10.11 03:54:02, Jose wrote: >> Sorry for not being very specific. >> >> This is the command that Cmake is running while linking : >> >> /usr/bin/i686-pc-mingw32-g++ -O3 -O3 -Wl,-Bstatic -static-libgcc >> -Wl,--whole-archive CMakeFiles/sqt2pin.dir/objects.a -Wl,--no-whole-archive >> -o sqt2pin.exe -Wl,--out-implib,libsqt2pin.dll.a >> -Wl,--major-image-version,0,--minor-image-version,0 >> -L/home/fedora/percolator/percolator/src/converters/../../src >> libconverters.a libperclibrary_part.a MSToolkit/libMSToolkit.a >> MSToolkit/RAMP/libRAMP.a -lxerces-c -lportablexdr >> /home/fedora/percolator/percolator/src/converters/libs/dll/libtokyocabinet.a >> -lz -lsqlite3 -Wl,-Bstatic -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 >> -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 >> /usr/lib/gcc/i686-pc-mingw32/4.5.3/../../../../i686-pc-mingw32/bin/ld: >> cannot find -lxerces-c >> /usr/lib/gcc/i686-pc-mingw32/4.5.3/../../../../i686-pc-mingw32/bin/ld: >> cannot find -lportablexdr >> /usr/lib/gcc/i686-pc-mingw32/4.5.3/../../../../i686-pc-mingw32/bin/ld: >> cannot find -lz >> /usr/lib/gcc/i686-pc-mingw32/4.5.3/../../../../i686-pc-mingw32/bin/ld: >> cannot find -lsqlite3 >> >> That is weird cos I "load" all the libraries in the same way and they all >> the variables content the right paths to the libraries : (for example) >> >> Xercesc : /usr/i686-pc-mingw32/sys-root/mingw/lib/libxerces-c.dll.a , XDR : >> /usr/i686-pc-mingw32/sys-root/mingw/lib/libportablexdr.dll.a >> >> This is how I link : >> >> #COMPILING SQT2PIN >> include_directories(. MSToolkit/RAMP MSToolkit ) >> add_executable(sqt2pin Sqt2Pin.cpp ) >> IF(STATIC AND MINGW) >> set_property(TARGET sqt2pin PROPERTY LINK_SEARCH_END_STATIC ON) >> set_target_properties(sqt2pin PROPERTIES LINK_FLAGS "-Wl,-Bstatic >> -static-libgcc") >> ENDIF() >> message(STATUS "Xercesc : ${XERCESC_LIBRARIES} , XDR : >> ${PORTABLEXDR_LIBRARIES}") >> target_link_libraries(sqt2pin converters perclibrary_part MSToolkit RAMP >> ${XERCESC_LIBRARIES} ${PORTABLEXDR_LIBRARIES} ${TOKYOCABINET_LIBRARIES} ) >> >> I might be missing something very stupid because I use the same prodecure >> to search for the librarys....the FindXXX.cmake macros that are tested and >> working with other programs. >> >> Could it be the include_directories("library include dir") which is messing >> this up? it looks like the linker disregard the path of the library that Im >> pasinng and looks for -lxerces-c instead. Is that xerces-c defined somehow >> before? > > This happens if the library is considered to be in a 'system path' since > in that case specifying the path is not necessary for the linker to find > it. However in your specific case it seems like cmake does this even for > static libraries, which is of course wrong. I'd suggest to file a > bugreport for this with a small self-contained example. > > Andreas
The -l switch of ld is not related to the library's type, i.e. shared or static; see ld's manpage and the following example: CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR) PROJECT(STATIC C) SET(CMAKE_VERBOSE_MAKEFILE ON) FILE(WRITE ${CMAKE_BINARY_DIR}/f.c "int f(void){return 0;}\n") EXECUTE_PROCESS(COMMAND ${CMAKE_C_COMPILER} -c f.c) EXECUTE_PROCESS(COMMAND ${CMAKE_AR} cr libf.a f.o) FILE(WRITE ${CMAKE_BINARY_DIR}/main.c "int main(void){return f();}\n") ADD_EXECUTABLE(main main.c) TARGET_LINK_LIBRARIES(main -L${CMAKE_BINARY_DIR} f /usr/lib/libz.a) The executable "main" is linked against the static libf.a via the -l switch. Usually, in particular on ELF systems, ld just prefers shared libraries with -l unless it is told to not do so, e.g. using -Bstatic. However, MinGW's ld behaves differently in this regard; IIRC, it even prefers static and import libraries to shared ones with the -l switch. BTW, /usr/lib/libz.a is converted into -Wl,-Bstatic -lz -Wl,-Bdynamic due to /usr/lib being a system directory, i.e. CMake performs this -l conversion of full paths in system directories for static libraries, too; why should it be called wrong? Jose, could you find out which directories CMake considers as system directories and if these are actually searched implicitly by ld? If CMake takes /usr/i686-pc-mingw32/sys-root/mingw/lib as system dir, thus libxerces-c.dll.a --> -lxerces-c, but ld does not search it without a proper -L switch, the issue would be quite clear. As a quick workaround, you might use imported targets for the concerned libraries to avoid the -l conversion, i.e.: ADD_LIBRARY(xerces-c STATIC IMPORTED) SET_TARGET_PROPERTIES(xerces-c PROPERTIES IMPORTED_LOCATION /usr/i686-pc-mingw32/sys-root/mingw/lib/libxerces-c.dll.a) TARGET_LINK_LIBRARIES(... xerces-c ...) 'hope that helps. Regards, Michael -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake