"ld: unknown parameter: -soname" on OS X

Question

I try to create my application with CMake on Mac OS X, I get the following error:

Linking CXX shared library libsml.so ld: unknown option: -soname collect2: ld returned 1 exit status make[2]: *** [libsml.so] Error 1 make[1]: *** [CMakeFiles/sml.dir/all] Error 2 make: *** [all] Error 2 

This is strange because the Mac has the extension .dylib instead of .so.

Here is my CMakeLists.txt:

 cmake_minimum_required(VERSION 2.6) PROJECT (SilentMedia) SET(SourcePath src/libsml) IF (DEFINED OSS) SET(OSS_src ${SourcePath}/Media/Audio/SoundSystem/OSS/DSP/DSP.cpp ${SourcePath}/Media/Audio/SoundSystem/OSS/Mixer/Mixer.cpp ) ENDIF(DEFINED OSS) IF (DEFINED ALSA) SET(ALSA_src ${SourcePath}/Media/Audio/SoundSystem/ALSA/DSP/DSP.cpp ${SourcePath}/Media/Audio/SoundSystem/ALSA/Mixer/Mixer.cpp ) ENDIF(DEFINED ALSA) SET(SilentMedia_src ${SourcePath}/Utils/Base64/Base64.cpp ${SourcePath}/Utils/String/String.cpp ${SourcePath}/Utils/Random/Random.cpp ${SourcePath}/Media/Container/FileLoader.cpp ${SourcePath}/Media/Container/OGG/OGG.cpp ${SourcePath}/Media/PlayList/XSPF/XSPF.cpp ${SourcePath}/Media/PlayList/XSPF/libXSPF.cpp ${SourcePath}/Media/PlayList/PlayList.cpp ${OSS_src} ${ALSA_src} ${SourcePath}/Media/Audio/Audio.cpp ${SourcePath}/Media/Audio/AudioInfo.cpp ${SourcePath}/Media/Audio/AudioProxy.cpp ${SourcePath}/Media/Audio/SoundSystem/SoundSystem.cpp ${SourcePath}/Media/Audio/SoundSystem/libao/AO.cpp ${SourcePath}/Media/Audio/Codec/WAV/WAV.cpp ${SourcePath}/Media/Audio/Codec/Vorbis/Vorbis.cpp ${SourcePath}/Media/Audio/Codec/WavPack/WavPack.cpp ${SourcePath}/Media/Audio/Codec/FLAC/FLAC.cpp ) SET(SilentMedia_LINKED_LIBRARY sml vorbisfile FLAC++ wavpack ao #asound boost_thread-mt boost_filesystem-mt xspf gtest ) INCLUDE_DIRECTORIES( /usr/include /usr/local/include /usr/include/c++/4.4 /Users/alex/Downloads/boost_1_45_0 ${SilentMedia_SOURCE_DIR}/src ${SilentMedia_SOURCE_DIR}/${SourcePath} ) #link_directories( # /usr/lib # /usr/local/lib # /Users/alex/Downloads/boost_1_45_0/stage/lib #) IF(LibraryType STREQUAL "static") ADD_LIBRARY(sml-static STATIC ${SilentMedia_src}) # rename library from libsml-static.a => libsml.a SET_TARGET_PROPERTIES(sml-static PROPERTIES OUTPUT_NAME "sml") SET_TARGET_PROPERTIES(sml-static PROPERTIES CLEAN_DIRECT_OUTPUT 1) ELSEIF(LibraryType STREQUAL "shared") ADD_LIBRARY(sml SHARED ${SilentMedia_src}) # change compile optimization/debug flags # -Werror -pedantic IF(BuildType STREQUAL "Debug") SET_TARGET_PROPERTIES(sml PROPERTIES COMPILE_FLAGS "-pipe -Wall -W -ggdb") ELSEIF(BuildType STREQUAL "Release") SET_TARGET_PROPERTIES(sml PROPERTIES COMPILE_FLAGS "-pipe -Wall -W -O3 -fomit-frame-pointer") ENDIF() SET_TARGET_PROPERTIES(sml PROPERTIES CLEAN_DIRECT_OUTPUT 1) ENDIF() ### TEST ### IF(Test STREQUAL "true") ADD_EXECUTABLE (bin/TestXSPF ${SourcePath}/Test/Media/PlayLists/XSPF/TestXSPF.cpp) TARGET_LINK_LIBRARIES (bin/TestXSPF ${SilentMedia_LINKED_LIBRARY}) ADD_EXECUTABLE (bin/test1 ${SourcePath}/Test/test.cpp) TARGET_LINK_LIBRARIES (bin/test1 ${SilentMedia_LINKED_LIBRARY}) ADD_EXECUTABLE (bin/TestFileLoader ${SourcePath}/Test/Media/Container/FileLoader/TestFileLoader.cpp) TARGET_LINK_LIBRARIES (bin/TestFileLoader ${SilentMedia_LINKED_LIBRARY}) ADD_EXECUTABLE (bin/testMixer ${SourcePath}/Test/testMixer.cpp) TARGET_LINK_LIBRARIES (bin/testMixer ${SilentMedia_LINKED_LIBRARY}) ENDIF (Test STREQUAL "true") ### TEST ### ADD_CUSTOM_TARGET(doc COMMAND doxygen ${SilentMedia_SOURCE_DIR}/doc/Doxyfile) 

There were no errors on Linux.

Build process:

 cmake -D BuildType=Debug -D LibraryType=shared . make 

I found that an invalid command is being generated in CMakeFiles/sml.dir/link.txt . But why, since the goal of CMake is cross-platform.

How to fix it?

Answer 1

Ok, I found where the problem is. Before building, you must delete all temporary folders and CMake files, for example. CMakeFiles , CMakeCache.txt , Makefile . As in my case, the problem was that I built this project on Linux and did not delete these files ... That's why the .so extension ...

Answer 2

I had a similar problem with OS X, which I decided to use instead of soname with install_name .

 gcc -shared <files> -lc -Wl,-install_name,<libname>.so, -o <libname>.so.1 

Answer 3

You cleared that you have problems, but I would like to provide this link for future visitors, because it’s a little more to create a dynamic library on OS X. Also see Creating dynamic libraries on the pages of Apple developers.

OS X does not use the libcoolstuff.so.XYZ . OS X uses the libcoolstuff.X.dylib . To insert XYZ into the library, use -install_name , -current_version and -compatibility_version .

I do not know Cmake, but here is what it looks like under Make. The recipe for creating libcoolstuff 1.0.6 would look like this:

 libcoolstuff libcoolstuff.dylib: $(CC) $(CFLAGS) -dynamiclib -install_name "libcoolstuff.1.dylib" \ -current_version 1.0.6 -compatibility_version 1.0 -o libcoolstuff.1.dylib $(OBJS) 

And your make install rule will look like this:

 PREFIX?=/usr/local LIBDIR?=$(PREFIX)/lib ... install: cp -f libcoolstuff.1.dylib $(LIBDIR)/libcoolstuff.1.dylib rm -f $(LIBDIR)/libcoolstuff.dylib ln -s $(LIBDIR)/libcoolstuff.1.dylib $(LIBDIR)/libcoolstuff.dylib install_name_tool -change "libcoolstuff.1.dylib" "$(LIBDIR)/libcoolstuff.1.dylib" $(LIBDIR)/libcoolstuff.1.dylib 

In otool it looks like this:

 $ otool -L libcoolstuff.dylib libcoolstuff.dylib: libcoolstuff.1.dylib (compatibility version 1.0.0, current version 1.0.6) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.7) 

Finally, you will use it as expected:

 export CFLAGS="-NDEBUG -g2 -O2 -Wall -arch ppc -arch ppc64" make ...