Commit 3c18e436cddc123347a9dedbb8e71346a26ecd05 makes it impossible to
build LMMS with embedded ZynAddSubFX if "-Wl,--as-needed" is used in
LINKER_FLAGS during the link step of RemoteZynAddSubFx:
Linking CXX executable RemoteZynAddSubFx
libZynAddSubFxCore.so: undefined reference to `fftwf_plan_r2r_1d'
libZynAddSubFxCore.so: undefined reference to `fftwf_execute'
libZynAddSubFxCore.so: undefined reference to `fftwf_destroy_plan'
This happens because fftw3f, which is a system lib, is linked to before
the ZASF core libs when linking RemoteZynAddSubFx. With "--as-needed",
correct library order matters. I am attaching the (trivial) patch to
fix the issue.
diff -Naur lmms/plugins/zynaddsubfx/CMakeLists.txt lmms-new/plugins/zynaddsubfx/CMakeLists.txt
--- lmms/plugins/zynaddsubfx/CMakeLists.txt 2009-09-18 20:35:30.133819883 +0300
+++ lmms-new/plugins/zynaddsubfx/CMakeLists.txt 2009-09-18 20:38:41.813820308 +0300
@@ -90,7 +90,7 @@
add_subdirectory(src/Samples)
ADD_LIBRARY(ZynAddSubFxCore SHARED LocalZynAddSubFx.cpp ${MXML_SRC})
-TARGET_LINK_LIBRARIES(ZynAddSubFxCore ${FFTW3F_LIBRARIES} ${ZASF_CORE_LIBS} -lz -lpthread)
+TARGET_LINK_LIBRARIES(ZynAddSubFxCore ${ZASF_CORE_LIBS} ${FFTW3F_LIBRARIES} -lz -lpthread)
IF(LMMS_BUILD_WIN32)
TARGET_LINK_LIBRARIES(ZynAddSubFxCore -lwsock32)
INSTALL(TARGETS ZynAddSubFxCore DESTINATION ${PLUGIN_DIR})
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