Hi all, This is such a basic problem I must be doing something daft. I have a set of static libraries which I am linking into a dll. None of the external references seem to be getting resolved. This is on Win7 and I have MinGW and msys installed using the msys make. I am using Eclipse CDT but get the same result from the command line. Here is the start of the build to which I added the -v flag, but it still didn't help me. I know this set of libraries builds into a shared library ok because I have done so using Python distutils. However, this time its not Python at the top end so I can't use that. Any help would be very much appreciated. Regards Bob C:\LibSDR\src\c\stPlugin\Release>make all Building target: libstPlugin.dll Invoking: MinGW C Linker gcc -v -s -L"C:\libs\fftw" -L"C:\libs\libusb-win32-device-bin-0.1.12.2\lib\gcc" -L"C:\libs\pthreads\Pre-built.2\lib" -L" C:\LibSDR\src\c\Utils\Release" -L"C:\LibSDR\src\c\RingBuffer\Debug" -L"C:\LibSDR\src\c\Dsp\Release" -L"C:\LibSDR\src\c\O zyDriver\Release" -L"C:\LibSDR\src\c\SdrMain\Release" -shared -o"libstPlugin.dll" ./SDRLibPlugin.o -lfftw3f-3 -lpthre adGC2 -lusb -lUtils -lRingBuffer -lDsp -lozydrv -lSdrMain Reading specs from c:/MinGW/bin/../lib/gcc/mingw32/3.4.5/specs Configured with: ../gcc-3.4.5-20060117-3/configure --with-gcc --with-gnu-ld --with-gnu-as --host=mingw32 --target=mingw3 2 --prefix=/mingw --enable-threads --disable-nls --enable-languages=c,c++,f77,ada,objc,java --disable-win32-registry --d isable-shared --enable-sjlj-exceptions --enable-libgcj --disable-java-awt --without-x --enable-java-gc=boehm --disable-l ibgcj-debug --enable-interpreter --enable-hash-synchronization --enable-libstdcxx-debug Thread model: win32 gcc version 3.4.5 (mingw-vista special r3) c:/MinGW/bin/../libexec/gcc/mingw32/3.4.5/collect2.exe --shared -Bdynamic -e _DllMainCRTStartup@12 --enable-auto-image- base -olibstPlugin.dll -s /mingw/lib/dllcrt2.o c:/MinGW/bin/../lib/gcc/mingw32/3.4.5/crtbegin.o -LC:\libs\fftw -LC:\libs \libusb-win32-device-bin-0.1.12.2\lib\gcc -LC:\libs\pthreads\Pre-built.2\lib -LC:\LibSDR\src\c\Utils\Release -LC:\LibSDR \src\c\RingBuffer\Debug -LC:\LibSDR\src\c\Dsp\Release -LC:\LibSDR\src\c\OzyDriver\Release -LC:\LibSDR\src\c\SdrMain\Rele ase -Lc:/MinGW/bin/../lib/gcc/mingw32/3.4.5 -Lc:/MinGW/bin/../lib/gcc -L/mingw/lib/gcc/mingw32/3.4.5 -Lc:/MinGW/bin/../l ib/gcc/mingw32/3.4.5/../../../../mingw32/lib -L/mingw/lib/gcc/mingw32/3.4.5/../../../../mingw32/lib -L/mingw/lib -Lc:/Mi nGW/bin/../lib/gcc/mingw32/3.4.5/../../.. -L/mingw/lib/gcc/mingw32/3.4.5/../../.. ./SDRLibPlugin.o -lfftw3f-3 -lpthreadG C2 -lusb -lUtils -lRingBuffer -lDsp -lozydrv -lSdrMain -lmingw32 -lgcc -lmoldname -lmingwex -lmsvcrt -luser32 -lkernel32 -ladvapi32 -lshell32 -lmingw32 -lgcc -lmoldname -lmingwex -lmsvcrt c:/MinGW/bin/../lib/gcc/mingw32/3.4.5/crtend.o C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x14): undefined reference to `ringb_float_cre ate' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x25): undefined reference to `ringb_float_cre ate' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x48): undefined reference to `safealloc' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x6b): undefined reference to `safealloc' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x8e): undefined reference to `safealloc' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0xb1): undefined reference to `safealloc' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0xd4): undefined reference to `safealloc' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0xf7): more undefined references to `safealloc ' follow C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x22f): undefined reference to `ringb_float_wr ite_space' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x257): undefined reference to `ringb_float_wr ite' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x288): undefined reference to `ringb_float_re ad_space' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x2cf): undefined reference to `ringb_float_re ad' C:\LibSDR\src\c\OzyDriver\Release/libozydrv.a(ozy_usb.o):ozy_usb.c:(.text+0x2f1): undefined reference to `_imp__pthread_ mutex_lock' etc etc.
