On 31 July 2015 at 08:52, Thomas Dineen wrote: > Gentle People: > > I am getting the following link errors on these fairly trivial programs. > Please note the the code compiles and links perfectly on Solaris with gcc > with no linking command line options. > > Am I missing a -l library command line option? > > I will post the source on request. > > In what libraries are the symbols sprintf_s and WinMain@16 found? > So exactly what do I add to the command line? > > These errors seem quite strange to me in that usually google will tell > you > what library the symbol is in and then you just add -llib to the command > line? > > Please help I have spent hours on google have ended up exhausted and > confused! > Written at 12:51 AM! > > i686-pc-mingw32-gcc Test_Shared.c dlfcn.c -lpsapi -o Test_Shared.exe > > /tmp/ccJEa2nO.o:dlfcn.c:(.text+0x2fb): undefined reference to `sprintf_s' > and WinMain@16 > collect2: error: ld returned 1 exit status sprintf_s should be provided by the mingw runtime, I don't know about WinMain@16 (have you written a main() function?) I suggest you ask somewhere focusesd on mingw, because finding the right libraries to link to is not really a GCC problem. > i686-pc-mingw32-gcc dlfcn.c -lpsapi -o dlfcn.o > > /tmp/cc6fCJ7Q.o:dlfcn.c:(.text+0x2fb): undefined reference to `sprintf_s' > /home/tdineen/Mxe_Cross_Environment_120213/mxe/usr/lib/gcc/i686-pc-mingw32/4.8.1/../../../../i686-pc-mingw32/lib/libmingw32.a(main.o):main.c:(.text.startup+0xa7): > undefined reference to `WinMain@16' > collect2: error: ld returned 1 exit status > Linux3% If you're trying to compile (not link a complete executable) to produce a .o file you need to use -c > i686-pc-mingw32-gcc Test_Lib.c -o Test_Lib.so > > /home/tdineen/Mxe_Cross_Environment_120213/mxe/usr/lib/gcc/i686-pc-mingw32/4.8.1/../../../../i686-pc-mingw32/lib/libmingw32.a(main.o):main.c:(.text.startup+0xa7): > undefined reference to `WinMain@16' > collect2: error: ld returned 1 exit status If you're trying to create a shared library (not link a complete executable) you need to use -shared
