error in compiling SDL code using gcc
 

Hello all,

I'm a newbie with linux and I'm getting an error when I try to compile my SDL program with gcc. Here's the command line I'm using to compile it:

$ gcc -o comp fosdl9_3.c -lSDL_ttf -lSDL -I/usr/include/SDL -I/usr/local/include/SDL

And here is the error message it's giving me:

/usr/bin/ld: /tmp/ccr3zqbS.o: undefined reference to symbol 'sin@@GLIBC_2.0'
/usr/bin/ld: not: 'sin@@GLIBC_2.0' is defined in DSO /lib/libm.so.6 so try adding it to the linker command line
/lib/libm.so.6: could not read symbols: Invalid operation
collect2: ld returned 1 exit status

I'm assuming this means I have to add "libm.so.6 to the compile command line, but I'm not sure how to do that. Any help or advice would be greatly appreciated!

Thanks in advance!

Try

Thanks for that suggestion it worked for me. I had the same problem when I was trying to make a package for cwstation - a morse code sound generator (http://cwstation.sourceforge.net/).

src2pkg aborted without giving any useful error messages. So I made a slackbuild script and when I ran it, I got the same error message as in the OP. The problem was to include the "-lm" without patching the Makefile or config file.

The solution was to modify cwstation.SlackBuild as follows:

More generally, if ld is spitting out "undefined reference to symbol 'foo'" "'foo' is defined in DSO 'libbar.so'", you want to add -lbar to your linking options, assuming the library actually exists.