have_library: checking for main() in -lFLAC... -------------------- yes

"i686-pc-linux-gnu-gcc -o conftest -I. -I/usr/lib/ruby/1.8/i686-linux -I.  -O2 -march=athlon-xp -m3dnow -msse -mfpmath=sse -mmmx -pipe -fno-strict-aliasing  -fPIC -Wall conftest.c  -L'.' -L'/usr/lib' -Wl,-R'/usr/lib' -L.  -rdynamic -Wl,-export-dynamic     -lruby18-static -lFLAC  -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))main; return 0; }
/* end */

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