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

"/usr/bin/gcc-4.2 -o conftest -I. -I/opt/local/lib/ruby/1.8/powerpc-darwin9 -I. -I/opt/local/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  -I/opt/local/include -pipe -Os -arch ppc  -fno-common -pipe -fno-common   conftest.c  -L. -L/opt/local/lib -L/opt/local/lib -L. -L/opt/local/lib -Wl,-headerpad_max_install_names -arch ppc  -arch ppc   -lruby-static -lc  -lpthread -ldl -lobjc  "
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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