have_library: checking for jit_init() in -ljit... -------------------- yes

"gcc -o conftest -I. -I/usr/local/lib/ruby/1.8/i686-linux -I.  -g -O2 conftest.c  -L'/usr/local/lib' -Wl,-R'/usr/local/lib'  -rdynamic -Wl,-export-dynamic     -lruby-static -ljit  -ldl -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:3: error: 'jit_init' undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))jit_init; return 0; }
/* end */

"gcc -o conftest -I. -I/usr/local/lib/ruby/1.8/i686-linux -I.  -g -O2 conftest.c  -L'/usr/local/lib' -Wl,-R'/usr/local/lib'  -rdynamic -Wl,-export-dynamic     -lruby-static -ljit  -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { jit_init(); return 0; }
/* end */

--------------------