AC_CHECK_LIB(foo, main, ...

[Bob Friesenhahn]

Libtool's libtool.m4 contains a number of tests similar to

AC_CHECK_LIB(m, main, LIBM="$LIBM -lm")

I assume that this is intended to simply verify that the library
exists by linking against it, but not actually testing for a function.
The test program produced looks like:

int
main ()
{
main ();
  ;
  return 0;
}

Unfortunately, I am informed that both SUN's CC and SGI's CC warn
about the recursive call to main(), and the tests fail.  It seems that
this is a poor shorthand to use.  A more reliable means would be to
test a function which is known to exist in the library being tested.

Bob
======================================
Bob Friesenhahn
address@hidden
http://www.simplesystems.org/users/bfriesen