----- Original Message ----- From: "Brian Dessent" <brian@dessent.net> . . >> If I can successfully run 'gcc script.c' (where 'script.c' contains a >> call >> to 'sqrtl') then I'm inclined to say that sqrtl is "available in the C >> compiler" (or something like that). >> But you can't. That command should fail on Cygwin. It certainly works for me for 'sqrtl' (but fails for 'frexpl' with "undefined reference to `_frexpl'"): -------------------------------------- Rob@desktop2 ~/C $ cat script.c #include <stdio.h> int main(void) { long double x = sqrtl(7); printf("%.19Lf\n", x); return 0; } Rob@desktop2 ~/C $ gcc script.c Rob@desktop2 ~/C $ ./a.exe 2.6457513110645905904 Rob@desktop2 ~/C -------------------------------------- [Snip - a most helpful explanation of where libc and newlib fit into the picture, and of other aspects that I was finding confusing. Thanks for that Brian ... much appreciated.] Cheers, Rob -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/