> hi： > I have a configure.ac file includes: AC_CHECK_LIB([m], [ceil]) > then I got this result: checking for ceil in -lm... no > but a .c file contains ceil function works very well with or without -lm, > why is that? > > libtool version: 2.4.2 > system： Ubuntu 13.04
Most likely cleil is no function but a define, such as #define ceil(x) ((int)(x+0.5)) Even more likely the define is more complex than the example I gave, but the define does exactly what you want. So if you just need the ceil function from -lm better define it on your own. _______________________________________________ https://lists.gnu.org/mailman/listinfo/libtool
