gcc and math.h

pippet · 06-24-2004, 01:03 AM

i have written a c program in which i invoked cos(x). I compiled it with gcc but failed.
i have tried it with both math.h and tgmath.h but it didn't compile.
I think i have to use some option of gcc.
plz tell me which i the option i have to use.

Dark_Helmet · 06-24-2004, 01:40 AM

The math routines are kept in an external library. If you use any functions included in math.h, then you need to tell gcc to explicitly use that external library.

For example, if your program was named: my_prog.c

Compile it with: gcc -o my_prog -lm my_prog.c

The math library is named libm. You tell gcc to use it with the -lm (lowercase L).

pippet · 06-24-2004, 02:35 AM

It works!!
thank u very much for ur help.