New question #77587 on Ubuntu:
https://answers.launchpad.net/ubuntu/+question/77587
My program is:
#include <math.h>
#include <stdio.h>
main ()
{
double x, y;
x=0.16;
y=exp(x);
printf("x=%f y=%f\n", x, y);
}
But compilation fails:
CMD:gcc checkExp.c
/tmp/ccEhiLY7.o: In function `main':
checkExp.c:(.text+0x21): undefined reference to `exp'
collect2: ld returned 1 exit status
The same happens with the Logarithm function, and trigonometric functions (sin,
cos, etc.)
In addition, the Absolute-Value function (abs) does pass compilation, but
running the program gives garbage:
CMD:a.out
x=-0.160000 y=1202590843.000000
I have checked that I do have the file /usr/include/math.h
Actually I have run the program while including ALL header files of
/usr/include but still without success -
the compiler does not recognize these mathematical functions.
What do I have to do in order to have the C-compiler recognize these math
functions?
Thank you, Gidi
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