[ale] gcc ques

[John J. Cruz]

I use the following gcc command:
gcc -o NUcompass -lm -lX11 NUcompass.o

response displayed
/usr/bin/ld: cannot find -lX11

X11 >> /usr/X11R6/lib/libX11.so.6

echo $PATH includes /usr/X11R6/lib

I don't understand why gcc insist on looking in directory /usr/bin when
the library in question is in /usr/X11R6/lib?  For that matter how do I
change gcc to look somewhere else?

The header file "includes <math.h> why should I have to add -lm to link
with the math library?







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