Thread: Makefile errors from c code

Hello everyone, I have this c app and I'm trying to run the make file for it....I keep getting the following errors. I'm somewhat new to c and I don't understand what the errors below mean, it doesn't even provide a line number.

Code:

ld build/*.o  -shared -lm -lc -soname=libitl.so.0 -o build/libitl.so.0.0.7
/usr/lib/libm.a(t-d000683.o):(.text+0x2): undefined reference to `_imp__acos'
/usr/lib/libm.a(t-d001313.o):(.text+0x2): undefined reference to `_imp__pow'
/usr/lib/libm.a(t-d000703.o):(.text+0x2): undefined reference to `_imp__asin'
/usr/lib/libm.a(t-d000710.o):(.text+0x2): undefined reference to `_imp__atan'
/usr/lib/libm.a(t-d001672.o):(.text+0x2): undefined reference to `_imp__tan'
/usr/lib/libm.a(t-d000711.o):(.text+0x2): undefined reference to `_imp__atan2'
/usr/lib/libm.a(t-d001584.o):(.text+0x2): undefined reference to `_imp__sin'
/usr/lib/libm.a(t-d000761.o):(.text+0x2): undefined reference to `_imp__cos'
/usr/lib/libm.a(t-d000913.o):(.text+0x2): undefined reference to `_imp__floor'
/usr/lib/libm.a(t-d000922.o):(.text+0x2): undefined reference to `_imp__fmod'
/usr/lib/libm.a(t-d001248.o):(.text+0x2): undefined reference to `_imp__modf'
/usr/lib/libc.a(t-d001212.o):(.text+0x2): undefined reference to `_imp__malloc'
/usr/lib/libc.a(t-d001318.o):(.text+0x2): undefined reference to `_imp__printf'
make: *** [build/libitl.so] Error 1

Am I missing an include statement in my code? I also keep getting the following warning:

Code:

 warning: -fPIC ignored for target (all code is position independent)

If anyone recognizes how to solve this problem I'd really appreciate if you can tell me.

Seems that ld is pulling in the archive versions of shared libraries libm.a and libc.a instead of libm.so and libc.so; so make sure the shared versions exist.

I'm using cygwin....do you know where I can find these files libc.so and libm.so?

Thanks