Mac Forum / Programming / Mac Programming / July 2005

I have a simple static library, and a directory containing a test
program (on Mac OS X).

The make run is as follows:
make libfoo.a
cc -W -Wall -O2 -c -o messagebuffer.o messagebuffer.c
libtool -static -o libfoo.a messagebuffer.o
cd test; make test
cc -W -Wall -O2 -I.. -c -o main.o main.c
main.c: In function `main':
main.c:5: warning: unused variable `mb'
cc -W -Wall -o test ../libfoo.a main.o
ld: Undefined symbols:
_newMessageBuffer
make[1]: *** [test] Error 1
make: *** [test] Error 2

So libfoo.a DOES contain newMessageBuffer, because that function
is defined in messagebuffer.[ch], and disassembly shows that's
indeed there.

Even "cc -o bla libfoo.a test/main.o" gives the same ld error.
Any ideas?