static/dynamic linker-problem

[fafner]

I'm experimenting with making libraries, and I want to make a static library. The library itself links with other shared libraries, such as opengl. Is it possible to make a static library that itself links with a shared library? The reason I ask is that when I try to compile a test-program which uses the library using the following command:

$(CC) -static src/test.c -L./lib -lmylib -o bin/test $(CFLAGS)

where CFLAGS = -lglut -lGL -lGLU -lGLEW -lm -std=c99

the linker says it can't find -lGL, which I have linked successfully to many times before. The library itself compiles fine. This is probably just a n00b-error, as I have never compiled a library before, but I've been stuck on this for some time.

EDIT: Ok, I fixed the build-issue by putting -shared in front of the non-static libraries, but now the executable itself segfaults with the following error from gdb:

Program received signal SIGSEGV, Segmentation fault.
0x800003e7 in __do_global_dtors_aux ()

, even if main contains no code except for return 0. Does anyone know what this error means?

Fafner

[mik2718]

Not sure, but my understanding of libraries is that they are collections of functions to be used when developing programs and so there would not be a main function in a library.

My understanding of a static library is that it is just a bunch of object files put together in an archive. The book I have here (beginning linux programming - wrox press) says to use ar to create a static library.

The example given

ar crv lib.a bill.o fred.o 

which creates a static library lib.a containing the object files bill.o fred.o