Cannot compile against gobject-2.0 - c

Question

I am trying to learn the gobject system, so I read some of the documentation on the gnome site and made a simple gobject parented to GObject. I don't wan't to keep running the gcc job every time I want to compile, and I also wanted to learn a build system at the same time. I tried autotools, which I got working to the point where pkg-config searches for gobject-2.0.
To compile my project from the command line, I do: gcc *.c $(pkg-config --cflags --libs gobject-2.0) (I had to take out the extra ticks for formatting). Anyway <--- this command works.
However: gcc $(pkg-config --cflags --libs gobject-2.0) *.c, which SHOULD BE the SAME COMMAND, returns this:
main.c: In function 'main':
main.c:10:10: warning: initialization from incompatible pointer type [enabled by default]
/tmp/ccxO7wkX.o: In function `main':
main.c:(.text+0x1a): undefined reference to `g_type_init'
main.c:(.text+0x27): undefined reference to `g_type_create_instance'
/tmp/ccPu2beU.o: In function `a_get_type':
myobject.c:(.text+0x57): undefined reference to `g_type_register_static'
collect2: ld returned 1 exit status
Yes, it is the EXACT SAME COMMAND WITH ANOTHER ORDER. I have no clue what's going wrong. Here is how autotools/automake does the build:
gcc -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -g -O2 -lgobject-2.0 -lglib-2.0 -o GObjectTest main.o myobject.o
main.o: In function `main':
/home/aj/Desktop/GObjectTest/src/main.c:9: undefined reference to `g_type_init'
/home/aj/Desktop/GObjectTest/src/main.c:10: undefined reference to `g_type_create_instance'
myobject.o: In function `a_get_type':
/home/aj/Desktop/GObjectTest/src/myobject.c:19: undefined reference to `g_type_register_static'
collect2: ld returned 1 exit status
make: *** [GObjectTest] Error 1
Is this some quirky gcc compile thing? I tried with clang too no avail, which makes me think that this is a linker problem? I really have no idea, and was hoping that someone out there will. This is pretty frustrating.
Here is the "offending code":
GType a_get_type (void)
{
if (type == 0) {
GTypeInfo info = {
sizeof(AClass),
NULL,
NULL,
(GClassInitFunc) a_class_init,
NULL,
NULL,
sizeof(A),
0,
(GInstanceInitFunc) NULL
};
type = g_type_register_static (G_TYPE_OBJECT,
"AType",
&info, 0);
}
return type;
}
Edit: Here is the output of my autotools build, the make part anyway:
$ make
make all-recursive
make[1]: Entering directory `/home/aj/Desktop/GObjectTest'
Making all in src
make[2]: Entering directory `/home/aj/Desktop/GObjectTest/src'
gcc -DHAVE_CONFIG_H -I. -I.. -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -g -O2 -MT main.o -MD -MP -MF .deps/main.Tpo -c -o main.o main.c
main.c: In function 'main':
main.c:10:10: warning: initialization from incompatible pointer type [enabled by default]
mv -f .deps/main.Tpo .deps/main.Po
gcc -DHAVE_CONFIG_H -I. -I.. -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -g -O2 -MT myobject.o -MD -MP -MF .deps/myobject.Tpo -c -o myobject.o myobject.c
mv -f .deps/myobject.Tpo .deps/myobject.Po
gcc -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -g -O2 -lgobject-2.0 -lglib-2.0 -o GObjectTest main.o myobject.o
main.o: In function `main':
/home/aj/Desktop/GObjectTest/src/main.c:9: undefined reference to `g_type_init'
/home/aj/Desktop/GObjectTest/src/main.c:10: undefined reference to `g_type_create_instance'
myobject.o: In function `a_get_type':
/home/aj/Desktop/GObjectTest/src/myobject.c:19: undefined reference to `g_type_register_static'
collect2: ld returned 1 exit status
make[2]: *** [GObjectTest] Error 1
make[2]: Leaving directory `/home/aj/Desktop/GObjectTest/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/aj/Desktop/GObjectTest'
make: *** [all] Error 2
Here is the interesting part: replace gcc -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -g -O2 -lgobject-2.0 -lglib-2.0 -o GObjectTest main.o myobject.o with gcc -o GObjectTest main.o myobject.o -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -g -O2 -lgobject-2.0 -lglib-2.0 and it works.