On Tue, 23 Jan 2001 19:22:34 +0100, Ronald Bultje <[EMAIL PROTECTED]> said:
> [rbultje@tux linux_studio-0.11]$ make
> gcc `gtk-config --cflags` -g -Wall -c -o tvplug.o tvplug.c
OK.. So we make a tvplug.o here...
> gcc studio.c -o studio `gtk-config --cflags` -g -Wall `gtk-config --libs
> gthread` -L/usr/X11R6/lib -lXv -lXxf86vm -lXxf86dga -lXaw3d -lXmu -lXt
> -lSM -lICE -lXext -lX11
But we don't reference it here...
> /home/rbultje/linux_studio-0.11/studio.c:575: undefined reference to
> `create_tv_plug'
So since we didn't reference tvplug.o, the linker did the *reasonable* thing
and said "I can't find the function that's in the .o file you didn't TELL
me about".
The 'gcc' command that does the linking (has '-o studio') has to reference
ALL the objects (.o files, -lwhatver) needed to clean things up. It has
an *implicit* reference to studio.o because it just compiled studio.c, but
you have to add tvplug.o to the command.
Suggestion:
OBJS=studio.o tvplug.o
OTHERLIBS= #anything else you need to get it to work here..
.c.o: gcc -c -g -Wall `gtk-config --cflags` $@
studio: $(OBJS)
gcc -o studio $(OBJS) `gtk-config --libs` $(OTHERLIBS)
Makes it a *LOT* easier to fix things when you add a third .o ;)
And yes, I've *probably* got flags etc wrong. This is for *style*.
Tailor to actually work,. ;l)
--
Valdis Kletnieks
Operating Systems Analyst
Virginia Tech
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