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Can you please tell me how can I resolve this 'undefined reference' error when linking on Ubuntu 10.10

conftest.c:(.text+0x4): undefined reference to `glib_major_version'

conftest.c:(.text+0xd): undefined reference to `glib_minor_version'

conftest.c:(.text+0x16): undefined reference to `glib_micro_version'

collect2: ld returned 1 exit status

I have added 'export LD_LIBRARY_PATH=/usr/lib:/lib:$LD_LIBRARY_PATH' to my .bashrc.

$ ls -la libgl*.*

lrwxrwxrwx 1 root root 23 2010-12-17 18:29 ->

-rw-r--r-- 1 root root 842208 2010-09-27 16:16

/lib $ pwd


But that does not solve the problem. What should I do?

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Did you add -lglib to your linker options, e.g. gcc -lglib or ld -lglib or LDFLAGS=-lglib? – Mikel Feb 2 '11 at 20:43
Is this your own code, or someone else's? Does it have a ./configure script? You need to show us what leads up to the error, e.g. what command you are running. – Mikel Feb 2 '11 at 20:55
up vote 0 down vote accepted

What command are you running to compile it?

Are there any other errors leading up to this error?

I have the same version of the file as you, and it has those symbols.

$ ls -l libglib*
lrwxrwxrwx 1 root root     23 2010-12-05 06:03 ->
-rw-r--r-- 1 root root 842208 2010-09-28 09:16
$ nm -D | grep version
00073730 T glib_check_version
000c849c R glib_major_version
000c84a4 R glib_micro_version
000c84a0 R glib_minor_version

Are you compiling your own program? Perhaps you just need to tell the linker to link in glib by adding the -lglib-2.0 option.

If you are running
gcc -o conftest conftest.c, you should do
gcc -o conftest -lglib-2.0 conftest.c instead.

Or you can add -lglib-2.0 to LDFLAGS.

Are you compiling someone else's program? It might be using pkgconfig. There might be some stuff in /usr/local that is confusing things.

Did you install any other programs or libraries yourself? Perhaps something that installed itself in /usr/local/lib?

What does cat /usr/lib/pkgconfig/glib* say?
What does cat /usr/local/lib/pkgconfig/glib* say?

You might need to change the value of LD_LIBRARY_PATH to include /usr/local/lib, or perhaps change PKG_CONFIG_PATH, or add some options to ./configure.

The answer depends on what you are doing.

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