ubuntu : __errno_location undefined

[czp.opensource@gmail.com]

hi all:
my code is work well on fedora 7 or fedora 8. now i installed
ubuntu, my code can't compile crrectly.
error is __errno_locatio n function is not defined: undefined
reference to `__errno_locati on()'
but the function is exectly defined in libpthread.a.
nm /usr/lib/libpthread.a | grep errno
U __errno_locatio n
errno.o:
00000051 T __errno_locatio n
00000000 T __h_errno_locat ion
U __errno_locatio n
U __errno_locatio n

why? help please!

Allen

[Ian Collins]

Re: ubuntu : __errno_locatio n undefined

czp.opensource@ gmail.com wrote:

>
why? help please!
>

Try a Linux group, they'll know.

--
Ian Collins.

[Chris Gordon-Smith]

Re: ubuntu : __errno_locatio n undefined

czp.opensource@ gmail.com wrote:

hi all:
my code is work well on fedora 7 or fedora 8. now i installed
ubuntu, my code can't compile crrectly.
error is __errno_locatio n function is not defined: undefined
reference to `__errno_locati on()'
but the function is exectly defined in libpthread.a.
nm /usr/lib/libpthread.a | grep errno
U __errno_locatio n
errno.o:
00000051 T __errno_locatio n
00000000 T __h_errno_locat ion
U __errno_locatio n
U __errno_locatio n
>
why? help please!
>
Allen

Sounds like a linking problem. Is it something to do with the way you have
specified libraries to be used. Often if you specify library A first and B
later in the list, then if something in B calls something in A, the linker
will not find it. One way to handle this is to repeat the list of
libraries, so that A now appears after B, as well as before it.

Chris Gordon-Smith

https://www.simsoup.info