Re: [build error] ./.libs/libguile-2.0.so: undefined reference to `clock_getcpuclockid'

[Andy Wingo <wingo@pobox.com>]

Hi Douglas,

On Tue 10 May 2011 20:16, Douglas Mencken <dougmencken@gmail.com> writes:

> To get clock_getcpuclockid, it is needed to link with librt, where
> this symbol is present

Can you check your config.log for mentions of clock_gettime ?

For example in mine I have:

  configure:25329: checking for library containing clock_gettime
  configure:25377: result: -lrt
  configure:25389: checking for clock_gettime
  configure:25389: result: yes
  configure:25389: checking for clock_settime
  configure:25389: result: yes

> I'm trying to build guile-v2.0.1-53-g8f6a4b2, and got the following errors:
>
>   CC       guile-guile.o
>   CCLD     guile
> ./.libs/libguile-2.0.so: warning: the use of `tmpnam' is dangerous,
> better use `mkstemp'
> ./.libs/libguile-2.0.so: warning: gethostbyaddr is obsolescent, use
> getaddrinfo() instead.
> ./.libs/libguile-2.0.so: warning: gethostbyname is obsolescent, use
> getnameinfo() instead.
> ./.libs/libguile-2.0.so: undefined reference to `clock_getcpuclockid'
> collect2: ld returned 1 exit status
> make[3]: *** [guile] Error 1

Odd.  To have gotten here you had to have built libguile already, which
indeed should have linked to -lrt.  Can you grep your libguile/Makefile
for LIB_CLOCK_GETTIME ?

Is it perhaps that clock_getcpuclockid is in -lrt but clock_gettime is
in your libc?

Andy
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