Re: [patch] fix "broken pipe" message from lseek test

[Ben Pfaff]

Bruno Haible <address@hidden> writes:

>> I noticed that (sometimes?) the lseek check prints a "broken
>> pipe" message in the middle of "configure" output, e.g.
>>         checking whether lseek detects pipes... ../configure: line 30326: 
>> echo: write error: Broken pipe
>> as reported here under step 19:
>>         http://benpfaff.org/~blp/pspp-master/20100220040512/
>
> Below is a proposed fix (untested).

I tested it, but I still see the "broken pipe" error with it.  I
verified that "configure" was updated from your patch:

  if test -s conftest$ac_exeext \
             && ./conftest$ac_exeext < conftest.$ac_ext \
             && { : "Avoid error message from bash."; \
                  : "See func_reset_sigpipe in gnulib-tool."; \
                  if test -n "$BASH_VERSION"; then trap - SIGPIPE; fi; \
                  echo hi | ./conftest$ac_exeext; \
                  test $? = 1; \
                }; then
            gl_cv_func_lseek_pipe=yes
          else
            gl_cv_func_lseek_pipe=no
          fi

Could the test program, instead, just call pipe() itself and try
to seek on it?  Then there would be no need for the shell to
create the pipe or to try to write to it.  If this would work I'd
be happy to write up a patch.
-- 
"Let others praise ancient times; I am glad I was born in these."
--Ovid (43 BC-18 AD)