| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | seebs(at)seebs(dot)net |
| Cc: | pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #7816: test for compiler output produces bogus results |
| Date: | 2013-01-21 05:02:50 |
| Message-ID: | 9064.1358744570@sss.pgh.pa.us |
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| Lists: | pgsql-bugs |
seebs(at)seebs(dot)net writes:
> Your modified acx_pthread.m4 tests for any compiler output to stderr at all,
> and considers it evidence that a flag is invalid.
I believe the reason we do that is that we want to find flags that will
not result in the compiler generating a warning during each and every
source compile. Most developers would consider such a behavior broken,
and not without good reason.
> This test is not actually correct, although it usually works.
[ shrug... ] Given the lack of previous complaints, it works 99.999%
of the time, which is about as much reliability as can be hoped for in
most autoconf tests :-(. I'm afraid we can't help you without breaking
it worse for a larger number of other people.
regards, tom lane
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