pgsql: Modify the recently-added probe for -Wl, --as-needed some more,

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Modify the recently-added probe for -Wl, --as-needed some more,
Date: 2008-06-27 00:36:16
Message-ID: 20080627003616.C9D18754857@cvs.postgresql.org
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Log Message:
-----------
Modify the recently-added probe for -Wl,--as-needed some more, because RHEL-4
vintage Linux is even more broken than we realized: a link to libreadline
will succeed, and fail only at runtime. It seems that an AC_TRY_RUN test
is the only reliable way to check whether this is really safe. Per report
from Tatsuo.

Modified Files:
--------------
pgsql/config:
c-compiler.m4 (r1.18 -> r1.19)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/config/c-compiler.m4?r1=1.18&r2=1.19)
pgsql:
configure (r1.597 -> r1.598)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.597&r2=1.598)
configure.in (r1.562 -> r1.563)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.562&r2=1.563)

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