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Modify the recently-added probe for -Wl,--as-needed some more, because RHEL-4

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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.
This commit is contained in:
Tom Lane
2008-06-27 00:36:16 +00:00
parent 68057055f6
commit 623f8a0969
3 changed files with 67 additions and 58 deletions
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4
configure.in
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@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
dnl $PostgreSQL: pgsql/configure.in,v 1.562 2008/05/20 03:30:22 tgl Exp $
dnl $PostgreSQL: pgsql/configure.in,v 1.563 2008/06/27 00:36:16 tgl Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@ -1699,7 +1699,7 @@ fi
# If compiler will take -Wl,--as-needed then add that to LDFLAGS.
# This is much easier than trying to filter LIBS to the minimum for each
# executable. (Note that shared libraries won't use this switch, though.)
# executable. (Note that shared library links won't use this switch, though.)
# On (at least) some Red-Hat-derived systems, this switch breaks linking to
# libreadline; therefore we postpone testing it until we know what library
# dependencies readline has. The test code will try to link with $LIBS.