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Adjust -Wl,--asneeded test to avoid using the switch if it breaks

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libreadline.  What we will do for compatibility :-(
This commit is contained in:
Tom Lane
2008-05-20 03:30:22 +00:00
parent 9f19470966
commit 1ac1bea076
3 changed files with 172 additions and 136 deletions
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6
config/c-compiler.m4
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@ -1,5 +1,5 @@
# Macros to detect C compiler features
# $PostgreSQL: pgsql/config/c-compiler.m4,v 1.17 2008/05/18 20:13:12 tgl Exp $
# $PostgreSQL: pgsql/config/c-compiler.m4,v 1.18 2008/05/20 03:30:21 tgl Exp $
# PGAC_C_SIGNED
@ -117,11 +117,13 @@ _AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
# ------------------------
# Given a string, check if the compiler supports the string as a
# command-line option. If it does, add the string to LDFLAGS.
# For reasons you'd really rather not know about, this checks whether
# you can link to a particular function, not just whether you can link.
AC_DEFUN([PGAC_PROG_CC_LDFLAGS_OPT],
[AC_MSG_CHECKING([if $CC supports $1])
pgac_save_LDFLAGS=$LDFLAGS
LDFLAGS="$pgac_save_LDFLAGS $1"
AC_LINK_IFELSE([AC_LANG_PROGRAM()],
AC_LINK_IFELSE([AC_LANG_CALL([],[$2])],
AC_MSG_RESULT(yes),
[LDFLAGS="$pgac_save_LDFLAGS"
AC_MSG_RESULT(no)])