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Make another try at using -Wl,--as-needed to suppress linking of unnecessary

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shared libraries.  We've tried this before and had problems with libreadline
not linking properly on some platforms, but that seems to be a libreadline
bug that may have been fixed by now.  In any case, it's early enough in the
8.4 devel cycle that we can afford to have some transient breakage while
we work out any portability problems.

On Darwin, we try -Wl,-dead_strip_dylibs, which seems to be the equivalent
incantation there.
This commit is contained in:
Tom Lane
2008-05-18 20:13:12 +00:00
parent 07d08a8828
commit 2dad10f467
3 changed files with 138 additions and 2 deletions
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18
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 1.16 2008/04/18 18:43:08 alvherre Exp $
# $PostgreSQL: pgsql/config/c-compiler.m4,v 1.17 2008/05/18 20:13:12 tgl Exp $
# PGAC_C_SIGNED
@ -110,3 +110,19 @@ _AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
[CFLAGS="$pgac_save_CFLAGS"
AC_MSG_RESULT(no)])
])# PGAC_PROG_CC_CFLAGS_OPT
# PGAC_PROG_CC_LDFLAGS_OPT
# ------------------------
# Given a string, check if the compiler supports the string as a
# command-line option. If it does, add the string to LDFLAGS.
AC_DEFUN([PGAC_PROG_CC_LDFLAGS_OPT],
[AC_MSG_CHECKING([if $CC supports $1])
pgac_save_LDFLAGS=$LDFLAGS
LDFLAGS="$pgac_save_LDFLAGS $1"
AC_LINK_IFELSE([AC_LANG_PROGRAM()],
AC_MSG_RESULT(yes),
[LDFLAGS="$pgac_save_LDFLAGS"
AC_MSG_RESULT(no)])
])# PGAC_PROG_CC_LDFLAGS_OPT