From a13e268ee2ed97d34e4e5d21870711353474a530 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nirgal=20Vourg=C3=A8re?= <contact_mdbtools@nirgal.com>
Date: Fri, 5 Oct 2012 15:26:37 +0200
Subject: [PATCH] New configure option --disable-as-needed

Some linkers don't support that option
---
 configure.ac | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index dccb8f2..7f7a0cb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,7 +67,25 @@ AC_SUBST(SQL)
 AC_SUBST(LFLAGS)
 
 CFLAGS="$CFLAGS -Wall"
-LDFLAGS="$LDFLAGS -Wl,--as-needed"
+dnl Enable -Wl,--as-needed by default to prevent overlinking
+
+AC_ARG_ENABLE([as-needed],
+  AC_HELP_STRING([--disable-as-needed],
+  [Disable overlinking protection]),
+  [enable_as_needed=$enableval], [enable_as_needed=yes])
+
+if test "x$enable_as_needed" != "xno"; then
+  AC_MSG_CHECKING([whether $LD accepts --as-needed])
+  case `$LD --as-needed -v 2>&1 </dev/null` in
+  *GNU* | *'with BFD'*)
+    LDFLAGS="$LDFLAGS -Wl,--as-needed"
+    AC_MSG_RESULT([yes])
+    ;;
+  *)
+    AC_MSG_RESULT([no])
+    ;;
+  esac
+fi
 
 dnl check whether ld supports --version-script
 VERSION_SCRIPT=yes