# HG changeset patch
# User "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
# Date 1290544528 -3600
# Node ID aa2305c5b2a57fbcda9a1b5bb5fb3a476ac49a13
# Parent  9cdb153ff9df390ac9405233079ef62c62db3709
scripts/xldd: better find sysroot with old gcc

Only starting with 4.4 does gcc have a -print-sysroot option.
For 4.3 or before, we have to play some tricks:
- ask gcc where libc.so is,
  (we expect it in ${sysroot}/usr/lib/libc.so)
- trim /usr/lib/libc.so from the result

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff -r 9cdb153ff9df -r aa2305c5b2a5 scripts/xldd.in
--- a/scripts/xldd.in	Tue Nov 23 21:35:15 2010 +0100
+++ b/scripts/xldd.in	Tue Nov 23 21:35:28 2010 +0100
@@ -134,7 +134,15 @@
     exit 1
 fi
 
-sysroot="$( "${gcc}" -print-sysroot )"
+sysroot="$( "${gcc}" -print-sysroot 2>/dev/null )"
+if [ -z "${sysroot}" ]; then
+    sysroot="$( "${gcc}" -print-file-name=libc.so 2>/dev/null   \
+                |sed -r -e 's:/usr/lib/libc.so$::;'             \
+              )"
+fi
+if [ -z "${sysroot}" ]; then
+    do_error "unable to find sysroot for \`${gcc}'"
+fi
 
 do_report_needed_found() {
     local needed="${1}"