libstdc++/7922

[pf3gnuchains/gcc-fork.git] / ltmain.sh

diff --git a/ltmain.sh b/ltmain.sh
index e9b2634..92526b6 100644 (file)
--- a/ltmain.sh
+++ b/ltmain.sh
@@ -4247,6 +4247,20 @@ fi\
           objlist=
           concat_cmds=
           save_oldobjs=$oldobjs
+         # GNU ar 2.10+ was changed to match POSIX; thus no paths are
+         # encoded into archives.  This makes 'ar r' malfunction in
+         # this piecewise linking case whenever conflicting object
+         # names appear in distinct ar calls; check, warn and compensate.
+          if (for obj in $save_oldobjs
+           do
+             $echo "X$obj" | $Xsed -e 's%^.*/%%'
+           done | sort | sort -uc >/dev/null 2>&1); then
+           :
+         else
+           $echo "$modename: warning: object name conflicts; overriding AR_FLAGS to 'cq'" 1>&2
+           $echo "$modename: warning: to ensure that POSIX-compatible ar will work" 1>&2
+           AR_FLAGS=cq
+         fi
           for obj in $save_oldobjs
           do
             oldobjs="$objlist $obj"
@@ -4305,7 +4319,7 @@ fi\
       for tag in $taglist; do
         tagopts="$tagopts --tag $tag"
       done
-      relink_command="(cd `pwd`; $SHELL $0$tagopts --mode=relink $libtool_args"
+      relink_command="(cd `pwd`; $SHELL $0$tagopts --mode=relink $libtool_args)"
       relink_command=`$echo "X$relink_command" | $Xsed -e "$sed_quote_subst"`
 
       # Only create the output if not a dry run.