exported.sh: Improve error handling.

[dxcommon.git] / snippet / exported.sh.in

diff --git a/snippet/exported.sh.in b/snippet/exported.sh.in
index 762600ac9cdf25cad96da807efc5da604ccf14f6..ef875a55f3ddd500be41a9a5db4beef24a712afc 100644 (file)
--- a/snippet/exported.sh.in
+++ b/snippet/exported.sh.in
@@ -1,6 +1,6 @@
 #!@SHELL@
 #
-# Copyright © 2011 Nick Bowler
+# Copyright © 2011-2012 Nick Bowler
 #
 # Determine the list of exported symbols from archives or (libtool) object
 # files.
@@ -40,5 +40,19 @@ done
 set x $OBJS; shift
 case $# in
 0) : ;;
-*) @NM@ $OBJS | @GLOBAL_SYMBOL_PIPE@ | @SED@ 's/^.* //' | sort | uniq ;;
+*)
+       exec 4>&1
+       eval_cmd=`exec 3>&1
+               { @NM@ $OBJS 3>&-
+                       echo "(exit $?) || exit $?" >&3
+               } | { @GLOBAL_SYMBOL_PIPE@ 3>&-
+                       echo "(exit $?) || exit $?" >&3
+               } | { @SED@ 's/^.* //' 3>&-
+                       echo "(exit $?) || exit $?" >&3
+               } | { sort -u 3>&-
+                       echo "(exit $?) || exit $?" >&3
+               } >&4`
+       exec 4>&-
+       eval "$eval_cmd"
+;;
 esac