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Author: Andreas Beckmann <anbe@debian.org>
Description: relax prebuild.sh directory check
the shell may set $0 to an absolute path if called as ./prebuild.sh
--- a/unix/prebuild.sh
+++ b/unix/prebuild.sh
@@ -61,7 +61,7 @@ required_automake="1.9"
###############################################################################
# Prevents running from another directory.
-if test x"`dirname $0`" != x"."; then
+if test x"`dirname $0`" != x"." && ! cmp -s "$0" ../unix/prebuild.sh; then
echo "$0: must ran from POV-Ray's unix/ directory"
exit 1
fi
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