File reproducible.patch of Package autogen.20278

libopts-41.1.16.tar.gz contained timestamps from build
and indeterminism from filesystem readdir order.

See https://reproducible-builds.org/ for why this matters.

Index: autogen-5.18.12/pkg/libopts/mklibsrc.sh
===================================================================
--- autogen-5.18.12.orig/pkg/libopts/mklibsrc.sh
+++ autogen-5.18.12/pkg/libopts/mklibsrc.sh
@@ -113,7 +113,9 @@ sfx=tar.gz
 cd ..
 echo ! cd `pwd`
 echo ! tar cvf ${tag}.${sfx} ${tag}
-tar cvf - ${tag} | $gz > ${top_builddir}/autoopts/${tag}.${sfx}
+rbopts=""
+[ -z "$SOURCE_DATE_EPOCH" ] || ! tar --help|grep -q sort= || rbopts="--sort=name --format=gnu --clamp-mtime --mtime @$SOURCE_DATE_EPOCH"
+tar cvf - $rbopts ${tag} | $gz > ${top_builddir}/autoopts/${tag}.${sfx}
 rm -rf ${tag}
 
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