--- ghdl-0.26.ebuild.orig	2008-05-18 20:51:01.075310439 +0200
+++ ghdl-0.26.ebuild	2008-05-18 18:39:41.352000976 +0200
@@ -38,6 +38,10 @@
 	sed -i -e 's/atan2(z.re,z.im)/atan2(z.im,z.re)/' \
 		gcc/vhdl/libraries/ieee/math_complex-body.vhdl || die "sed failed"
 
+	# GHDL installs library files that check their mtimes. Preserve them.
+	sed -i -e 's/${INSTALL} -m 644/${INSTALL} -m 644 -p/' \
+		configure* || die "sed failed"
+
 	# For multilib profile arch, see bug #203721
 	if (has_multilib_profile || use multilib ) ; then
 		for T_LINUX64 in `find "${S}/gcc/config" -name t-linux64` ;
@@ -57,6 +61,12 @@
 }
 
 src_install() {
+	# GHDL installs library files that check their mtimes. Preserve them.
+	insopts -m0644 -p
+	exeopts -m0755 -p
+	libopts -m0644 -p
+	diropts -m0755 -p
+
 	emake DESTDIR="${D}" install || die "Installation failed"
 
 	cd "${D}"/usr/bin ; rm `ls --ignore=ghdl`