diffutils: bump to 3.5, BUILD_PREREQ+=cmd:perl for man/help2man. (#778)

sys-apps/diffutils/diffutils-3.5.recipe

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+SUMMARY="Several programs for finding differences between files"
+DESCRIPTION="You can use the diff command to show differences between two \
+files, or each corresponding file in two directories. diff outputs \
+differences between files line by line in any of several formats, selectable \
+by command line options. This set of differences is often called a 'diff' or \
+'patch'.
+You can use the cmp command to show the offsets and line numbers where two \
+files differ. cmp can also show all the characters that differ between the two \
+files, side by side.
+You can use the diff3 command to show differences among three files. When two \
+people have made independent changes to a common original, diff3 can report \
+the differences between the original and the two changed versions, and can \
+produce a merged file that contains both persons' changes together with \
+warnings about conflicts.
+You can use the sdiff command to merge two files interactively."
+HOMEPAGE="https://www.gnu.org/software/diffutils/"
+COPYRIGHT="1992-2016 Free Software Foundation, Inc."
+LICENSE="GNU GPL v3"
+REVISION="1"
+SOURCE_URI="http://ftpmirror.gnu.org/diffutils/diffutils-$portVersion.tar.xz"
+CHECKSUM_SHA256="dad398ccd5b9faca6b0ab219a036453f62a602a56203ac659b43e889bec35533"
+PATCHES="diffutils-$portVersion.patchset"
+
+ARCHITECTURES="x86 x86_gcc2 x86_64"
+
+PROVIDES="
+	diffutils = $portVersion
+	cmd:diff = $portVersion
+	cmd:cmp = $portVersion
+	cmd:diff3 = $portVersion
+	cmd:sdiff = $portVersion
+	"
+REQUIRES="
+	haiku
+	"
+
+BUILD_REQUIRES="
+	haiku_devel
+	"
+BUILD_PREREQUIRES="
+	cmd:make
+	cmd:gcc
+	cmd:awk
+	cmd:perl
+	"
+
+defineDebugInfoPackage diffutils \
+	$binDir/cmp \
+	$binDir/diff \
+	$binDir/diff3 \
+	$binDir/sdiff
+
+BUILD()
+{
+	runConfigure ./configure \
+		--disable-gcc-warnings
+	make
+}
+
+INSTALL()
+{
+	make install
+	rm $libDir/charset.alias
+}
+
+TEST()
+{
+	make check
+}