sync code with last improvements from OpenBSD

lib/mesa/mk/pkgconfig/gen_glesv1_cm.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+#
+# $OpenBSD: gen_glesv1_cm.sh,v 1.1 2020/08/26 06:02:41 jsg Exp $
+#
+# Copyright (c) 2010,2011 Jasper Lievisse Adriaanse <jasper@openbsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+# Generate pkg-config file for libGLESv1_CM
+
+usage() {
+	echo "usage: ${0##*/} -c current_directory -o obj_directory"
+	exit 1
+}
+
+curdir=
+objdir=
+while getopts "c:o:" flag; do
+	case "$flag" in
+		c)
+			curdir=$OPTARG
+			;;
+		o)
+			objdir=$OPTARG
+			;;
+		*)
+			usage
+			;;
+	esac
+done
+
+[ -n "${curdir}" ] || usage
+if [ ! -d "${curdir}" ]; then
+	echo "${0##*/}: ${curdir}: not found"
+	exit 1
+fi
+[ -n "${objdir}" ] || usage
+if [ ! -w "${objdir}" ]; then
+	echo "${0##*/}: ${objdir}: not found or not writable"
+	exit 1
+fi
+
+lib_version=$(cat ${curdir}/../../VERSION)
+
+pc_file="${objdir}/glesv1_cm.pc"
+cat > ${pc_file} << __EOF__
+prefix=/usr/X11R6
+libdir=\${prefix}/lib
+includedir=\${prefix}/include
+
+Name: glesv1_cm
+Description: Mesa OpenGL ES 1.1 CM library
+Version: ${lib_version}
+Libs: -L\${libdir} -lGLESv1_CM
+Libs.private: -lpthread -pthread -lm
+Cflags: -I\${includedir}
+__EOF__