avr-gcc: enable cross-build.

srcpkgs/avr-gcc/template

@@ -1,7 +1,7 @@
 # Template build file for 'avr-gcc'
 pkgname=avr-gcc
 version=5.3.0
-revision=1
+revision=2
 short_desc="The GNU C Compiler for AVR"
 maintainer="allan <mail@may.mooo.com>"
 homepage="http://gcc.gnu.org"
@@ -9,9 +9,13 @@ license="GFDL-1.2, GPL-3, LGPL-2.1"
 distfiles="$GNU_SITE/gcc/gcc-$version/gcc-$version.tar.bz2"
 checksum=b84f5592e9218b73dbae612b5253035a7b34a9a1f7688d2e1bfaaf7267d5c4db
 wrksrc="gcc-$version"
-only_for_archs="i686 x86_64"
 
-hostmakedepends="avr-binutils zlib-devel libmpc-devel cloog-devel gmp-devel mpfr-devel"
+hostmakedepends="avr-binutils"
+if [ "$CROSS_BUILD" ]; then
+	# Need a direct cross-compiler for libgcc.
+	hostmakedepends+=" avr-gcc"
+fi
+makedepends="zlib-devel libmpc-devel cloog-devel gmp-devel mpfr-devel"
 depends="avr-binutils"
 nostrip=yes
 
@@ -19,6 +23,7 @@ do_configure() {
 	mkdir obj-avr
 	cd obj-avr
 
+	unset CFLAGS CXXFLAGS LDFLAGS
 	CFLAGS="-O2 -pipe" \
 	CONFIG_SHELL=/bin/bash \
 	LDFLAGS= \
@@ -42,6 +47,8 @@ do_configure() {
 		--enable-plugin \
 		--enable-shared \
 		--prefix=/usr \
+		--build=$XBPS_TRIPLET \
+		--host=$XBPS_CROSS_TRIPLET \
 		--target=avr \
 		--with-gnu-as \
 		--with-gnu-ld \
@@ -65,6 +72,7 @@ post_install() {
 	rm -rf "$DESTDIR"/usr/share/man/man7
 	rm -rf "$DESTDIR"/usr/share/info
 	rm -rf "$DESTDIR"/usr/lib/libcc1.*
+	ln -s avr-gcc "$DESTDIR"/usr/bin/avr-cc
 	find "$DESTDIR"/usr/lib -type f -name "*.a" \
 		-exec avr-strip --strip-debug {} \;
 }