From 26ec31c6c2b10a9afe93335a948797a3ceeebfd5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timo=20Ter=C3=A4s?= <timo.teras@iki.fi>
Date: Fri, 22 Jul 2016 13:54:31 +0300
Subject: abuild: improve cross compiling support

---
 functions.sh.in | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'functions.sh.in')

diff --git a/functions.sh.in b/functions.sh.in
index 9c0cc57..6a24d21 100644
--- a/functions.sh.in
+++ b/functions.sh.in
@@ -3,6 +3,17 @@
 sysconfdir=@sysconfdir@
 program=${0##*/}
 
+arch_to_hostspec() {
+	case "$1" in
+	aarch64)	echo "aarch64-alpine-linux-musl" ;;
+	armhf)		echo "armhf-alpine-linux-muslgnueabihf" ;;
+	armv7)		echo "armv7-alpine-linux-musleabihf" ;;
+	x86)		echo "i586-alpine-linux-musl" ;;
+	x86_64)		echo "x86_64-alpine-linux-musl" ;;
+	*)		echo "unknown" ;;
+	esac
+}
+
 hostspec_to_arch() {
 	case "$1" in
 	aarch64*-*-*-*)		echo "aarch64" ;;
@@ -89,11 +100,39 @@ readconfig() {
 	[ -z "$CBUILD" ] && CBUILD="$(gcc -dumpmachine)"
 	[ -z "$CHOST" ] && CHOST="$CBUILD"
 	[ -z "$CTARGET" ] && CTARGET="$CHOST"
+	[ "$(arch_to_hostspec $CBUILD)" != "unknown" ] && CBUILD="$(arch_to_hostspec $CBUILD)"
+	[ "$(arch_to_hostspec $CHOST)" != "unknown" ] && CHOST="$(arch_to_hostspec $CHOST)"
+	[ "$(arch_to_hostspec $CTARGET)" != "unknown" ] && CTARGET="$(arch_to_hostspec $CTARGET)"
+
 	[ -z "$CARCH" ] && CARCH="$(hostspec_to_arch $CHOST)"
 	[ -z "$CLIBC" ] && CLIBC="$(hostspec_to_libc $CHOST)"
 	[ -z "$CTARGET_ARCH" ] && CTARGET_ARCH="$(hostspec_to_arch $CTARGET)"
 	[ -z "$CTARGET_LIBC" ] && CTARGET_LIBC="$(hostspec_to_libc $CTARGET)"
 
+	if [ "$CHOST" != "$CTARGET" ]; then
+		# setup environment for creating cross compiler
+		[ -z "$CBUILDROOT" ] && export CBUILDROOT="$HOME/sysroot-$CTARGET_ARCH/"
+	elif [ "$CBUILD" != "$CHOST" ]; then
+		# setup build root
+		[ -z "$CBUILDROOT" ] && export CBUILDROOT="$HOME/sysroot-$CTARGET_ARCH/"
+		# prepare pkg-config for cross building
+		[ -z "$PKG_CONFIG_PATH" ] && export PKG_CONFIG_PATH="${CBUILDROOT}/usr/lib/pkgconfig/"
+		[ -z "$PKG_CONFIG_SYSROOT_DIR" ] && export PKG_CONFIG_SYSROOT_DIR="${CBUILDROOT}"
+		# libtool bug workaround for extra rpaths
+		[ -z "$lt_cv_sys_lib_dlsearch_path_spec" ] && \
+			export lt_cv_sys_lib_dlsearch_path_spec="${CBUILDROOT}/lib ${CBUILDROOT}/usr/lib /usr/lib /lib /usr/local/lib"
+		# setup cross-compiler
+		if [ -z "$CROSS_COMPILE" ]; then
+			export CROSS_COMPILE="${CHOST}-"
+			export CC=${CROSS_COMPILE}gcc
+			export CXX=${CROSS_COMPILE}g++
+			export LD=${CROSS_COMPILE}ld
+			export CPPFLAGS="--sysroot=${CBUILDROOT} $CPPFLAGS"
+			export CXXFLAGS="--sysroot=${CBUILDROOT} $CXXFLAGS"
+			export CFLAGS="--sysroot=${CBUILDROOT} $CFLAGS"
+			export LDFLAGS="--sysroot=${CBUILDROOT} $LDFLAGS"
+		fi
+	fi
 }
 readconfig
 
-- 
cgit v1.2.3