Make tools/check scripts cross-friendly

This patch introduces tools/check/funcs.sh with some
cross-friendly abstractions, then modifies the check_*
scripts to use them.

Signed-off-by: Aron Griffis <aron@hp.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/tools/check/funcs.sh b/tools/check/funcs.sh
new file mode 100644
index 0000000000..d3fb60abb3
--- /dev/null
+++ b/tools/check/funcs.sh
@@ -0,0 +1,85 @@
+# has is the same as which, except it handles cross environments
+has() {
+	if [ -z "$CROSS_COMPILE" ]; then
+		command which "$@"
+		return $?
+	fi
+
+	check_sys_root || return 1
+
+	# subshell to prevent pollution of caller's IFS
+	(
+	IFS=:
+	for p in $PATH; do
+		if [ -x "$CROSS_SYS_ROOT/$p/$1" ]; then
+			echo "$CROSS_SYS_ROOT/$p/$1"
+			return 0
+		fi
+	done
+	return 1
+	)
+}
+
+has_or_fail() {
+	has "$1" >/dev/null || fail "can't find $1"
+}
+
+has_header() {
+	case $1 in
+		/*) ;;
+		*) set -- "/usr/include/$1" ;;
+	esac
+
+	check_sys_root || return 1
+
+	test -r "$CROSS_SYS_ROOT$1"
+	return $?
+}
+
+has_lib() {
+	check_sys_root || return 1
+
+	# subshell to prevent pollution of caller's environment
+	(
+	PATH=/sbin:$PATH        # for ldconfig
+
+	# This relatively common in a sys-root; libs are installed but
+	# ldconfig hasn't run there, so ldconfig -p won't work.
+	if [ "$OS" = Linux -a ! -f "$CROSS_SYS_ROOT/etc/ld.so.cache" ]; then
+	    echo "Please run ldconfig -r \"$CROSS_SYS_ROOT\" to generate ld.so.cache"
+	    # fall through; ldconfig test below should fail
+	fi
+	ldconfig -p ${CROSS_SYS_ROOT+-r "$CROSS_SYS_ROOT"} | grep -Fq "$1"
+	return $?
+	)
+}
+
+test_link() {
+	# subshell to trap removal of tmpfile
+	(
+	unset tmpfile
+	trap 'rm -f "$tmpfile"; exit' 0 1 2 15
+	tmpfile=`mktemp` || return 1
+	ld "$@" -o "$tmpfile" >/dev/null 2>&1
+	return $?
+	)
+}
+
+# this function is used commonly above
+check_sys_root() {
+	[ -z "$CROSS_COMPILE" ] && return 0
+	if [ -z "$CROSS_SYS_ROOT" ]; then
+		echo "please set CROSS_SYS_ROOT in the environment"
+		return 1
+	fi
+	if [ ! -d "$CROSS_SYS_ROOT" ]; then
+		echo "no sys-root found at $CROSS_SYS_ROOT"
+		return 1
+	fi
+}
+
+fail() {
+	echo
+	echo " *** `basename "$0"` FAILED${*+: $*}"
+	exit 1
+}