Makefile: Improve auto-detection of ARM cross compiler

This patch moves the scan for an ARM gcc into a separate shell
script. To prevent against recursion issues, the new script adds
"-maxdepth 1" to the find invocation; and it now also correctly
handles directories in $PATH that contain spaces in their name.

Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

1 files changed, 13 insertions, 0 deletions

diff --git a/find-arm-gcc.sh b/find-arm-gcc.sh
new file mode 100755
index 0000000..ae7bf4b
--- /dev/null
+++ b/find-arm-gcc.sh
@@ -0,0 +1,13 @@
+#
+# Try to locate suitable ARM cross compilers available via $PATH
+# If any are found, this function will output them as a TAB-delimited list
+#
+scan_path () {
+IFS=":"
+for path in $PATH; do
+	find "$path" -maxdepth 1 -executable -name 'arm*-gcc' -printf '%f\t' 2>/dev/null
+done
+}
+
+# Use only the first field from result, and convert it to a toolchain prefix
+scan_path | cut -f 1 | sed -e 's/-gcc/-/'