[PATCH] Improve compatibility with other platforms

[kevans-HZy0K5TPuP5AfugRpC6u6w@public.gmane.org]

This doesn't make things work out of the box necessarily, but it gets us a step
closer.

 - alloca(3) on FreeBSD and OpenBSD, at least, is provided as part of
<stdlib.h>. I make the change here for FreeBSD only, though, as I cannot test it
on OpenBSD.

 - stat -c %s's equivalent on FreeBSD is stat -f %Uz; these differ enough, allow
STATSZ in the environment to specify local replacement for a stat that outputs
size in bytes of an argument.

This greatly reduces, but not eliminates, the magnitude of patch needed to run
the test suite successfully on other platforms. It also helps denote where
changes may be required.

Signed-off-by: Kyle Evans <kevans-HZy0K5TPuP5AfugRpC6u6w@public.gmane.org>
---
 fdtoverlay.c       |  3 +++
 tests/run_tests.sh | 13 +++++++++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/fdtoverlay.c b/fdtoverlay.c
index 7f124fc..7d60021 100644
--- a/fdtoverlay.c
+++ b/fdtoverlay.c
@@ -26,7 +26,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+/* alloc(3) is provided by stdlib.h on some platforms */
+#ifndef __FreeBSD__
 #include <alloca.h>
+#endif
 #include <inttypes.h>
 
 #include <libfdt.h>
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index d36dffb..13c9f1c 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -6,6 +6,11 @@ if [ -z "$CC" ]; then
     CC=gcc
 fi
 
+# stat differs between platforms
+if [ -z "$STATSZ" ]; then
+	STATSZ="stat -c %s"
+fi
+
 export QUIET_TEST=1
 STOP_ON_FAIL=0
 
@@ -114,7 +119,7 @@ run_wrap_error_test () {
 # $2: align base
 check_align () {
     shorten_echo "check_align $@:	"
-    local size=$(stat -c %s "$1")
+    local size=$($STATSZ "$1")
     local align="$2"
     (
 	if [ $(($size % $align)) -eq 0 ] ;then
@@ -714,7 +719,7 @@ fdtput_tests () {
     text=lorem.txt
 
     # Allow just enough space for $text
-    run_dtc_test -O dtb -p $(stat -c %s $text) -o $dtb $dts
+    run_dtc_test -O dtb -p $($STATSZ $text) -o $dtb $dts
 
     # run_fdtput_test <expected-result> <file> <node> <property> <flags> <value>
     run_fdtput_test "a_model" $dtb / model -ts "a_model"
@@ -733,7 +738,7 @@ fdtput_tests () {
     run_fdtput_test "$(cat $text $text)" $dtb /randomnode blob -ts "$(cat $text $text)"
 
     # Start again with a fresh dtb
-    run_dtc_test -O dtb -p $(stat -c %s $text) -o $dtb $dts
+    run_dtc_test -O dtb -p $($STATSZ $text) -o $dtb $dts
 
     # Node creation
     run_wrap_error_test $DTPUT $dtb -c /baldrick sod
@@ -761,7 +766,7 @@ fdtput_tests () {
     run_wrap_test $DTPUT $dtb -cp /chosen/son
 
     # Start again with a fresh dtb
-    run_dtc_test -O dtb -p $(stat -c %s $text) -o $dtb $dts
+    run_dtc_test -O dtb -p $($STATSZ $text) -o $dtb $dts
 
     # Node delete
     run_wrap_test $DTPUT $dtb -c /chosen/node1 /chosen/node2 /chosen/node3
-- 
2.15.1