From d3d8de3a5ab5f002dca86c624f7d8b132cf1eb9a Mon Sep 17 00:00:00 2001
From: Thomas Beutlich <thomas.beutlich@apluss.de>
Date: Tue, 13 Aug 2024 18:53:17 +0200
Subject: [PATCH] Check if diff supports the --strip-trailing-cr option

---
 contrib/tests/shpproj.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/contrib/tests/shpproj.sh b/contrib/tests/shpproj.sh
index 229b269..9eefa0d 100755
--- a/contrib/tests/shpproj.sh
+++ b/contrib/tests/shpproj.sh
@@ -21,12 +21,12 @@ readonly SCRIPTDIR=$(dirname "$0")
 
 "${SHPDUMP:-$top_builddir/shpdump}" -precision 8 "test" > "test.out"
 
-is_windows() {
-	[ -n "$WINDIR" ] || uname | grep -q "MINGW"
+supports_strip_trailing_cr() {
+	diff --help 2>/dev/null | grep -q -- '--strip-trailing-cr'
 }
 
 run_diff() {
-	if is_windows; then
+	if supports_strip_trailing_cr; then
 		diff --strip-trailing-cr "$SCRIPTDIR/expect.out" "test.out"
 	else
 		diff "$SCRIPTDIR/expect.out" "test.out"