[OE-core][scarthgap][PATCH 2/2] libpcre2: fix RunGrepTest Failure on Busybox systems

[Shaik Moin <careers.myinfo@gmail.com>]

The PCRE2 RunGrepTest script uses the Gnu Coreutils form:
head -1

Busybox does not support this shorthand option and reports:
head: invalid option --'1'

which cause the grep tests fail when running ptest on yocto.
Replace head -1 with head -n 1 . This makes RunGrepTest work
correctly.

Signed-off-by: Shaik Moin <moins@kpit.com>
---
 .../0001-test-Fix-head-1-Busybox.patch        | 38 +++++++++++++++++++
 .../recipes-support/libpcre/libpcre2_10.43.bb |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 meta/recipes-support/libpcre/libpcre2/0001-test-Fix-head-1-Busybox.patch

diff --git a/meta/recipes-support/libpcre/libpcre2/0001-test-Fix-head-1-Busybox.patch b/meta/recipes-support/libpcre/libpcre2/0001-test-Fix-head-1-Busybox.patch
new file mode 100644
index 0000000000..abfc995cee
--- /dev/null
+++ b/meta/recipes-support/libpcre/libpcre2/0001-test-Fix-head-1-Busybox.patch
@@ -0,0 +1,38 @@
+From 1b2c3d4e5f6a7b8c9d0 Mon Sep 17 00:00:00 2001
+From: Shaik Moin <moins@kpit.com>
+Date: Tue, 18 Nov 2025 10:30:00 +0530
+Subject: [PATCH] tests: Fix head options for BusyBox compatibility
+
+BusyBox does not accept the GNU coreutils shorthand forms:
+  head -1
+ 
+It requires:
+  head -n 1
+ 
+This causes RunGrepTest test data to fail on
+Yocto-based systems that use BusyBox.
+ 
+Replace all occurrences of `head -1` → `head -n 1`
+ 
+This aligns the scripts with POSIX syntax and fixes failing
+grep tests in RunGrepTest (including testtrygrep).
+ 
+Upstream-Status: Inappropriate [oe-specific]
+Signed-off-by: Shaik Moin <moins@kpit.com>
+---
+ 
+diff --git a/RunGrepTest b/RunGrepTest
+index 1c7bbd2..ab4f310 100755
+--- a/RunGrepTest
++++ b/RunGrepTest
+@@ -728,7 +728,7 @@ echo "---------------------------- Test
+ echo "RC=$?" >>testtrygrep
+
+ echo "---------------------------- Test 132 -----------------------------" >>testtrygrep
+-(cd $srcdir; exec 3<testdata/grepinput; $valgrind $vjs $pcre2grep -m1 -A3 '^match' <&3; echo '---'; head -1 <&3; exec 3<&-) >>testtrygrep 2>&1
++(cd $srcdir; exec 3<testdata/grepinput; $valgrind $vjs $pcre2grep -m1 -A3 '^match' <&3; echo '---'; head -n 1 <&3; exec 3<&-) >>testtrygrep 2>&1
+ echo "RC=$?" >>testtrygrep
+
+ echo "---------------------------- Test 133 -----------------------------" >>testtrygrep
+-- 
+2.34.1
diff --git a/meta/recipes-support/libpcre/libpcre2_10.43.bb b/meta/recipes-support/libpcre/libpcre2_10.43.bb
index 57c4f0d0e7..f250f35584 100644
--- a/meta/recipes-support/libpcre/libpcre2_10.43.bb
+++ b/meta/recipes-support/libpcre/libpcre2_10.43.bb
@@ -12,6 +12,7 @@ LIC_FILES_CHKSUM = "file://LICENCE;md5=321a5eb46acae6b6c1ff2c7a866d836a"
 
 SRC_URI = "${GITHUB_BASE_URI}/download/pcre2-${PV}/pcre2-${PV}.tar.bz2 \
            file://run-ptest \
+           file://0001-test-Fix-head-1-Busybox.patch \
 "
 
 GITHUB_BASE_URI = "https://github.com/PCRE2Project/pcre2/releases"
-- 
2.34.1