[PATCH 5/6] perl: link to the system zlib instead of a vendored copy

[Ross Burton <ross.burton@arm.com>]

The perl module Compress-Raw-Zlib defaults to using a vendored copy of
the zlib sources which has a number of CVEs.  A newer version of perl
updates this to zlib 1.3.2 to resolve them, but we should be linking to
our zlib recipe instead of the vendored code.

This mitigates CVE-2026-4176 so mark it as not appropriate.

Signed-off-by: Ross Burton <ross.burton@arm.com>
---
 meta/recipes-devtools/perl/perl_5.42.0.bb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/meta/recipes-devtools/perl/perl_5.42.0.bb b/meta/recipes-devtools/perl/perl_5.42.0.bb
index a154bbc0a9b..5992ac2d927 100644
--- a/meta/recipes-devtools/perl/perl_5.42.0.bb
+++ b/meta/recipes-devtools/perl/perl_5.42.0.bb
@@ -59,6 +59,11 @@ CFLAGS:append:toolchain-clang = " -fno-strict-aliasing"
 # Needed with -march=x86-64-v3
 CFLAGS:append:toolchain-gcc:class-target:x86-64 = " -fno-builtin-memcpy -D__NO_STRING_INLINES -U_FORTIFY_SOURCE"
 
+# Link Compress-Raw-Zlib to the system zlib instead of a vendored copy
+EXTRA_OEMAKE += "BUILD_ZLIB=False ZLIB_INCLUDE=${STAGING_INCDIR} ZLIB_LIB=${STAGING_LIBDIR}"
+
+CVE_STATUS[CVE-2026-4176] = "not-applicable-config: we do not use the vendorered zlib"
+
 do_configure:prepend() {
     rm -rf ${B}
     cp -rfp ${S} ${B}
-- 
2.43.0