gnutls: upgrade to 3.8.7.1

A notable change in 3.8.7 is that the linkage to compression libraries
was changed to use a new tool called dlwrap, so these libraries should
be loaded at runtime with dlopen() instead of dynamically linked at
build time.  However, the dlopen() detection fails in cross builds[1] and
it falls back to dynamic linking so this isn't an issue we need to deal
with at present.

Also note that whilst dlwrap is a tool written in rust that needs the
clang includes, it's a maintainer tool and the generated files are in
git, so we should never need to rerun it.

Backport a patch to fix AM_CONDITIONAL to resolve linkage problems.

The 3.8.7.1 tarball is actually just a rebuild of 3.8.7 with the
translations included (which were missing in 3.8.7), so set S explicitly
for this release.

[1] https://gitlab.com/gnutls/gnutls/-/issues/1583

(From OE-Core rev: d38f32f493192fa5965f7271ef6ba5aae33849f5)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/gnutls/gnutls/conditional.patch

@@ -0,0 +1,42 @@
+From 292f96f26d7ce80e4a165c903c4fd569b85c1c1f Mon Sep 17 00:00:00 2001
+From: Daiki Ueno <ueno@gnu.org>
+Date: Fri, 16 Aug 2024 09:42:15 +0900
+Subject: [PATCH] build: fix setting AM_CONDITIONAL for brotli and zstd
+
+As the with_{libbrotli,libzsttd} variables are unset if configured
+with --without-{brotli,zstd}, check the unequality to "no" doesn't
+work; use explicit matching with "yes" instead.
+
+Signed-off-by: Daiki Ueno <ueno@gnu.org>
+
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+---
+ configure.ac | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 95ec4c1515..a476176800 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1158,7 +1158,7 @@ if test x$ac_brotli != xno; then
+ else
+     AC_MSG_RESULT(no)
+ fi
+-AM_CONDITIONAL(HAVE_LIBBROTLI, test "$with_libbrotlienc" != "no" && test "$with_libbrotlidec" != "no")
++AM_CONDITIONAL(HAVE_LIBBROTLI, test "$with_libbrotlienc" = yes && test "$with_libbrotlidec" = yes)
+ 
+ AS_IF([test "$ac_cv_dlopen_soname_works" = yes], [
+     save_CFLAGS=$CFLAGS
+@@ -1203,7 +1203,7 @@ if test x$ac_zstd != xno; then
+ else
+     AC_MSG_RESULT(no)
+ fi
+-AM_CONDITIONAL(HAVE_LIBZSTD, test "$with_libzstd" != "no")
++AM_CONDITIONAL(HAVE_LIBZSTD, test "$with_libzstd" = yes)
+ 
+ AS_IF([test "$ac_cv_dlopen_soname_works" = yes], [
+     save_CFLAGS=$CFLAGS
+-- 
+GitLab
+

meta/recipes-support/gnutls/gnutls_3.8.7.1.bb

@@ -21,11 +21,15 @@ SHRT_VER = "${@d.getVar('PV').split('.')[0]}.${@d.getVar('PV').split('.')[1]}"
 SRC_URI = "https://www.gnupg.org/ftp/gcrypt/gnutls/v${SHRT_VER}/gnutls-${PV}.tar.xz \
            file://arm_eabi.patch \
            file://0001-Creating-.hmac-file-should-be-excuted-in-target-envi.patch \
+           file://conditional.patch \
            file://run-ptest \
            file://Add-ptest-support.patch \
            "
 
-SRC_URI[sha256sum] = "2e1588aae53cb32d43937f1f4eca28febd9c0c7aa1734fc5dd61a7e81e0ebcdd"
+SRC_URI[sha256sum] = "9ca0ddaccce28a74fa18d738744190afb3b0daebef74e6ad686bf7bef99abd60"
+
+# This is only needed for 3.8.7.1, remove when upgrading to 3.8.8 onwards
+S = "${WORKDIR}/gnutls-3.8.7"
 
 inherit autotools texinfo pkgconfig gettext lib_package gtk-doc ptest