orc: fix native build on ubuntu 18

Ubuntu 18 is still a supported distro for Kirkstone, but a recent update
of orc is failing the native build, because it requires a GCC version
newer than the default included in ubuntu 18.

This commit backports a fix which is part of upstream orc 0.4.40.

Signed-off-by: Javier Viguera <javier.viguera@digi.com>

meta-digi-dey/recipes-devtools/orc/orc-0.4.39/0001-x86-work-around-old-GCC-versions-pre-9.0-having-brok.patch

@@ -0,0 +1,62 @@
+From e184d18fd6e4fa18178b30871903cdaa839093fe Mon Sep 17 00:00:00 2001
+From: "L. E. Segovia" <amy@centricular.com>
+Date: Fri, 19 Jul 2024 11:40:28 -0300
+Subject: [PATCH] x86: work around old GCC versions (pre 9.0) having broken
+ xgetbv implementations
+
+See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71659
+
+Part-of: <https://gitlab.freedesktop.org/gstreamer/orc/-/merge_requests/194>
+Upstream-Status: Backport
+---
+ orc/orccpu-x86.c | 25 +++++++++++++++++++++----
+ 1 file changed, 21 insertions(+), 4 deletions(-)
+
+diff --git a/orc/orccpu-x86.c b/orc/orccpu-x86.c
+index 742fa1f28d6c..315f04eed287 100644
+--- a/orc/orccpu-x86.c
++++ b/orc/orccpu-x86.c
+@@ -34,6 +34,19 @@
+ 
+ #ifdef _MSC_VER
+ #  include <intrin.h>
++#elif defined(__GNUC__)
++#if __GNUC__ >= 8 && __GNUC__ < 9
++// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71659
++#  include <xsaveintrin.h>
++#elif __GNUC__ < 8
++#  define ORC_NEEDS_ASM_XSAVE 1
++#endif
++#endif
++
++#if !defined(_MSC_VER) || defined(__clang__)
++#define ORC_TARGET_XSAVE __attribute__((target("xsave")))
++#else
++#define ORC_TARGET_XSAVE
+ #endif
+ 
+ #include <orc/orcdebug.h>
+@@ -304,15 +317,19 @@ orc_x86_cpuid_get_branding_string (void)
+ // Checks if XMM and YMM state are enabled in XCR0.
+ // See 14.3 DETECTION OF INTEL® AVX INSTRUCTIONS on the
+ // Intel® 64 and IA-32 Architectures Software Developer’s Manual
+-#if !defined(_MSC_VER) || defined(__clang__)
+-#define ORC_TARGET_XSAVE __attribute__((target("xsave")))
++#ifdef ORC_NEEDS_ASM_XSAVE
++static orc_bool check_xcr0_ymm()
++{
++  uint32_t xcr0;
++  __asm__ ("xgetbv" : "=a" (xcr0) : "c" (0) : "%edx" );
++  return ((xcr0 & 6U) == 6U);
++}
+ #else
+-#define ORC_TARGET_XSAVE
+-#endif
+ static orc_bool ORC_TARGET_XSAVE check_xcr0_ymm()
+ {
+   return (_xgetbv(0) & 6U) != 0U;
+ }
++#endif
+ 
+ static void
+ orc_x86_cpuid_handle_standard_flags (void)

meta-digi-dey/recipes-devtools/orc/orc_0.4.39.bbappend

@@ -0,0 +1,5 @@
+# Copyright (C) 2024, Digi International Inc.
+
+FILESEXTRAPATHS:prepend := "${THISDIR}/${BP}:"
+
+SRC_URI:append:class-native = " file://0001-x86-work-around-old-GCC-versions-pre-9.0-having-brok.patch"