Backport ifdef check for register knowledge

Resolves: RHEL-65743

0023-libsysprof-check-for-PERF_REG_EXTENDED_MASK-availabi.patch

@@ -0,0 +1,29 @@
+From 83d4d630520d6db875951c301e2320bf7c28109f Mon Sep 17 00:00:00 2001
+From: Christian Hergert <chergert@redhat.com>
+Date: Fri, 8 Nov 2024 11:42:04 -0800
+Subject: [PATCH] libsysprof: check for PERF_REG_EXTENDED_MASK availability
+
+---
+ src/libsysprof/sysprof-user-sampler.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/src/libsysprof/sysprof-user-sampler.c b/src/libsysprof/sysprof-user-sampler.c
+index 1ae3ea27..44b4d318 100644
+--- a/src/libsysprof/sysprof-user-sampler.c
++++ b/src/libsysprof/sysprof-user-sampler.c
+@@ -49,7 +49,11 @@
+ #define SYSPROF_ARCH_PREFERRED_REGS DWARF_NEEDED_REGS
+ /* TODO: add other architectures, imitating the linux tools/perf tree */
+ #else
+-# define SYSPROF_ARCH_PREFERRED_REGS PERF_REG_EXTENDED_MASK
++# ifdef PERF_REG_EXTENDED_MASK
++#  define SYSPROF_ARCH_PREFERRED_REGS PERF_REG_EXTENDED_MASK
++# else
++#  define SYSPROF_ARCH_PREFERRED_REGS 0
++# endif
+ #endif /* _ASM_{arch}_PERF_REGS_H */
+ 
+ #define N_WAKEUP_EVENTS 149
+-- 
+2.46.1
+

sysprof.spec

@@ -42,6 +42,7 @@ Patch:          0019-sysprof-default-stack-capturing-as-enabled.patch
 Patch:          0020-live-unwinder-disable-test-in-build.patch
 Patch:          0021-sysprof-user-sampler-implement-await-for-FDs.patch
 Patch:          0022-sysprof-lower-libpanel-requirement.patch
+Patch:          0023-libsysprof-check-for-PERF_REG_EXTENDED_MASK-availabi.patch
 
 BuildRequires:  gcc
 BuildRequires:  gcc-c++