libs::elfutils: fix build with compat-toolchain

recipes/libs/elfutils.yaml

@@ -1,4 +1,4 @@
-inherit: [autotools]
+inherit: [autotools, patch]
 
 metaEnvironment:
     PKG_VERSION: "0.194"
@@ -16,6 +16,10 @@ checkoutSCM:
     digestSHA256: 09e2ff033d39baa8b388a2d7fbc5390bfde99ae3b7c67c7daaf7433fbcf0f01e
     stripComponents: 1
 
+checkoutDeterministic: True
+checkoutScript: |
+    patchApplySeries $<@elfutils/*.patch@>
+
 buildTools: [m4]
 buildScript: |
     mkdir -p all

recipes/libs/elfutils/0001-link_map.c-Declare-name_no_sysroot-only-if-openat2.patch

@@ -0,0 +1,51 @@
+From 1bee26c4d7d787eebbebca2a2ad3c5f3d06528a5 Mon Sep 17 00:00:00 2001
+From: Aaron Merey <amerey@redhat.com>
+Date: Mon, 27 Oct 2025 21:49:31 -0400
+Subject: [PATCH] link_map.c: Declare name_no_sysroot only if openat2
+ RESOLVE_IN_ROOT is supported
+
+Rename variable n to name_no_sysroot.  Declare name_no_sysroot only if
+openat2 RESOLVE_IN_ROOT is supported to avoid an unused variable warning.
+
+https://sourceware.org/bugzilla/show_bug.cgi?id=33581
+
+Signed-off-by: Aaron Merey <amerey@redhat.com>
+---
+ libdwfl/link_map.c | 11 +++++++----
+ 1 file changed, 7 insertions(+), 4 deletions(-)
+
+diff --git a/libdwfl/link_map.c b/libdwfl/link_map.c
+index 013a415d..5f934131 100644
+--- a/libdwfl/link_map.c
++++ b/libdwfl/link_map.c
+@@ -431,12 +431,14 @@ report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
+
+ 	  if (sysroot && !name_in_sysroot)
+ 	    {
+-	      const char *n = NULL;
+-
+ 	      if (asprintf (&sysroot_name, "%s%s", sysroot, name) < 0)
+ 		return release_buffer (&memory_closure, &buffer, &buffer_available, -1);
+
+-	      n = name;
++#ifdef HAVE_OPENAT2_RESOLVE_IN_ROOT
++	      /* The original name does not contain the sysroot as a prefix.
++		 Save this for use with openat2.  */
++	      const char *name_no_sysroot = name;
++#endif
+ 	      name = sysroot_name;
+
+ #ifdef HAVE_OPENAT2_RESOLVE_IN_ROOT
+@@ -451,7 +453,8 @@ report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
+ 	      if (sysrootfd < 0)
+ 		return -1;
+
+-	      fd = syscall (SYS_openat2, sysrootfd, n, &how, sizeof(how));
++	      fd = syscall (SYS_openat2, sysrootfd, name_no_sysroot,
++			    &how, sizeof(how));
+ 	      err = fd < 0 ? -errno : 0;
+
+ 	      close (sysrootfd);
+-- 
+2.43.7
+