diff --git a/_gdb.spec.Patch.include b/_gdb.spec.Patch.include
index e2b909c..6d16d7e 100644
--- a/_gdb.spec.Patch.include
+++ b/_gdb.spec.Patch.include
@@ -309,3 +309,7 @@ Patch073: gdb-backport-fix-break-main-file-remove-fail.patch
 # (Keith Seitz, build/22395)
 Patch074: gdb-sw22395-constify-target_desc.patch
 
+# libiberty: Fix C89-isms in configure tests
+# (Florian Weimer, RHBZ 2143992)
+Patch075: gdb-rhbz2143992-libiberty-fix-c89isms-in-configure.patch
+
diff --git a/_gdb.spec.patch.include b/_gdb.spec.patch.include
index affe771..f5bd893 100644
--- a/_gdb.spec.patch.include
+++ b/_gdb.spec.patch.include
@@ -72,3 +72,4 @@
 %patch072 -p1
 %patch073 -p1
 %patch074 -p1
+%patch075 -p1
diff --git a/_patch_order b/_patch_order
index bc9565c..90e7185 100644
--- a/_patch_order
+++ b/_patch_order
@@ -72,3 +72,4 @@ gdb-rhbz1553104-s390x-arch12-test.patch
 gdb-backport-readline_support.patch
 gdb-backport-fix-break-main-file-remove-fail.patch
 gdb-sw22395-constify-target_desc.patch
+gdb-rhbz2143992-libiberty-fix-c89isms-in-configure.patch
diff --git a/gdb-6.6-buildid-locate-rpm.patch b/gdb-6.6-buildid-locate-rpm.patch
index efaf989..6c3b728 100644
--- a/gdb-6.6-buildid-locate-rpm.patch
+++ b/gdb-6.6-buildid-locate-rpm.patch
@@ -305,7 +305,7 @@ diff --git a/gdb/configure b/gdb/configure
    YACC        The `Yet Another Compiler Compiler' implementation to use.
                Defaults to the first program found out of: `bison -y', `byacc',
                `yacc'.
-@@ -6634,6 +6646,494 @@ _ACEOF
+@@ -6634,6 +6646,495 @@ _ACEOF
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_auto_load_safe_path" >&5
  $as_echo "$with_auto_load_safe_path" >&6; }
  
@@ -369,6 +369,7 @@ diff --git a/gdb/configure b/gdb/configure
 +#include <rpm/rpmlib.h>
 +#include <dlfcn.h>
 +#include <errno.h>
++#include <string.h>
 +
 +int
 +main ()
@@ -803,7 +804,7 @@ diff --git a/gdb/configure b/gdb/configure
 diff --git a/gdb/configure.ac b/gdb/configure.ac
 --- a/gdb/configure.ac
 +++ b/gdb/configure.ac
-@@ -153,6 +153,199 @@ AC_DEFINE_DIR(AUTO_LOAD_SAFE_PATH, escape_dir,
+@@ -153,6 +153,200 @@ AC_DEFINE_DIR(AUTO_LOAD_SAFE_PATH, escape_dir,
  	      [Directories safe to hold auto-loaded files.])
  AC_MSG_RESULT([$with_auto_load_safe_path])
  
@@ -853,6 +854,7 @@ diff --git a/gdb/configure.ac b/gdb/configure.ac
 +#include <rpm/rpmlib.h>
 +#include <dlfcn.h>
 +#include <errno.h>
++#include <string.h>
 +  ]], [[
 +    void *h;
 +    const char *const *rpmverp;
diff --git a/gdb-fedora-libncursesw.patch b/gdb-fedora-libncursesw.patch
index 7456bf8..a1181d8 100644
--- a/gdb-fedora-libncursesw.patch
+++ b/gdb-fedora-libncursesw.patch
@@ -12,7 +12,7 @@ https://bugzilla.redhat.com/show_bug.cgi?id=1270534
 diff --git a/gdb/configure b/gdb/configure
 --- a/gdb/configure
 +++ b/gdb/configure
-@@ -9567,6 +9567,7 @@ if test x"$prefer_curses" = xyes; then
+@@ -9568,6 +9568,7 @@ if test x"$prefer_curses" = xyes; then
    # search /usr/local/include, if ncurses is installed in /usr/local.  A
    # default installation of ncurses on alpha*-dec-osf* will lead to such
    # a situation.
@@ -20,7 +20,7 @@ diff --git a/gdb/configure b/gdb/configure
    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing waddstr" >&5
  $as_echo_n "checking for library containing waddstr... " >&6; }
  if ${ac_cv_search_waddstr+:} false; then :
-@@ -9591,7 +9592,7 @@ return waddstr ();
+@@ -9592,7 +9593,7 @@ return waddstr ();
    return 0;
  }
  _ACEOF
@@ -29,7 +29,7 @@ diff --git a/gdb/configure b/gdb/configure
    if test -z "$ac_lib"; then
      ac_res="none required"
    else
-@@ -9665,6 +9666,7 @@ case $host_os in
+@@ -9666,6 +9667,7 @@ case $host_os in
  esac
  
  # These are the libraries checked by Readline.
@@ -37,7 +37,7 @@ diff --git a/gdb/configure b/gdb/configure
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing tgetent" >&5
  $as_echo_n "checking for library containing tgetent... " >&6; }
  if ${ac_cv_search_tgetent+:} false; then :
-@@ -9689,7 +9691,7 @@ return tgetent ();
+@@ -9690,7 +9692,7 @@ return tgetent ();
    return 0;
  }
  _ACEOF
@@ -49,7 +49,7 @@ diff --git a/gdb/configure b/gdb/configure
 diff --git a/gdb/configure.ac b/gdb/configure.ac
 --- a/gdb/configure.ac
 +++ b/gdb/configure.ac
-@@ -713,7 +713,8 @@ if test x"$prefer_curses" = xyes; then
+@@ -714,7 +714,8 @@ if test x"$prefer_curses" = xyes; then
    # search /usr/local/include, if ncurses is installed in /usr/local.  A
    # default installation of ncurses on alpha*-dec-osf* will lead to such
    # a situation.
@@ -59,7 +59,7 @@ diff --git a/gdb/configure.ac b/gdb/configure.ac
  
    if test "$ac_cv_search_waddstr" != no; then
      curses_found=yes
-@@ -755,7 +756,8 @@ case $host_os in
+@@ -756,7 +757,8 @@ case $host_os in
  esac
  
  # These are the libraries checked by Readline.
diff --git a/gdb-rhbz2143992-libiberty-fix-c89isms-in-configure.patch b/gdb-rhbz2143992-libiberty-fix-c89isms-in-configure.patch
new file mode 100644
index 0000000..89f51b0
--- /dev/null
+++ b/gdb-rhbz2143992-libiberty-fix-c89isms-in-configure.patch
@@ -0,0 +1,109 @@
+From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
+From: Keith Seitz <keiths@redhat.com>
+Date: Tue, 29 Nov 2022 13:43:34 -0800
+Subject: gdb-rhbz2143992-libiberty-fix-c89isms-in-configure.patch
+
+;; libiberty: Fix C89-isms in configure tests
+;; (Florian Weimer, RHBZ 2143992)
+
+    libiberty/
+
+            * acinclude.m4 (ac_cv_func_strncmp_works): Add missing
+            int return type and parameter list to the definition of main.
+            Include <stdlib.h> and <string.h> for prototypes.
+            (ac_cv_c_stack_direction): Add missing
+            int return type and parameter list to the definitions of
+            main, find_stack_direction.  Include <stdlib.h> for exit
+            prototype.
+            * configure: Regenerate.
+
+diff --git a/libiberty/acinclude.m4 b/libiberty/acinclude.m4
+--- a/libiberty/acinclude.m4
++++ b/libiberty/acinclude.m4
+@@ -24,6 +24,8 @@ AC_CACHE_CHECK([for working strncmp], ac_cv_func_strncmp_works,
+ [AC_TRY_RUN([
+ /* Test by Jim Wilson and Kaveh Ghazi.
+    Check whether strncmp reads past the end of its string parameters. */
++#include <stdlib.h>
++#include <string.h>
+ #include <sys/types.h>
+ 
+ #ifdef HAVE_FCNTL_H
+@@ -51,7 +53,8 @@ AC_CACHE_CHECK([for working strncmp], ac_cv_func_strncmp_works,
+ 
+ #define MAP_LEN 0x10000
+ 
+-main ()
++int
++main (void)
+ {
+ #if defined(HAVE_MMAP) || defined(HAVE_MMAP_ANYWHERE)
+   char *p;
+@@ -157,7 +160,10 @@ if test $ac_cv_os_cray = yes; then
+ fi
+ 
+ AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
+-[AC_TRY_RUN([find_stack_direction ()
++[AC_TRY_RUN([#include <stdlib.h>
++
++int
++find_stack_direction (void)
+ {
+   static char *addr = 0;
+   auto char dummy;
+@@ -169,7 +175,9 @@ AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
+   else
+     return (&dummy > addr) ? 1 : -1;
+ }
+-main ()
++
++int
++main (void)
+ {
+   exit (find_stack_direction() < 0);
+ }],
+diff --git a/libiberty/configure b/libiberty/configure
+--- a/libiberty/configure
++++ b/libiberty/configure
+@@ -6918,7 +6918,10 @@ else
+ else
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+-find_stack_direction ()
++#include <stdlib.h>
++
++int
++find_stack_direction (void)
+ {
+   static char *addr = 0;
+   auto char dummy;
+@@ -6930,7 +6933,9 @@ find_stack_direction ()
+   else
+     return (&dummy > addr) ? 1 : -1;
+ }
+-main ()
++
++int
++main (void)
+ {
+   exit (find_stack_direction() < 0);
+ }
+@@ -7755,6 +7760,8 @@ else
+ 
+ /* Test by Jim Wilson and Kaveh Ghazi.
+    Check whether strncmp reads past the end of its string parameters. */
++#include <stdlib.h>
++#include <string.h>
+ #include <sys/types.h>
+ 
+ #ifdef HAVE_FCNTL_H
+@@ -7782,7 +7789,8 @@ else
+ 
+ #define MAP_LEN 0x10000
+ 
+-main ()
++int
++main (void)
+ {
+ #if defined(HAVE_MMAP) || defined(HAVE_MMAP_ANYWHERE)
+   char *p;
diff --git a/gdb.spec b/gdb.spec
index db60cd0..09d4246 100644
--- a/gdb.spec
+++ b/gdb.spec
@@ -1186,6 +1186,11 @@ fi
 %endif
 
 %changelog
+* Wed Nov 30 2022 Keith Seitz <keiths@redhat.com>
+- Backport "libiberty: Fix C89-isms in configure tests" and do likewise in
+  gdb-6.6-buildid-locate-rpm.patch.
+  (Florian Weimer, RHBZ 2143992)
+
 * Wed Nov 23 2022 Kevin Buettner <kevinb@redhat.com>
 - Remove gdb-6.3-inheritancetest-20050726.patch.  Upstream testcase
   gdb.cp/impl-this.exp tests the printing of an instance variable from