[binutils-gdb] Add two new warnings to warning.m4

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=eba7a4ccfb5e58e1701bcb22d4f5203804dd19b8

commit eba7a4ccfb5e58e1701bcb22d4f5203804dd19b8
Author: Tom Tromey <[email protected]>
Date:   Wed Jun 3 13:03:31 2026 -0600

    Add two new warnings to warning.m4
    
    I recently learned that GCC has improved -Wdangling-reference and
    added -Wunterminated-string-initialization.  Both of these seem
    sensible to me, so this patch adds them to warning.m4.
    
    gdb rebuilds cleanly with this in place on x86-64 Fedora 43.
    
    Reviewed-By: Tom de Vries <[email protected]>

Diff:
---
 gdb/configure         | 2 ++
 gdbserver/configure   | 2 ++
 gdbsupport/configure  | 2 ++
 gdbsupport/warning.m4 | 2 ++
 4 files changed, 8 insertions(+)

diff --git a/gdb/configure b/gdb/configure
index 17c95930f60..80931d10bef 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -31580,6 +31580,7 @@ fi
 # The options we'll try to enable.
 build_warnings=" \
 -Wall \
+-Wdangling-reference \
 -Wdeprecated-copy \
 -Wdeprecated-copy-dtor \
 -Wduplicated-cond \
@@ -31597,6 +31598,7 @@ build_warnings=" \
 -Wshadow=local \
 -Wstrict-null-sentinel \
 -Wsuggest-override \
+-Wunterminated-string-initialization \
 -Wunused-but-set-parameter \
 -Wunused-but-set-variable \
 -Wunused-const-variable=1 \
diff --git a/gdbserver/configure b/gdbserver/configure
index 0159da6bdf4..46faecc3a20 100755
--- a/gdbserver/configure
+++ b/gdbserver/configure
@@ -13448,6 +13448,7 @@ fi
 # The options we'll try to enable.
 build_warnings=" \
 -Wall \
+-Wdangling-reference \
 -Wdeprecated-copy \
 -Wdeprecated-copy-dtor \
 -Wduplicated-cond \
@@ -13465,6 +13466,7 @@ build_warnings=" \
 -Wshadow=local \
 -Wstrict-null-sentinel \
 -Wsuggest-override \
+-Wunterminated-string-initialization \
 -Wunused-but-set-parameter \
 -Wunused-but-set-variable \
 -Wunused-const-variable=1 \
diff --git a/gdbsupport/configure b/gdbsupport/configure
index 584a80ef825..0bc9ff1db9a 100755
--- a/gdbsupport/configure
+++ b/gdbsupport/configure
@@ -14123,6 +14123,7 @@ fi
 # The options we'll try to enable.
 build_warnings=" \
 -Wall \
+-Wdangling-reference \
 -Wdeprecated-copy \
 -Wdeprecated-copy-dtor \
 -Wduplicated-cond \
@@ -14140,6 +14141,7 @@ build_warnings=" \
 -Wshadow=local \
 -Wstrict-null-sentinel \
 -Wsuggest-override \
+-Wunterminated-string-initialization \
 -Wunused-but-set-parameter \
 -Wunused-but-set-variable \
 -Wunused-const-variable=1 \
diff --git a/gdbsupport/warning.m4 b/gdbsupport/warning.m4
index 718ac34aa3c..3148feb740a 100644
--- a/gdbsupport/warning.m4
+++ b/gdbsupport/warning.m4
@@ -38,6 +38,7 @@ fi
 # The options we'll try to enable.
 build_warnings=" \
 -Wall \
+-Wdangling-reference \
 -Wdeprecated-copy \
 -Wdeprecated-copy-dtor \
 -Wduplicated-cond \
@@ -55,6 +56,7 @@ build_warnings=" \
 -Wshadow=local \
 -Wstrict-null-sentinel \
 -Wsuggest-override \
+-Wunterminated-string-initialization \
 -Wunused-but-set-parameter \
 -Wunused-but-set-variable \
 -Wunused-const-variable=1 \