[binutils-gdb] gdb.base/nodebug.exp: Disable -Wdeprecated-non-prototype

[Pedro Alves]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=1fd3a61338232de33f80db0de085229e0e2c261a

commit 1fd3a61338232de33f80db0de085229e0e2c261a
Author: Pedro Alves <pedro@palves.net>
Date:   Tue Jul 14 00:49:52 2026 +0100

    gdb.base/nodebug.exp: Disable -Wdeprecated-non-prototype
    
    Testing gdb.base/nodebug.exp with Clang shows:
    
     .../gdb.base/nodebug.c:63:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
        63 | multf_noproto (v1, v2)
           | ^
    
    Fix it by making gdb.base/nodebug.exp disable -Wdeprecated-non-prototype.
    
    Tested with Clang 18.1.3 on x86_64-pc-linux-gnu, and Clang 21.0.0git
    on x86_64-pc-windows-msvc.
    
    Approved-By: Tom Tromey <tom@tromey.com>
    Change-Id: Id207053331377abec6918aa1188180d609c74273

Diff:
---
 gdb/testsuite/gdb.base/nodebug.exp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gdb/testsuite/gdb.base/nodebug.exp b/gdb/testsuite/gdb.base/nodebug.exp
index e4138a801da..9cdff5d5560 100644
--- a/gdb/testsuite/gdb.base/nodebug.exp
+++ b/gdb/testsuite/gdb.base/nodebug.exp
@@ -25,6 +25,15 @@ if {[have_compile_flag -std=c99]} {
     lappend exec_opts additional_flags=-std=c99
 }
 
+if {[test_compiler_info "clang-*"]} {
+    # Even with -std=c99, Clang warns like so:
+    #
+    #  warning: a function definition without a prototype is deprecated
+    #  in all versions of C and is not supported in C23
+    #  [-Wdeprecated-non-prototype]
+    lappend exec_opts additional_flags=-Wno-deprecated-non-prototype
+}
+
 if {[test_compiler_info "xlc-*"]} {
     # By default, IBM's xlc compiler doesn't add static variables into the symtab.
     # Use "-qstatsym" to do so.