From b3614254ae00c767a66f332e3044f1bf5e578b46 Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Sat, 7 Mar 2026 16:44:48 +0100
Subject: [PATCH] silence globally

---
 include/curl/curl.h   | 7 +++++--
 include/curl/urlapi.h | 3 ++-
 lib/strerror.c        | 2 ++
 tests/test1119.pl     | 4 +++-
 tests/test1477.pl     | 2 +-
 5 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/include/curl/curl.h b/include/curl/curl.h
index 6961a6c4c1..0514bf57dd 100644
--- a/include/curl/curl.h
+++ b/include/curl/curl.h
@@ -516,6 +516,7 @@ typedef int (*curl_prereq_callback)(void *clientp,
  */
 
 typedef enum {
+  CURLE_SIGNED = -1, /* to ensure signed type, never use! */
   CURLE_OK = 0,
   CURLE_UNSUPPORTED_PROTOCOL,    /* 1 */
   CURLE_FAILED_INIT,             /* 2 */
@@ -2605,7 +2606,8 @@ struct curl_forms {
  *
  ***************************************************************************/
 typedef enum {
-  CURL_FORMADD_OK             CURL_DEPRECATED(7.56.0, ""), /* 1st, no error */
+  CURL_FORMADD_SIGNED = -1, /* to ensure signed type, never use! */
+  CURL_FORMADD_OK             CURL_DEPRECATED(7.56.0, "") = 0, /* 1st, no error */
 
   CURL_FORMADD_MEMORY         CURL_DEPRECATED(7.56.0, ""),
   CURL_FORMADD_OPTION_TWICE   CURL_DEPRECATED(7.56.0, ""),
@@ -3055,7 +3057,8 @@ typedef void (*curl_unlock_function)(CURL *handle,
                                      void *userptr);
 
 typedef enum {
-  CURLSHE_OK,  /* all is fine */
+  CURLSHE_SIGNED = -1, /* to ensure signed type, never use! */
+  CURLSHE_OK = 0,  /* all is fine */
   CURLSHE_BAD_OPTION, /* 1 */
   CURLSHE_IN_USE,     /* 2 */
   CURLSHE_INVALID,    /* 3 */
diff --git a/include/curl/urlapi.h b/include/curl/urlapi.h
index b1f3a2316b..fb633871a5 100644
--- a/include/curl/urlapi.h
+++ b/include/curl/urlapi.h
@@ -32,7 +32,8 @@ extern "C" {
 
 /* the error codes for the URL API */
 typedef enum {
-  CURLUE_OK,
+  CURLUE_SIGNED = -1, /* to ensure signed type, never use! */
+  CURLUE_OK = 0,
   CURLUE_BAD_HANDLE,          /* 1 */
   CURLUE_BAD_PARTPOINTER,     /* 2 */
   CURLUE_MALFORMED_INPUT,     /* 3 */
diff --git a/lib/strerror.c b/lib/strerror.c
index 1e97c2829d..5fb0bd341d 100644
--- a/lib/strerror.c
+++ b/lib/strerror.c
@@ -404,6 +404,7 @@ const char *curl_share_strerror(CURLSHcode error)
   case CURLSHE_NOT_BUILT_IN:
     return "Feature not enabled in this library";
 
+  case CURLSHE_SIGNED:
   case CURLSHE_LAST:
     break;
   }
@@ -517,6 +518,7 @@ const char *curl_url_strerror(CURLUcode error)
   case CURLUE_TOO_LARGE:
     return "A value or data field is larger than allowed";
 
+  case CURLUE_SIGNED:
   case CURLUE_LAST:
     break;
   }
diff --git a/tests/test1119.pl b/tests/test1119.pl
index 9004696f6f..8db19ef6c0 100755
--- a/tests/test1119.pl
+++ b/tests/test1119.pl
@@ -179,8 +179,10 @@ for my $e (sort @syms) {
     # *_LAST and *_LASTENTRY are just suffix for the placeholders used for the
     # last entry in many enum series.
     #
+    # *_SIGNED is a suffix to make enums a signed type.
+    #
 
-    if($e =~ /(OBSOLETE|CURLE_RESERVED|^CURL_EXTERN|^CURLINC_|_LAST\z|_LASTENTRY\z|^CURL_TEMP_)/) {
+    if($e =~ /(OBSOLETE|CURLE_RESERVED|^CURL_EXTERN|^CURLINC_|_LAST\z|_LASTENTRY\z|_SIGNED\z|^CURL_TEMP_)/) {
         $ignored++;
         next;
     }
diff --git a/tests/test1477.pl b/tests/test1477.pl
index 6a4476bee1..4fe8c3ad3f 100755
--- a/tests/test1477.pl
+++ b/tests/test1477.pl
@@ -49,7 +49,7 @@ sub scanheader {
         $line++;
         if($_ =~ /^  (CURL(E|UE|SHE|HE|M)_[A-Z0-9_]*)/) {
             my ($name)=($1);
-            if(($name !~ /(OBSOLETE|CURLE_RESERVED)/) && ($name !~ /_LAST\z/)) {
+            if(($name !~ /(OBSOLETE|CURLE_RESERVED)/) && ($name !~ /(_LAST|_SIGNED)\z/)) {
                 push @hnames, $name;
                 if($wherefrom{$name}) {
                     print STDERR "double: $name\n";