From aca7d808c3f77b53acbaec9b0a11b2a7c0ea0abc Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Sun, 29 Oct 2023 20:37:20 +0000
Subject: [PATCH] build: fix compiler warning with auths disabled

```
./curl/lib/http.c:979:12: warning: unused function 'is_valid_auth_separator' [-Wunused-function]
static int is_valid_auth_separator(char ch)
           ^
5 warnings generated.
```

Follow-up to e92edfbef64448ef461117769881f3ed776dec4e #11490

Closes #12227
---
 lib/http.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/lib/http.c b/lib/http.c
index d7e841fd9a..eef7802013 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -970,17 +970,21 @@ Curl_http_output_auth(struct Curl_easy *data,
 }
 #endif
 
+#if defined(USE_SPNEGO) || defined(USE_NTLM) || \
+  !defined(CURL_DISABLE_DIGEST_AUTH) || \
+  !defined(CURL_DISABLE_BASIC_AUTH) || \
+  !defined(CURL_DISABLE_BEARER_AUTH)
+static int is_valid_auth_separator(char ch)
+{
+  return ch == '\0' || ch == ',' || ISSPACE(ch);
+}
+#endif
+
 /*
  * Curl_http_input_auth() deals with Proxy-Authenticate: and WWW-Authenticate:
  * headers. They are dealt with both in the transfer.c main loop and in the
  * proxy CONNECT loop.
  */
-
-static int is_valid_auth_separator(char ch)
-{
-  return ch == '\0' || ch == ',' || ISSPACE(ch);
-}
-
 CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
                               const char *auth) /* the first non-space */
 {