lib: supress deprecation warnings in apple builds

On apple builds, the gssapi/ldap/securetransport headers deprecate
almost everything which leads to a wall of compiler warnings on use in
code.

Suppress those warning that may hide other warnings/errors.

Closes #15763

.github/workflows/macos.yml

@@ -45,9 +45,6 @@ permissions: {}
 #
 # For Secure Transport, curl implements features that require a target
 # newer than the 10.8 required by `CFURLCreateDataAndPropertiesFromResource`.
-# In this case `-Wno-deprecated-declarations` still comes handy to pacify
-# deprecation warnings, though the real solution would be to avoid calling
-# that function.
 
 env:
   LDFLAGS: -w  # suppress 'object file was built for newer macOS version than being linked' warnings
@@ -118,7 +115,6 @@ jobs:
             compiler: clang
             configure: --enable-debug --with-secure-transport --with-libssh2=$(brew --prefix libssh2)
             macos-version-min: '10.12'  # for monotonic timers
-            cflags: '-Wno-deprecated-declarations'
           - name: 'SecureTransport libssh2'
             compiler: gcc-12
             configure: --enable-debug --with-secure-transport --with-libssh2=$(brew --prefix libssh2)

lib/curl_gssapi.c

@@ -40,6 +40,11 @@
 #define CURL_ALIGN8
 #endif
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 gss_OID_desc Curl_spnego_mech_oid CURL_ALIGN8 = {
   6, (char *)"\x2b\x06\x01\x05\x05\x02"
 };
@@ -149,4 +154,8 @@ void Curl_gss_log_error(struct Curl_easy *data, const char *prefix,
 #endif
 }
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif /* HAVE_GSSAPI */

lib/krb5.c

@@ -63,6 +63,11 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 static CURLcode ftpsend(struct Curl_easy *data, struct connectdata *conn,
                         const char *cmd)
 {
@@ -924,4 +929,8 @@ Curl_sec_end(struct connectdata *conn)
   conn->mech = NULL;
 }
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif /* HAVE_GSSAPI && !CURL_DISABLE_FTP */

lib/ldap.c

@@ -26,6 +26,11 @@
 
 #if !defined(CURL_DISABLE_LDAP) && !defined(USE_OPENLDAP)
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 /*
  * Notice that USE_OPENLDAP is only a source code selection switch. When
  * libcurl is built with USE_OPENLDAP defined the libcurl source code that
@@ -1113,4 +1118,9 @@ static void _ldap_free_urldesc(LDAPURLDesc *ludp)
   free(ludp);
 }
 #endif  /* !HAVE_LDAP_URL_PARSE */
+
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif  /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */

lib/socks_gssapi.c

@@ -42,6 +42,11 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 #define MAX_GSS_LEN 1024
 
 static gss_ctx_id_t gss_context = GSS_C_NO_CONTEXT;
@@ -537,4 +542,8 @@ CURLcode Curl_SOCKS5_gssapi_negotiate(struct Curl_cfilter *cf,
   return CURLE_OK;
 }
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif /* HAVE_GSSAPI && !CURL_DISABLE_PROXY */

lib/vauth/krb5_gssapi.c

@@ -42,6 +42,11 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 /*
  * Curl_auth_is_gssapi_supported()
  *
@@ -321,4 +326,8 @@ void Curl_auth_cleanup_gssapi(struct kerberos5data *krb5)
   }
 }
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif /* HAVE_GSSAPI && USE_KERBEROS5 */

lib/vauth/spnego_gssapi.c

@@ -42,6 +42,11 @@
 #include "curl_memory.h"
 #include "memdebug.h"
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 /*
  * Curl_auth_is_spnego_supported()
  *
@@ -288,4 +293,8 @@ void Curl_auth_cleanup_spnego(struct negotiatedata *nego)
   nego->havemultiplerequests = FALSE;
 }
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic pop
+#endif
+
 #endif /* HAVE_GSSAPI && USE_SPNEGO */

lib/vtls/sectransp.c

@@ -51,6 +51,11 @@
 #pragma GCC diagnostic ignored "-Waddress"
 #endif
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 #include <limits.h>
 
 #include <Security/Security.h>
@@ -2770,6 +2775,10 @@ const struct Curl_ssl Curl_ssl_sectransp = {
   NULL,                               /* get_channel_binding */
 };
 
+#if defined(__GNUC__) && defined(__APPLE__)
+#pragma GCC diagnostic pop
+#endif
+
 #ifdef __GNUC__
 #pragma GCC diagnostic pop
 #endif