Compilation warnings when building for iOS min version 13

[jnavarrom]

I did this

Compiling curl for iOS and min versions iOS 13

configure: Configured to build curl/libcurl:

  Host setup:       arm-apple-darwin
  Install prefix:   /usr/local
  Compiler:         /Applications/Xcode.app/Contents/Developer/usr/bin/gcc -arch arm64
   CFLAGS:          -Os -arch arm64 -pipe -no-cpp-precomp -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk -miphoneos-version-min=13.0 -Qunused-arguments -Wno-pointer-bool-conversion -Werror=partial-availability
   CPPFLAGS:        -Os -arch arm64 -pipe -no-cpp-precomp -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk -miphoneos-version-min=13.0 -DNDEBUG
   LDFLAGS:         -Os -arch arm64 -Wl,-dead_strip -miphoneos-version-min=13.0 -framework CoreFoundation -framework Security
   LIBS:            -lz

  curl version:     8.0.1
  SSL:              enabled (Secure Transport)
  SSH:              no      (--with-{libssh,libssh2})
  zlib:             enabled
  brotli:           no      (--with-brotli)
  zstd:             no      (--with-zstd)
  GSS-API:          no      (--with-gssapi)
  GSASL:            no      (libgsasl not found)
  TLS-SRP:          no      (--enable-tls-srp)
  resolver:         POSIX threaded
  IPv6:             enabled
  Unix sockets:     enabled
  IDN:              no      (--with-{libidn2,winidn})
  Build libcurl:    Shared=no, Static=yes
  Built-in manual:  no      (--enable-manual)
  --libcurl option: enabled (--disable-libcurl-option)
  Verbose errors:   enabled (--disable-verbose)
  Code coverage:    disabled
  SSPI:             no      (--enable-sspi)
  ca cert bundle:   no
  ca cert path:     
  ca fallback:      
  LDAP:             no      (--enable-ldap / --with-ldap-lib / --with-lber-lib)
  LDAPS:            no      (--enable-ldaps)
  RTSP:             no      (--enable-rtsp)
  RTMP:             no      (--with-librtmp)
  PSL:              no      (libpsl not found)
  Alt-svc:          enabled (--disable-alt-svc)
  Headers API:      enabled (--disable-headers-api)
  HSTS:             enabled (--disable-hsts)
  HTTP1:            enabled (internal)
  HTTP2:            no      (--with-nghttp2, --with-hyper)
  HTTP3:            no      (--with-ngtcp2, --with-quiche --with-msh3)
  ECH:              no      (--enable-ech)
  WebSockets:       no      (--enable-websockets)
  Protocols:        HTTP HTTPS MQTT
  Features:         AsynchDNS HSTS HTTPS-proxy IPv6 Largefile NTLM NTLM_WB SSL UnixSockets alt-svc libz threadsafe

Compilation warnings:

md4.c:117:9: warning: 'CC_MD4_Init' is deprecated: first deprecated in iOS 13.0 - This function is cryptographically broken and should not be used in security contexts. Clients should migrate to SHA256 (or stronger). [-Wdeprecated-declarations]
  (void)CC_MD4_Init(ctx);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/usr/include/CommonCrypto/CommonDigest.h:106:12: note: 'CC_MD4_Init' has been explicitly marked deprecated here
extern int CC_MD4_Init(CC_MD4_CTX *c)
           ^
md4.c:122:9: warning: 'CC_MD4_Update' is deprecated: first deprecated in iOS 13.0 - This function is cryptographically broken and should not be used in security contexts. Clients should migrate to SHA256 (or stronger). [-Wdeprecated-declarations]
  (void)CC_MD4_Update(ctx, data, (CC_LONG)size);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/usr/include/CommonCrypto/CommonDigest.h:109:12: note: 'CC_MD4_Update' has been explicitly marked deprecated here
extern int CC_MD4_Update(CC_MD4_CTX *c, const void *data, CC_LONG len)
           ^
md4.c:127:9: warning: 'CC_MD4_Final' is deprecated: first deprecated in iOS 13.0 - This function is cryptographically broken and should not be used in security contexts. Clients should migrate to SHA256 (or stronger). [-Wdeprecated-declarations]
  (void)CC_MD4_Final(result, ctx);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/usr/include/CommonCrypto/CommonDigest.h:112:12: note: 'CC_MD4_Final' has been explicitly marked deprecated here
extern int CC_MD4_Final(unsigned char *md, CC_MD4_CTX *c)
           ^
3 warnings generated.
  CC       libcurl_la-multi.lo
  CC       libcurl_la-netrc.lo
  CC       libcurl_la-nonblock.lo
  CC       libcurl_la-noproxy.lo
  CC       libcurl_la-openldap.lo
md5.c:180:7: warning: 'CC_MD5_Init' is deprecated: first deprecated in iOS 13.0 - This function is cryptographically broken and should not be used in security contexts. Clients should migrate to SHA256 (or stronger). [-Wdeprecated-declarations]
  if(!CC_MD5_Init(ctx))
      ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/usr/include/CommonCrypto/CommonDigest.h:133:12: note: 'CC_MD5_Init' has been explicitly marked deprecated here
extern int CC_MD5_Init(CC_MD5_CTX *c)
           ^
md5.c:190:3: warning: 'CC_MD5_Update' is deprecated: first deprecated in iOS 13.0 - This function is cryptographically broken and should not be used in security contexts. Clients should migrate to SHA256 (or stronger). [-Wdeprecated-declarations]
  CC_MD5_Update(ctx, input, inputLen);
  ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/usr/include/CommonCrypto/CommonDigest.h:136:12: note: 'CC_MD5_Update' has been explicitly marked deprecated here
extern int CC_MD5_Update(CC_MD5_CTX *c, const void *data, CC_LONG len)
           ^
md5.c:195:3: warning: 'CC_MD5_Final' is deprecated: first deprecated in iOS 13.0 - This function is cryptographically broken and should not be used in security contexts. Clients should migrate to SHA256 (or stronger). [-Wdeprecated-declarations]
  CC_MD5_Final(digest, ctx);
  ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/usr/include/CommonCrypto/CommonDigest.h:139:12: note: 'CC_MD5_Final' has been explicitly marked deprecated here
extern int CC_MD5_Final(unsigned char *md, CC_MD5_CTX *c)

vtls/sectransp.c:1196:7: warning: 'CFURLCreateDataAndPropertiesFromResource' is deprecated: first deprecated in iOS 7.0 - For resource data, use the CFReadStream API. For file resource properties, use CFURLCopyResourcePropertiesForKeys. [-Wdeprecated-declarations]
      CFURLCreateDataAndPropertiesFromResource(NULL,
      ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFURLAccess.h:52:9: note: 'CFURLCreateDataAndPropertiesFromResource' has been explicitly marked deprecated here
Boolean CFURLCreateDataAndPropertiesFromResource(CFAllocatorRef alloc, CFURLRef url, CFDataRef *resourceData, CFDictionaryRef *properties, CFArrayRef desiredProperties, SInt32 *errorCode) API_DEPRECATED("For resource data, use the CFReadStream API. For file resource properties, use CFURLCopyResourcePropertiesForKeys.", macos(10.0,10.9), ios(2.0,7.0), watchos(2.0,2.0), tvos(9.0,9.0));
        ^
vtls/sectransp.c:1309:20: warning: 'kTLSProtocol1' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      *darwinver = kTLSProtocol1;
                   ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:157:5: note: 'kTLSProtocol1' has been explicitly marked deprecated here
    kTLSProtocol1 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 4,
    ^
vtls/sectransp.c:1312:20: warning: 'kTLSProtocol11' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      *darwinver = kTLSProtocol11;
                   ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:158:5: note: 'kTLSProtocol11' has been explicitly marked deprecated here
    kTLSProtocol11 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 7,
    ^
vtls/sectransp.c:1315:20: warning: 'kTLSProtocol12' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      *darwinver = kTLSProtocol12;
                   ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:159:5: note: 'kTLSProtocol12' has been explicitly marked deprecated here
    kTLSProtocol12 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 8,
    ^
vtls/sectransp.c:1321:22: warning: 'kTLSProtocol13' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
        *darwinver = kTLSProtocol13;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:161:5: note: 'kTLSProtocol13' has been explicitly marked deprecated here
    kTLSProtocol13 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 10,
    ^
vtls/sectransp.c:1374:6: warning: 'SSLSetProtocolVersionMax' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  if(SSLSetProtocolVersionMax) {
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:494:1: note: 'SSLSetProtocolVersionMax' has been explicitly marked deprecated here
SSLSetProtocolVersionMax  (SSLContextRef      context,
^
vtls/sectransp.c:1375:34: warning: 'kTLSProtocol1' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
    SSLProtocol darwin_ver_min = kTLSProtocol1;
                                 ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:157:5: note: 'kTLSProtocol1' has been explicitly marked deprecated here
    kTLSProtocol1 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 4,
    ^
vtls/sectransp.c:1376:34: warning: 'kTLSProtocol1' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
    SSLProtocol darwin_ver_max = kTLSProtocol1;
                                 ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:157:5: note: 'kTLSProtocol1' has been explicitly marked deprecated here
    kTLSProtocol1 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 4,
    ^
vtls/sectransp.c:1390:11: warning: 'SSLSetProtocolVersionMin' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    (void)SSLSetProtocolVersionMin(backend->ssl_ctx, darwin_ver_min);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:458:1: note: 'SSLSetProtocolVersionMin' has been explicitly marked deprecated here
SSLSetProtocolVersionMin  (SSLContextRef      context,
^
vtls/sectransp.c:1391:11: warning: 'SSLSetProtocolVersionMax' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    (void)SSLSetProtocolVersionMax(backend->ssl_ctx, darwin_ver_max);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:494:1: note: 'SSLSetProtocolVersionMax' has been explicitly marked deprecated here
SSLSetProtocolVersionMax  (SSLContextRef      context,
^
vtls/sectransp.c:1475:9: warning: 'SSLGetNumberSupportedCiphers' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLGetNumberSupportedCiphers(ssl_ctx, &all_ciphers_count);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:818:1: note: 'SSLGetNumberSupportedCiphers' has been explicitly marked deprecated here
SSLGetNumberSupportedCiphers (SSLContextRef                     context,
^
vtls/sectransp.c:1492:9: warning: 'SSLGetSupportedCiphers' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLGetSupportedCiphers(ssl_ctx, all_ciphers,
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:832:1: note: 'SSLGetSupportedCiphers' has been explicitly marked deprecated here
SSLGetSupportedCiphers           (SSLContextRef                 context,
^
vtls/sectransp.c:1514:9: warning: 'SSLSetEnabledCiphers' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLSetEnabledCiphers(ssl_ctx, allowed_ciphers,
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:865:1: note: 'SSLSetEnabledCiphers' has been explicitly marked deprecated here
SSLSetEnabledCiphers            (SSLContextRef                  context,
^
vtls/sectransp.c:1617:9: warning: 'SSLSetEnabledCiphers' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLSetEnabledCiphers(ssl_ctx, selected_ciphers, ciphers_count);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:865:1: note: 'SSLSetEnabledCiphers' has been explicitly marked deprecated here
SSLSetEnabledCiphers            (SSLContextRef                  context,
^
vtls/sectransp.c:1656:6: warning: 'SSLCreateContext' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  if(SSLCreateContext) {  /* use the newer API if available */
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:316:1: note: 'SSLCreateContext' has been explicitly marked deprecated here
SSLCreateContext(CFAllocatorRef __nullable alloc, SSLProtocolSide protocolSide, SSLConnectionType connectionType)
^
vtls/sectransp.c:1659:24: warning: 'SSLCreateContext' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    backend->ssl_ctx = SSLCreateContext(NULL, kSSLClientSide, kSSLStreamType);
                       ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:316:1: note: 'SSLCreateContext' has been explicitly marked deprecated here
SSLCreateContext(CFAllocatorRef __nullable alloc, SSLProtocolSide protocolSide, SSLConnectionType connectionType)
^
vtls/sectransp.c:1659:47: warning: 'kSSLClientSide' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
    backend->ssl_ctx = SSLCreateContext(NULL, kSSLClientSide, kSSLStreamType);
                                              ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:218:5: note: 'kSSLClientSide' has been explicitly marked deprecated here
    kSSLClientSide CF_ENUM_DEPRECATED(10_2, 10_15, 2_0, 13_0)
    ^
vtls/sectransp.c:1659:63: warning: 'kSSLStreamType' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
    backend->ssl_ctx = SSLCreateContext(NULL, kSSLClientSide, kSSLStreamType);
                                                              ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:223:5: note: 'kSSLStreamType' has been explicitly marked deprecated here
    kSSLStreamType CF_ENUM_DEPRECATED(10_2, 10_15, 2_0, 13_0),
    ^
vtls/sectransp.c:1690:6: warning: 'SSLSetProtocolVersionMax' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  if(SSLSetProtocolVersionMax) {
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:494:1: note: 'SSLSetProtocolVersionMax' has been explicitly marked deprecated here
SSLSetProtocolVersionMax  (SSLContextRef      context,
^
vtls/sectransp.c:1693:13: warning: 'SSLSetProtocolVersionMin' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
      (void)SSLSetProtocolVersionMin(backend->ssl_ctx, kTLSProtocol1);
            ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:458:1: note: 'SSLSetProtocolVersionMin' has been explicitly marked deprecated here
SSLSetProtocolVersionMin  (SSLContextRef      context,
^
vtls/sectransp.c:1693:56: warning: 'kTLSProtocol1' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      (void)SSLSetProtocolVersionMin(backend->ssl_ctx, kTLSProtocol1);
                                                       ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:157:5: note: 'kTLSProtocol1' has been explicitly marked deprecated here
    kTLSProtocol1 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 4,
    ^
vtls/sectransp.c:1696:15: warning: 'SSLSetProtocolVersionMax' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
        (void)SSLSetProtocolVersionMax(backend->ssl_ctx, kTLSProtocol13);
              ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:494:1: note: 'SSLSetProtocolVersionMax' has been explicitly marked deprecated here
SSLSetProtocolVersionMax  (SSLContextRef      context,
^
vtls/sectransp.c:1696:58: warning: 'kTLSProtocol13' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
        (void)SSLSetProtocolVersionMax(backend->ssl_ctx, kTLSProtocol13);
                                                         ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:161:5: note: 'kTLSProtocol13' has been explicitly marked deprecated here
    kTLSProtocol13 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 10,
    ^
vtls/sectransp.c:1699:15: warning: 'SSLSetProtocolVersionMax' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
        (void)SSLSetProtocolVersionMax(backend->ssl_ctx, kTLSProtocol12);
              ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:494:1: note: 'SSLSetProtocolVersionMax' has been explicitly marked deprecated here
SSLSetProtocolVersionMax  (SSLContextRef      context,
^
vtls/sectransp.c:1699:58: warning: 'kTLSProtocol12' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
        (void)SSLSetProtocolVersionMax(backend->ssl_ctx, kTLSProtocol12);
                                                         ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:159:5: note: 'kTLSProtocol12' has been explicitly marked deprecated here
    kTLSProtocol12 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 8,
    ^
vtls/sectransp.c:1814:13: warning: 'SSLSetALPNProtocols' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
      err = SSLSetALPNProtocols(backend->ssl_ctx, alpnArr);
            ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1332:1: note: 'SSLSetALPNProtocols' has been explicitly marked deprecated here
SSLSetALPNProtocols         (SSLContextRef      context,
^
vtls/sectransp.c:1882:13: warning: 'SSLSetCertificate' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
      err = SSLSetCertificate(backend->ssl_ctx, certs);
            ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:637:1: note: 'SSLSetCertificate' has been explicitly marked deprecated here
SSLSetCertificate                       (SSLContextRef          context,
^
vtls/sectransp.c:1945:6: warning: 'SSLSetSessionOption' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  if(SSLSetSessionOption) {
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:384:1: note: 'SSLSetSessionOption' has been explicitly marked deprecated here
SSLSetSessionOption                     (SSLContextRef          context,
^
vtls/sectransp.c:1949:11: warning: 'SSLSetSessionOption' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    err = SSLSetSessionOption(backend->ssl_ctx,
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:384:1: note: 'SSLSetSessionOption' has been explicitly marked deprecated here
SSLSetSessionOption                     (SSLContextRef          context,
^
vtls/sectransp.c:1950:31: warning: 'kSSLSessionOptionBreakOnServerAuth' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
                              kSSLSessionOptionBreakOnServerAuth,
                              ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:99:2: note: 'kSSLSessionOptionBreakOnServerAuth' has been explicitly marked deprecated here
        kSSLSessionOptionBreakOnServerAuth CF_ENUM_DEPRECATED(10_2, 10_15, 2_0, 13_0) = 0,
        ^
vtls/sectransp.c:1997:11: warning: 'SSLSetPeerDomainName' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    err = SSLSetPeerDomainName(backend->ssl_ctx, snihost, snilen);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:686:1: note: 'SSLSetPeerDomainName' has been explicitly marked deprecated here
SSLSetPeerDomainName            (SSLContextRef          context,
^
vtls/sectransp.c:2034:6: warning: 'SSLSetSessionOption' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  if(SSLSetSessionOption) {
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:384:1: note: 'SSLSetSessionOption' has been explicitly marked deprecated here
SSLSetSessionOption                     (SSLContextRef          context,
^
vtls/sectransp.c:2035:5: warning: 'SSLSetSessionOption' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    SSLSetSessionOption(backend->ssl_ctx, kSSLSessionOptionSendOneByteRecord,
    ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:384:1: note: 'SSLSetSessionOption' has been explicitly marked deprecated here
SSLSetSessionOption                     (SSLContextRef          context,
^
vtls/sectransp.c:2035:43: warning: 'kSSLSessionOptionSendOneByteRecord' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
    SSLSetSessionOption(backend->ssl_ctx, kSSLSessionOptionSendOneByteRecord,
                                          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:123:5: note: 'kSSLSessionOptionSendOneByteRecord' has been explicitly marked deprecated here
    kSSLSessionOptionSendOneByteRecord CF_ENUM_DEPRECATED(10_2, 10_15, 2_0, 13_0) = 4,
    ^
vtls/sectransp.c:2037:5: warning: 'SSLSetSessionOption' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    SSLSetSessionOption(backend->ssl_ctx, kSSLSessionOptionFalseStart,
    ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:384:1: note: 'SSLSetSessionOption' has been explicitly marked deprecated here
SSLSetSessionOption                     (SSLContextRef          context,
^
vtls/sectransp.c:2037:43: warning: 'kSSLSessionOptionFalseStart' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
    SSLSetSessionOption(backend->ssl_ctx, kSSLSessionOptionFalseStart,
                                          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:117:5: note: 'kSSLSessionOptionFalseStart' has been explicitly marked deprecated here
    kSSLSessionOptionFalseStart CF_ENUM_DEPRECATED(10_2, 10_15, 2_0, 13_0) = 3,
    ^
vtls/sectransp.c:2051:13: warning: 'SSLSetPeerID' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
      err = SSLSetPeerID(backend->ssl_ctx, ssl_sessionid, ssl_sessionid_len);
            ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1285:1: note: 'SSLSetPeerID' has been explicitly marked deprecated here
SSLSetPeerID                            (SSLContextRef          context,
^
vtls/sectransp.c:2071:13: warning: 'SSLSetPeerID' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
      err = SSLSetPeerID(backend->ssl_ctx, ssl_sessionid, ssl_sessionid_len);
            ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1285:1: note: 'SSLSetPeerID' has been explicitly marked deprecated here
SSLSetPeerID                            (SSLContextRef          context,
^
vtls/sectransp.c:2088:9: warning: 'SSLSetIOFuncs' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLSetIOFuncs(backend->ssl_ctx, bio_cf_in_read, bio_cf_out_write);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:418:1: note: 'SSLSetIOFuncs' has been explicitly marked deprecated here
SSLSetIOFuncs                           (SSLContextRef          context,
^
vtls/sectransp.c:2094:9: warning: 'SSLSetConnection' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLSetConnection(backend->ssl_ctx, cf);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:657:1: note: 'SSLSetConnection' has been explicitly marked deprecated here
SSLSetConnection                        (SSLContextRef                  context,
^
vtls/sectransp.c:2302:9: warning: 'SSLCopyPeerTrust' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  ret = SSLCopyPeerTrust(ctx, &trust);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1261:1: note: 'SSLCopyPeerTrust' has been explicitly marked deprecated here
SSLCopyPeerTrust                        (SSLContextRef          context,
^
vtls/sectransp.c:2325:9: warning: 'SecTrustEvaluate' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
  ret = SecTrustEvaluate(trust, &trust_eval);
        ^~~~~~~~~~~~~~~~
        SecTrustEvaluateWithError
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecTrust.h:359:10: note: 'SecTrustEvaluate' has been explicitly marked deprecated here
OSStatus SecTrustEvaluate(SecTrustRef trust, SecTrustResultType *result)
         ^
vtls/sectransp.c:2423:11: warning: 'SSLCopyPeerTrust' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    ret = SSLCopyPeerTrust(ctx, &trust);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1261:1: note: 'SSLCopyPeerTrust' has been explicitly marked deprecated here
SSLCopyPeerTrust                        (SSLContextRef          context,
^
vtls/sectransp.c:2525:9: warning: 'SSLHandshake' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLHandshake(backend->ssl_ctx);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1641:1: note: 'SSLHandshake' has been explicitly marked deprecated here
SSLHandshake                            (SSLContextRef          context)
^
vtls/sectransp.c:2762:11: warning: 'SSLGetNegotiatedCipher' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    (void)SSLGetNegotiatedCipher(backend->ssl_ctx, &cipher);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1314:1: note: 'SSLGetNegotiatedCipher' has been explicitly marked deprecated here
SSLGetNegotiatedCipher          (SSLContextRef          context,
^
vtls/sectransp.c:2763:11: warning: 'SSLGetNegotiatedProtocolVersion' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    (void)SSLGetNegotiatedProtocolVersion(backend->ssl_ctx, &protocol);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:803:1: note: 'SSLGetNegotiatedProtocolVersion' has been explicitly marked deprecated here
SSLGetNegotiatedProtocolVersion         (SSLContextRef          context,
^
vtls/sectransp.c:2765:12: warning: 'kSSLProtocol2' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      case kSSLProtocol2:
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:164:5: note: 'kSSLProtocol2' has been explicitly marked deprecated here
    kSSLProtocol2 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 1,
    ^
vtls/sectransp.c:2769:12: warning: 'kSSLProtocol3' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      case kSSLProtocol3:
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:165:5: note: 'kSSLProtocol3' has been explicitly marked deprecated here
    kSSLProtocol3 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 2,
    ^
vtls/sectransp.c:2773:12: warning: 'kTLSProtocol1' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      case kTLSProtocol1:
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:157:5: note: 'kTLSProtocol1' has been explicitly marked deprecated here
    kTLSProtocol1 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 4,
    ^
vtls/sectransp.c:2778:12: warning: 'kTLSProtocol11' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      case kTLSProtocol11:
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:158:5: note: 'kTLSProtocol11' has been explicitly marked deprecated here
    kTLSProtocol11 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 7,
    ^
vtls/sectransp.c:2782:12: warning: 'kTLSProtocol12' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      case kTLSProtocol12:
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:159:5: note: 'kTLSProtocol12' has been explicitly marked deprecated here
    kTLSProtocol12 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 8,
    ^
vtls/sectransp.c:2788:12: warning: 'kTLSProtocol13' is deprecated: first deprecated in iOS 13.0 [-Wdeprecated-declarations]
      case kTLSProtocol13:
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecProtocolTypes.h:161:5: note: 'kTLSProtocol13' has been explicitly marked deprecated here
    kTLSProtocol13 CF_ENUM_DEPRECATED(10_2, 10_15, 5_0, 13_0) = 10,
    ^
vtls/sectransp.c:2803:15: warning: 'SSLCopyALPNProtocols' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
        err = SSLCopyALPNProtocols(backend->ssl_ctx, &alpnArr);
              ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1354:1: note: 'SSLCopyALPNProtocols' has been explicitly marked deprecated here
SSLCopyALPNProtocols        (SSLContextRef      context,
^
vtls/sectransp.c:2910:9: warning: 'SSLCopyPeerTrust' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLCopyPeerTrust(backend->ssl_ctx, &trust);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1261:1: note: 'SSLCopyPeerTrust' has been explicitly marked deprecated here
SSLCopyPeerTrust                        (SSLContextRef          context,
^
vtls/sectransp.c:3143:11: warning: 'SSLClose' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    (void)SSLClose(backend->ssl_ctx);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1731:1: note: 'SSLClose' has been explicitly marked deprecated here
SSLClose                                        (SSLContextRef          context)
^
vtls/sectransp.c:3145:8: warning: 'SSLCreateContext' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    if(SSLCreateContext)
       ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:316:1: note: 'SSLCreateContext' has been explicitly marked deprecated here
SSLCreateContext(CFAllocatorRef __nullable alloc, SSLProtocolSide protocolSide, SSLConnectionType connectionType)
^
vtls/sectransp.c:3249:11: warning: 'SSLGetBufferedReadSize' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    err = SSLGetBufferedReadSize(backend->ssl_ctx, &buffer);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1705:1: note: 'SSLGetBufferedReadSize' has been explicitly marked deprecated here
SSLGetBufferedReadSize          (SSLContextRef context,
^
vtls/sectransp.c:3291:6: warning: 'SSLSetSessionOption' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  if(SSLSetSessionOption)
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:384:1: note: 'SSLSetSessionOption' has been explicitly marked deprecated here
SSLSetSessionOption                     (SSLContextRef          context,
^
vtls/sectransp.c:3327:11: warning: 'SSLWrite' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    err = SSLWrite(backend->ssl_ctx, NULL, 0UL, &processed);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1670:1: note: 'SSLWrite' has been explicitly marked deprecated here
SSLWrite                                        (SSLContextRef          context,
^
vtls/sectransp.c:3346:11: warning: 'SSLWrite' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
    err = SSLWrite(backend->ssl_ctx, mem, len, &processed);
          ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1670:1: note: 'SSLWrite' has been explicitly marked deprecated here
SSLWrite                                        (SSLContextRef          context,
^
vtls/sectransp.c:3381:9: warning: 'SSLRead' is deprecated: first deprecated in iOS 13.0 - No longer supported. Use Network.framework. [-Wdeprecated-declarations]
  err = SSLRead(backend->ssl_ctx, buf, buffersize, &processed);
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/Security.framework/Headers/SecureTransport.h:1689:1: note: 'SSLRead' has been explicitly marked deprecated here
SSLRead                                         (SSLContextRef          context,
^
61 warnings generated.

I expected the following

No warnings in the compilation.

curl/libcurl version

Compiling version 8.0.1 (probably happens with previous versions too)

operating system

Chip: Apple M1 Max
macOS 13.3.1 (a) (22E772610a)
Xcode: Version 14.3 (14E222b)
Darwin 22.4.0 Darwin Kernel Version 22.4.0: Mon Mar 6 20:59:28 PST 2023; root:xnu-8796.101.5~3/RELEASE_ARM64_T6000 arm64

[vszakats]

Happens with macOS builds as well. They can be silenced with the C flag -Wno-deprecated-declarations as a temporary solution.

[bagder]

temporary solution.

I'm not very fluent in macOS specifics, but "Use Network.framework." seems to imply that a rather major effort would be necessary to address these in other ways than just inhibiting the warning messages. I don't see this happening anytime soon.

[vszakats]

Indeed, it seems Apple deprecated SecureTransport as-is:
https://developer.apple.com/documentation/security/secure_transport

...I stand corrected with "temporary"!

[MarcelRaad]

For the warnings in md4.c and md5.c, we don't use the system functions anymore for recent macOS since 2998749 because of the possible warnings-as-errors. We could do the same for iOS.

Also, we can probably include MD4 support only if USE_CURL_NTLM_CORE is enabled instead of if CURL_DISABLE_CRYPTO_AUTH is disabled? That's the condition for its only usage in curl_ntlm_core.c AFAICS.

For SecureTransport, the only actionable warning seems to be this one:

vtls/sectransp.c:1196:7: warning: 'CFURLCreateDataAndPropertiesFromResource' is deprecated: first deprecated in iOS 7.0 - For resource data, use the CFReadStream API. For file resource properties, use CFURLCopyResourcePropertiesForKeys. [-Wdeprecated-declarations]
      CFURLCreateDataAndPropertiesFromResource(NULL,
      ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.4.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFURLAccess.h:52:9: note: 'CFURLCreateDataAndPropertiesFromResource' has been explicitly marked deprecated here
Boolean CFURLCreateDataAndPropertiesFromResource(CFAllocatorRef alloc, CFURLRef url, CFDataRef *resourceData, CFDictionaryRef *properties, CFArrayRef desiredProperties, SInt32 *errorCode) API_DEPRECATED("For resource data, use the CFReadStream API. For file resource properties, use CFURLCopyResourcePropertiesForKeys.", macos(10.0,10.9), ios(2.0,7.0), watchos(2.0,2.0), tvos(9.0,9.0));
        ^

If you don't want functions deprecated by Apple to be used, don't choose a framework deprecated by Apple as an SSL backend.

[vszakats]

Turns out the macOS case I mentioned is not related to SecureTransport, but to ldap (also deprecated as-is, so it's best to suppress or avoid just like SecureTransport) and sprintf:

after cmake . -DOPENSSL_ROOT_DIR=/usr/local/opt/openssl:

[ 38%] Building C object lib/CMakeFiles/libcurl.dir/ldap.c.o
./curl/lib/ldap.c:326:8: warning: 'ldap_url_parse' is deprecated: first deprecated in macOS 10.11 - use OpenDirectory Framework [-Wdeprecated-declarations]
  rc = ldap_url_parse(data->state.url, &ludp);
       ^
[...a lot of the same kind...]

[ 38%] Building C object lib/CMakeFiles/libcurl.dir/mprintf.c.o
./curl/lib/mprintf.c:975:10: warning: 'sprintf' is deprecated: This function is provided for compatibility reasons only.  Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use snprintf(3) instead. [-Wdeprecated-declarations]
        (sprintf)(work, formatbuf, p->data.dnum);
         ^
/Library/Developer/CommandLineTools/SDKs/MacOSX13.1.sdk/usr/include/stdio.h:188:1: note: 'sprintf' has been explicitly marked deprecated here
__deprecated_msg("This function is provided for compatibility reasons only.  Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use snprintf(3) instead.")
^
/Library/Developer/CommandLineTools/SDKs/MacOSX13.1.sdk/usr/include/sys/cdefs.h:215:48: note: expanded from macro '__deprecated_msg'
        #define __deprecated_msg(_msg) __attribute__((__deprecated__(_msg)))
                                                      ^
1 warning generated.

[MarcelRaad]

The md4/md5 part should be addressed by #11102.

I cannot fix the CFURLCreateDataAndPropertiesFromResource usage myself as I currently don't have an Apple development environment, so I used "Bug:" instead of "Closes" to reference this issue so that it doesn't get automatically closed.

[jnavarrom]

Thank you for checking this and for the great efforts 🙌 .

Nice to see that you addressed "This function is cryptographically broken and should not be used in security contexts" warnings 💪.

If you don't want functions deprecated by Apple to be used, don't choose a framework deprecated by Apple as an SSL backend.

I understand. I can use Secure Transport as SSL backend (or other SSL supported library: OpenSSL, GnuTLS, NSS, wolfSSL, mbedTLS, Schannel) but I can't use "Netwrok.Framework" because it is not supported as SSL backend library and it is something not planned to add in a near future.

Thanks again