configure: add --with-amissl

AmiSSL is an Amiga native library which provides a wrapper over OpenSSL.
It also requires all programs using it to use bsdsocket.library
directly, rather than accessing socket functions through clib, which
libcurl was not necessarily doing previously. Configure will now check
for the headers and ensure they are included if found.

Closes #3677

1 files changed, 56 insertions, 3 deletions

diff --git a/configure.ac b/configure.ac
index 3707a886e..6d5ec2c0f 100755
--- a/configure.ac
+++ b/configure.ac
@@ -155,7 +155,7 @@ AC_SUBST(PKGADD_VENDOR)
 
 dnl
 dnl initialize all the info variables
-    curl_ssl_msg="no      (--with-{ssl,gnutls,nss,polarssl,mbedtls,cyassl,schannel,secure-transport,mesalink} )"
+    curl_ssl_msg="no      (--with-{ssl,gnutls,nss,polarssl,mbedtls,cyassl,schannel,secure-transport,mesalink,amissl} )"
     curl_ssh_msg="no      (--with-libssh2)"
    curl_zlib_msg="no      (--with-zlib)"
  curl_brotli_msg="no      (--with-brotli)"
@@ -365,6 +365,7 @@ CURL_CHECK_WIN32_LARGEFILE
 CURL_MAC_CFLAGS
 CURL_SUPPORTS_BUILTIN_AVAILABLE
 
+
 dnl ************************************************************
 dnl switch off particular protocols
 dnl
@@ -839,6 +840,28 @@ fi
 
 if test "$HAVE_GETHOSTBYNAME" != "1"
 then
+  dnl This is for AmigaOS with bsdsocket.library - needs testing before -lnet
+  AC_MSG_CHECKING([for gethostbyname for AmigaOS bsdsocket.library])
+  AC_LINK_IFELSE([
+    AC_LANG_PROGRAM([[
+#include <proto/bsdsocket.h>
+struct Library *SocketBase = NULL;
+    ]],[[
+      gethostbyname("www.dummysite.com");
+    ]])
+  ],[
+    AC_MSG_RESULT([yes])
+    HAVE_GETHOSTBYNAME="1"
+    HAVE_PROTO_BSDSOCKET_H="1"
+    AC_DEFINE(HAVE_PROTO_BSDSOCKET_H, 1, [if Amiga bsdsocket.library is in use])
+    AC_SUBST(HAVE_PROTO_BSDSOCKET_H, [1])
+  ],[
+    AC_MSG_RESULT([no])
+  ])
+fi
+
+if test "$HAVE_GETHOSTBYNAME" != "1"
+then
   dnl gethostbyname in the network lib - for Haiku OS
   AC_CHECK_LIB(network, gethostbyname,
                [HAVE_GETHOSTBYNAME="1"
@@ -1539,6 +1562,35 @@ else
   AC_MSG_RESULT(no)
 fi
 
+OPT_AMISSL=no
+AC_ARG_WITH(amissl,dnl
+AC_HELP_STRING([--with-amissl],[enable Amiga native SSL/TLS (AmiSSL)])
+AC_HELP_STRING([--without-amissl], [disable Amiga native SSL/TLS (AmiSSL)]),
+  OPT_AMISSL=$withval)
+
+AC_MSG_CHECKING([whether to enable Amiga native SSL/TLS (AmiSSL)])
+if test "$HAVE_PROTO_BSDSOCKET_H" == "1"; then
+  if test -z "$ssl_backends" -o "x$OPT_AMISSL" != xno; then
+    ssl_msg=
+    if test "x$OPT_AMISSL" != "xno"; then
+      AC_MSG_RESULT(yes)
+      ssl_msg="AmiSSL"
+      test amissl != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
+      AMISSL_ENABLED=1
+      LIBS="-lamisslauto $LIBS"
+      AC_DEFINE(USE_AMISSL, 1, [if AmiSSL is in use])
+      AC_DEFINE(USE_OPENSSL, 1, [if OpenSSL is in use])
+    else
+      AC_MSG_RESULT(no)
+    fi
+    test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
+  else
+    AC_MSG_RESULT(no)
+  fi
+else
+  AC_MSG_RESULT(no)
+fi
+
 dnl **********************************************************************
 dnl Check for the presence of SSL libraries and headers
 dnl **********************************************************************
@@ -2638,10 +2690,10 @@ if test -z "$ssl_backends" -o "x$OPT_NSS" != xno; then
   test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
 fi
 
-case "x$OPENSSL_ENABLED$GNUTLS_ENABLED$NSS_ENABLED$POLARSSL_ENABLED$MBEDTLS_ENABLED$CYASSL_ENABLED$WINSSL_ENABLED$SECURETRANSPORT_ENABLED$MESALINK_ENABLED" in
+case "x$OPENSSL_ENABLED$GNUTLS_ENABLED$NSS_ENABLED$POLARSSL_ENABLED$MBEDTLS_ENABLED$CYASSL_ENABLED$WINSSL_ENABLED$SECURETRANSPORT_ENABLED$MESALINK_ENABLED$AMISSL_ENABLED" in
 x)
   AC_MSG_WARN([SSL disabled, you will not be able to use HTTPS, FTPS, NTLM and more.])
-  AC_MSG_WARN([Use --with-ssl, --with-gnutls, --with-polarssl, --with-cyassl, --with-nss, --with-schannel, --with-secure-transport, or --with-mesalink to address this.])
+  AC_MSG_WARN([Use --with-ssl, --with-gnutls, --with-polarssl, --with-cyassl, --with-nss, --with-schannel, --with-secure-transport, --with-mesalink or --with-amissl to address this.])
   ;;
 x1)
   # one SSL backend is enabled
@@ -3522,6 +3574,7 @@ dnl default includes
 ]
 )
 
+
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 CURL_CHECK_VARIADIC_MACROS