From cd3edb08271a32a9c705f3c6e3364c1bdc8ac19f Mon Sep 17 00:00:00 2001
From: Simon Warta <simon@kullo.net>
Date: Fri, 5 Apr 2019 16:57:03 +0200
Subject: [PATCH] cmake: set SSL_BACKENDS

This groups all SSL backends into the feature "SSL" and sets the
SSL_BACKENDS analogue to configure.ac

Closes https://github.com/curl/curl/pull/3736
---
 CMakeLists.txt | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6f513c2bc..783b619ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1179,10 +1179,7 @@ endfunction()
 
 # Clear list and try to detect available features
 set(_items)
-_add_if("WinSSL"        SSL_ENABLED AND USE_WINDOWS_SSPI)
-_add_if("OpenSSL"       SSL_ENABLED AND USE_OPENSSL)
-_add_if("DarwinSSL"     SSL_ENABLED AND USE_DARWINSSL)
-_add_if("mbedTLS"       SSL_ENABLED AND USE_MBEDTLS)
+_add_if("SSL"           SSL_ENABLED)
 _add_if("IPv6"          ENABLE_IPV6)
 _add_if("unix-sockets"  USE_UNIX_SOCKETS)
 _add_if("libz"          HAVE_LIBZ)
@@ -1245,6 +1242,18 @@ endif()
 string(REPLACE ";" " " SUPPORT_PROTOCOLS "${_items}")
 message(STATUS "Enabled protocols: ${SUPPORT_PROTOCOLS}")
 
+# Clear list and collect SSL backends
+set(_items)
+_add_if("WinSSL"        SSL_ENABLED AND USE_WINDOWS_SSPI)
+_add_if("OpenSSL"       SSL_ENABLED AND USE_OPENSSL)
+_add_if("DarwinSSL"     SSL_ENABLED AND USE_DARWINSSL)
+_add_if("mbedTLS"       SSL_ENABLED AND USE_MBEDTLS)
+if(_items)
+  list(SORT _items)
+endif()
+string(REPLACE ";" " " SSL_BACKENDS "${_items}")
+message(STATUS "Enabled SSL backends: ${SSL_BACKENDS}")
+
 # curl-config needs the following options to be set.
 set(CC                      "${CMAKE_C_COMPILER}")
 # TODO probably put a -D... options here?