curl: Set build options the way we need for CMake

Utilities/cmcurl/CMakeLists.txt

@@ -3,10 +3,17 @@ set(BUILD_CURL_EXE OFF CACHE INTERNAL "No curl exe")
 set(BUILD_DASHBOARD_REPORTS OFF CACHE INTERNAL "No curl dashboard reports")
 set(BUILD_RELEASE_DEBUG_DIRS OFF CACHE INTERNAL "No curl release/debug dirs")
 set(BUILD_SHARED_LIBS OFF CACHE INTERNAL "Build shared libraries")
-set(CMAKE_USE_GSSAPI OFF CACHE INTERNAL "Disable curl gssapi")
-set(CMAKE_USE_LIBSSH2 OFF CACHE INTERNAL "Disable curl libssh2")
-set(CMAKE_USE_LIBSSH OFF)
-set(CMAKE_USE_OPENLDAP OFF CACHE INTERNAL "No curl OpenLDAP")
+set(CURL_USE_BEARSSL OFF)
+set(CURL_USE_GSSAPI OFF)
+set(CURL_USE_LIBSSH2 OFF)
+set(CURL_USE_LIBSSH OFF)
+set(CURL_USE_MBEDTLS OFF)
+set(CURL_USE_NSS OFF)
+set(CURL_USE_OPENLDAP OFF)
+set(CURL_USE_OPENSSL "${CMAKE_USE_OPENSSL}")
+set(CURL_USE_SCHANNEL OFF)
+set(CURL_USE_SECTRANSP OFF)
+set(CURL_USE_WOLFSSL OFF)
 set(CURL_BROTLI OFF)
 set(CURL_DISABLE_ALTSVC ON)
 set(CURL_DISABLE_COOKIES OFF CACHE INTERNAL "Do not disable curl cookie support")
@@ -66,11 +73,10 @@ set(USE_NGTCP2 OFF)
 set(USE_QUICHE OFF)
 set(USE_WIN32_IDN OFF)
 set(USE_WIN32_LDAP OFF CACHE INTERNAL "No curl Windows LDAP")
-if(CMAKE_USE_OPENSSL)
+if(CURL_USE_OPENSSL)
 elseif(WIN32)
-  unset(CMAKE_USE_WINSSL CACHE)
-  set(CMAKE_USE_SCHANNEL ON)
-  set(CURL_WINDOWS_SSPI ON CACHE INTERNAL "Use windows libraries to allow NTLM authentication without openssl")
+  set(CURL_USE_SCHANNEL ON)
+  set(CURL_WINDOWS_SSPI ON)
 elseif(APPLE)
   # Use OS X SSL/TLS native implementation if available on target version.
   if(CMAKE_OSX_DEPLOYMENT_TARGET)
@@ -84,16 +90,11 @@ elseif(APPLE)
   endif()
   if(NOT OSX_VERSION VERSION_LESS 10.6 AND
       CMAKE_C_COMPILER_ID MATCHES "GNU|LCC|Clang|AppleClang")
-    set(CMAKE_USE_SECTRANSP ON CACHE INTERNAL "enable Apple OS native SSL/TLS")
+    set(CURL_USE_SECTRANSP ON)
   else()
-    set(CMAKE_USE_SECTRANSP OFF CACHE INTERNAL "enable Apple OS native SSL/TLS")
+    set(CURL_USE_SECTRANSP OFF)
   endif()
-  unset(CMAKE_USE_DARWINSSL CACHE)
 endif()
-set(CMAKE_USE_MBEDTLS OFF CACHE INTERNAL "Enable mbedTLS for SSL/TLS")
-set(CMAKE_USE_BEARSSL OFF CACHE INTERNAL "Enable BearSSL for SSL/TLS")
-set(CMAKE_USE_NSS OFF CACHE INTERNAL "Enable NSS for SSL/TLS")
-set(CMAKE_USE_WOLFSSL OFF)
 
 # Windows Vista and above have inet_pton, but this will link on
 # older versions and then the executable will fail to launch at
@@ -490,6 +491,7 @@ if(WIN32)
   check_library_exists_concat("winmm"  getch        HAVE_LIBWINMM)
 endif()
 
+if(0) # This code not needed for building within CMake.
 # This check below for use of deprecated symbols is only temporary and is to
 # be removed again after a year's service. Remove after November 25, 2022.
 set(CURL_RECONFIG_REQUIRED 0)
@@ -531,6 +533,7 @@ if(WIN32 OR CURL_USE_SECTRANSP OR CURL_USE_SCHANNEL OR CURL_USE_MBEDTLS OR CURL_
 endif()
 cmake_dependent_option(CURL_USE_OPENSSL "Use OpenSSL code. Experimental" ${openssl_default} CURL_ENABLE_SSL OFF)
 option(CURL_DISABLE_OPENSSL_AUTO_LOAD_CONFIG "Disable automatic loading of OpenSSL configuration" OFF)
+endif()
 
 count_true(enabled_ssl_options_count
   CURL_USE_SCHANNEL

Utilities/cmcurl/lib/CMakeLists.txt

@@ -82,7 +82,7 @@ endif()
 # For windows we want to install OPENSSL_LIBRARIES dlls
 # and also copy them into the build tree so that testing
 # can find them.
-if(CMAKE_USE_OPENSSL AND OPENSSL_FOUND AND WIN32)
+if(CURL_USE_OPENSSL AND OPENSSL_FOUND AND WIN32)
   find_file(CMAKE_EAY_DLL NAME libeay32.dll HINTS ${OPENSSL_INCLUDE_DIR}/..)
   find_file(CMAKE_SSL_DLL NAME ssleay32.dll HINTS ${OPENSSL_INCLUDE_DIR}/..)
   mark_as_advanced(CMAKE_EAY_DLL CMAKE_SSL_DLL)