cmake: use list APPEND syntax for CMAKE_REQUIRED_DEFINITIONS

- Use list() instead of set() for CMAKE_REQUIRED_DEFINITIONS list since
  the former is clearer.

Closes https://github.com/curl/curl/pull/10272

diff --git a/CMake/FindGSS.cmake b/CMake/FindGSS.cmake
index 28b4de79690475184da1825ce150bcb4eaf86f85..b244e610ec611f53679b2583ec815aba58ed5dfb 100644 (file)
--- a/CMake/FindGSS.cmake
+++ b/CMake/FindGSS.cmake
@@ -181,14 +181,14 @@ if(NOT _GSS_FOUND) #not found by pkg-config. Let's take more traditional approac
         set(GSS_FLAVOUR "MIT")
       else()
         # prevent compiling the header - just check if we can include it
-        set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D__ROKEN_H__")
+        list(APPEND CMAKE_REQUIRED_DEFINITIONS -D__ROKEN_H__)
         check_include_file( "roken.h" _GSS_HAVE_ROKEN_H)
 
         check_include_file( "heimdal/roken.h" _GSS_HAVE_HEIMDAL_ROKEN_H)
         if(_GSS_HAVE_ROKEN_H OR _GSS_HAVE_HEIMDAL_ROKEN_H)
           set(GSS_FLAVOUR "Heimdal")
         endif()
-        set(CMAKE_REQUIRED_DEFINITIONS "")
+        list(REMOVE_ITEM CMAKE_REQUIRED_DEFINITIONS -D__ROKEN_H__)
       endif()
     else()
       # I'm not convinced if this is the right way but this is what autotools do at the moment

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a038ad0ae4c0c66c53c02bd64c6332aed04d59b4..ffb362f9b9ae9af359fb048f5c9526be7a7ec221 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -107,7 +107,7 @@ if(WIN32)
   set(CURL_TARGET_WINDOWS_VERSION "" CACHE STRING "Minimum target Windows version as hex string")
   if(CURL_TARGET_WINDOWS_VERSION)
     add_definitions(-D_WIN32_WINNT=${CURL_TARGET_WINDOWS_VERSION})
-    set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D_WIN32_WINNT=${CURL_TARGET_WINDOWS_VERSION}")
+    list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_WIN32_WINNT=${CURL_TARGET_WINDOWS_VERSION})
     set(CURL_TEST_DEFINES "${CURL_TEST_DEFINES} -D_WIN32_WINNT=${CURL_TARGET_WINDOWS_VERSION}")
   endif()
   if(ENABLE_UNICODE)
@@ -333,7 +333,7 @@ include(CheckCSourceCompiles)
 
 # On windows preload settings
 if(WIN32)
-  set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D_WINSOCKAPI_=")
+  list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_WINSOCKAPI_=)
   include(${CMAKE_CURRENT_SOURCE_DIR}/CMake/Platforms/WindowsCache.cmake)
 endif()
 
@@ -402,7 +402,7 @@ if(CURL_USE_SCHANNEL)
 endif()
 if(CURL_WINDOWS_SSPI)
   set(USE_WINDOWS_SSPI ON)
-  set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -DSECURITY_WIN32")
+  list(APPEND CMAKE_REQUIRED_DEFINITIONS -DSECURITY_WIN32)
 endif()
 
 if(CURL_USE_SECTRANSP)
@@ -645,7 +645,7 @@ if(NOT CURL_DISABLE_LDAP)
           return 0;
         }"
       )
-      set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -DLDAP_DEPRECATED=1")
+      list(APPEND CMAKE_REQUIRED_DEFINITIONS -DLDAP_DEPRECATED=1)
       list(APPEND CMAKE_REQUIRED_LIBRARIES ${CMAKE_LDAP_LIB})
       if(HAVE_LIBLBER)
         list(APPEND CMAKE_REQUIRED_LIBRARIES ${CMAKE_LBER_LIB})