add build settings for conan

Author: waruqi

xmake/modules/package/manager/conan/configurations.lua

@@ -25,7 +25,9 @@ function main()
         build          = {description = "Use it to choose if you want to build from sources.", default = "missing", values = {"all", "never", "missing", "outdated"}},
         remote         = {description = "Set the conan remote server."},
         options        = {description = "Set the options values, e.g. shared=True"},
-        settings       = {description = "Set the build settings for conan."},
+        settings       = {description = "Set the host settings for conan."},
+        settings_host  = {description = "Set the host settings for conan."},
+        settings_build = {description = "Set the build settings for conan."},
         imports        = {description = "Set the imports for conan 1.x, it has been deprecated in conan 2.x."},
         build_requires = {description = "Set the build requires for conan."}
     }

xmake/modules/package/manager/conan/v2/install_package.lua

@@ -321,12 +321,18 @@ function main(conan, name, opt)
         end
     end
 
-    -- set custom settings
-    for _, setting in ipairs(configs.settings) do
+    -- set custom host settings
+    for _, setting in ipairs(configs.settings or configs.settings_host) do
         table.insert(argv, "-s")
         table.insert(argv, setting)
     end
 
+    -- set custom build settings
+    for _, setting in ipairs(configs.settings_build) do
+        table.insert(argv, "-s:b")
+        table.insert(argv, setting)
+    end
+
     -- set remote
     if configs.remote then
         table.insert(argv, "-r")