Fixes to pass my integration tests

_preload.lua

@@ -20,14 +20,22 @@ p.api.register {
 	kind = "string",
 }
 
+local default_toolset_map = {
+	["windows"] = "msc-v142", -- Visual Studio 2019
+	["macosx"] = "clang",
+	["linux"] = "gcc",
+	["_"] = "gcc", -- default
+}
+local default_toolset = default_toolset_map[os.target()] or default_toolset_map["_"]
+
 newaction
 {
 	-- Metadata for the command line and help system
 
 	trigger         = "cmake",
 	shortname       = "CMake",
 	description     = "Generate CMake file",
-	toolset         = "clang",
+	toolset         = default_toolset,
 
 	-- The capabilities of this action
 

cmake.lua

@@ -36,13 +36,20 @@ function cmake.generateProject(prj)
     end
 end
 
+local function normalize_identifier(name)
+    local res = string.gsub(name, "[^a-zA-Z0-9_]", "_")
+    if res ~= name then
+        premake.warnOnce("cmake_identifier_" .. name, 'configuration "' .. name .. '" contains unsuported characters, replaced by "' .. res .. '"')
+    end
+    return res
+end
+
 function cmake.cfgname(cfg)
-    local cfgname = cfg.buildcfg
     if cmake.workspace.multiplePlatforms then
-        -- CMake breaks if "|" is used here
-        cfgname = string.format("%s-%s", cfg.platform, cfg.buildcfg)
+        return string.format("%s_%s", normalize_identifier(cfg.platform), normalize_identifier(cfg.buildcfg))
+    else
+        return normalize_identifier(cfg.buildcfg)
     end
-    return cfgname
 end
 
 function cmake.cleanWorkspace(wks)