build: remove Docker since it's useless and refactor CI

premake5.lua

@@ -6,9 +6,11 @@ targetdir "%{wks.location}/bin/%{cfg.platform}/%{cfg.buildcfg}"
 
 configurations {"debug", "release"}
 
-if os.istarget("darwin") then
-	platforms {"x64", "arm64"}
-else
+if os.istarget("linux") then
+	platforms {"x86", "amd64", "arm64"}
+elseif os.istarget("macosx") then
+	platforms {"amd64", "arm64"}
+else 
 	platforms {"x86", "x64", "arm64"}
 end
 
@@ -20,6 +22,10 @@ filter "platforms:x64"
 	architecture "x86_64"
 filter {}
 
+filter "platforms:amd64"
+ architecture "x86_64"
+ filter {}
+
 filter "platforms:arm64"
 	architecture "ARM64"
 filter {}
@@ -39,7 +45,25 @@ filter {"system:linux", "system:macosx"}
 	linkoptions "-pthread"
 filter {}
 
-filter {"system:macosx", "platforms:arm64"}
+if os.istarget("linux") then
+	-- this supports cross-compilation for arm64
+	filter { "toolset:clang*", "platforms:arm64" }
+		buildoptions "--target=arm64-linux-gnu"
+		linkoptions "--target=arm64-linux-gnu"
+	filter {}
+
+	filter { "toolset:clang*" }
+		-- always try to use lld. LD or Gold will not work
+		linkoptions "-fuse-ld=lld"
+	filter {}
+end
+
+filter { "system:macosx", "platforms:amd64" }
+	buildoptions "-arch x86_64"
+	linkoptions "-arch x86_64"
+filter {}
+
+filter { "system:macosx", "platforms:arm64" }
 	buildoptions "-arch arm64"
 	linkoptions "-arch arm64"
 filter {}
@@ -53,7 +77,7 @@ flags {"NoIncrementalLink", "NoMinimalRebuild", "MultiProcessorCompile", "No64Bi
 filter "configurations:release"
 	optimize "Speed"
 	defines "NDEBUG"
-	flags "FatalCompileWarnings"
+	fatalwarnings {"All"}
 filter {}
 
 filter "configurations:debug"