Add --arch to Premake build options

.github/workflows/ci-workflow.yml

@@ -13,7 +13,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v2
     - name: Build
-      run: make -f Bootstrap.mak linux CONFIG=${{ matrix.config }}
+      run: make -f Bootstrap.mak linux PLATFORM=${{ matrix.platform }} CONFIG=${{ matrix.config }}
     - name: Test
       run: bin/${{ matrix.config }}/premake5 test --test-all
     - name: Upload Artifacts
@@ -32,7 +32,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v2
     - name: Build
-      run: make -f Bootstrap.mak macosx CONFIG=${{ matrix.config }}
+      run: make -f Bootstrap.mak macosx PLATFORM=${{ matrix.platform }} CONFIG=${{ matrix.config }}
     - name: Test
       run: bin/${{ matrix.config }}/premake5 test --test-all
     - name: Upload Artifacts

Bootstrap.mak

@@ -87,7 +87,7 @@ mingw: mingw-clean
 	if not exist build\bootstrap (mkdir build\bootstrap)
 	$(CC) -o build/bootstrap/premake_bootstrap -DPREMAKE_NO_BUILTIN_SCRIPTS -I"$(LUA_DIR)" -I"$(LUASHIM_DIR)" $(SRC) -lole32 -lversion
 	./build/bootstrap/premake_bootstrap embed
-	./build/bootstrap/premake_bootstrap --os=windows --to=build/bootstrap --cc=mingw gmake2
+	./build/bootstrap/premake_bootstrap --arch=$(PLATFORM) --os=windows --to=build/bootstrap --cc=mingw gmake2
 	$(MAKE) -C build/bootstrap config=$(CONFIG)_$(PLATFORM)
 
 macosx: osx
@@ -100,7 +100,7 @@ osx: osx-clean
 	mkdir -p build/bootstrap
 	$(CC) -o build/bootstrap/premake_bootstrap -DPREMAKE_NO_BUILTIN_SCRIPTS -DLUA_USE_MACOSX -I"$(LUA_DIR)" -I"$(LUASHIM_DIR)" -framework CoreServices -framework Foundation -framework Security -lreadline $(SRC)
 	./build/bootstrap/premake_bootstrap embed
-	./build/bootstrap/premake_bootstrap --to=build/bootstrap gmake2
+	./build/bootstrap/premake_bootstrap --arch=$(PLATFORM) --to=build/bootstrap gmake2
 	$(MAKE) -C build/bootstrap -j`getconf _NPROCESSORS_ONLN` config=$(CONFIG)
 
 linux-clean: nix-clean
@@ -143,7 +143,7 @@ windows-base: windows-clean
 	if not exist build\bootstrap (mkdir build\bootstrap)
 	cl /Fo.\build\bootstrap\ /Fe.\build\bootstrap\premake_bootstrap.exe /DPREMAKE_NO_BUILTIN_SCRIPTS /I"$(LUA_DIR)" /I"$(LUASHIM_DIR)" user32.lib ole32.lib advapi32.lib $(SRC)
 	.\build\bootstrap\premake_bootstrap.exe embed
-	.\build\bootstrap\premake_bootstrap --to=build/bootstrap $(MSDEV)
+	.\build\bootstrap\premake_bootstrap --arch=$(PLATFORM) --to=build/bootstrap $(MSDEV)
 
 windows: windows-base
 	devenv .\build\bootstrap\Premake5.sln /Upgrade

premake5.lua

@@ -90,6 +90,23 @@
 		description = "Embed scripts as bytecode instead of stripped souce code"
 	}
 
+	newoption {
+		trigger = "arch",
+		value = "arch",
+		description = "Set the architecture of the binary to be built.",
+		allowed = {
+			{ "ARM", "ARM (On macOS, same as ARM64.)" },
+			{ "ARM64", "ARM64" },
+			{ "x86", "x86 (On macOS, same as x86_64.)" },
+			{ "x86_64", "x86_64" },
+			{ "Universal", "Universal Binary (macOS only)" },
+			--
+			{ "Win32", "Same as x86" },
+			{ "x64", "Same as x86_64" },
+		},
+		default = "x86",
+	}
+
 --
 -- Define the project. Put the release configuration first so it will be the
 -- default when folks build using the makefile. That way they don't have to
@@ -116,8 +133,29 @@
 			defines { "CURL_STATICLIB", "PREMAKE_CURL"}
 		end
 
-		filter { 'system:windows' }
+		filter { "system:macosx", "options:arch=ARM or arch=ARM64" }
-			platforms   { 'x86', 'x64' }
+			buildoptions { "-arch arm64" }
+			linkoptions { "-arch arm64" }
+
+		filter { "system:macosx", "options:arch=x86 or arch=x86_64 or arch=Win32 or arch=x64" }
+			buildoptions { "-arch x86_64" }
+			linkoptions { "-arch x86_64" }
+
+		filter { "system:macosx", "options:arch=Universal" }
+			buildoptions { "-arch arm64", "-arch x86_64" }
+			linkoptions { "-arch arm64", "-arch x86_64" }
+
+		filter { "system:windows", "options:arch=ARM" }
+			platforms { "ARM" }
+
+		filter { "system:windows", "options:arch=ARM64" }
+			platforms { "ARM64" }
+
+		filter { "system:windows", "options:arch=x86 or arch=Win32" }
+			platforms { "Win32" }
+
+		filter { "system:windows", "options:arch=x86_64 or arch=x64" }
+			platforms { "x64" }
 
 		filter "configurations:Debug"
 			defines     "_DEBUG"