Fix CI/CD build errors for Linux and macOS

- Fix Linux build: conditionally compile platform-specific plthook files
  - Linux now only compiles plthook_elf.c
  - macOS now only compiles plthook_osx.c
- Fix macOS build: ensure .doorstop_version files are created for all targets
  - Add after_build to doorstop_x86_64 target
  - Enhanced doorstop_arm64 after_build to create version files and properly handle universal binary creation
- Ensures compatibility with GitHub Actions workflow expectations

Author: allquixotic

xmake.lua

@@ -29,7 +29,12 @@ target("doorstop")
 
     if is_os("linux") or is_os("macosx") then
         add_files("src/nix/*.c")
-        add_files("src/nix/plthook/*.c")
+        -- Add platform-specific plthook files
+        if is_os("linux") then
+            add_files("src/nix/plthook/plthook_elf.c")
+        elseif is_os("macosx") then
+            add_files("src/nix/plthook/plthook_osx.c")
+        end
         add_links("dl")
         if is_mode("debug") then
             set_symbols("debug")
@@ -83,12 +88,17 @@ target("doorstop")
             add_files("src/util/*.c")
             add_files("src/runtimes/*.c")
             add_files("src/nix/*.c")
-            add_files("src/nix/plthook/*.c")
+            add_files("src/nix/plthook/plthook_osx.c")  -- macOS-specific
             add_links("dl")
             if is_mode("debug") then
                 set_symbols("debug")
                 set_optimize("none")
             end
+            
+            after_build(function(target)
+                io.writefile(path.join(target:targetdir(), ".doorstop_version"),
+                    info.version.major.."."..info.version.minor.."."..info.version.patch..info.version.release)
+            end)
 
         -- Build arm64 binary
         target("doorstop_arm64")
@@ -101,19 +111,37 @@ target("doorstop")
             add_files("src/util/*.c")
             add_files("src/runtimes/*.c")
             add_files("src/nix/*.c")
-            add_files("src/nix/plthook/*.c")
+            add_files("src/nix/plthook/plthook_osx.c")  -- macOS-specific
             add_links("dl")
             if is_mode("debug") then
                 set_symbols("debug")
                 set_optimize("none")
             end
 
-        -- Combine the binaries into a Universal Binary
-        after_build(function (target)
-            os.execv("sleep", {"5"}) -- Give time for both builds to finish (workaround)
-            local build_mode = is_mode("debug") and "debug" or "release"
-            local targetdir = target:targetdir()
-            os.mkdir(path.join(targetdir, "..", "..", "universal", build_mode))
-            os.execv("lipo", {"-create", "-output", path.join(targetdir, "..", "..", "universal", build_mode, "libdoorstop.dylib"), path.join(targetdir, "..", "..", "x86_64", build_mode, "libdoorstop_x86_64.dylib"), path.join(targetdir, "libdoorstop_arm64.dylib")})
-        end)
+            
+            after_build(function(target)
+                local build_mode = is_mode("debug") and "debug" or "release"
+                local targetdir = target:targetdir()
+                
+                -- Write version file for this target
+                io.writefile(path.join(targetdir, ".doorstop_version"),
+                    info.version.major.."."..info.version.minor.."."..info.version.patch..info.version.release)
+                
+                -- Give time for both builds to finish (workaround)
+                os.execv("sleep", {"5"})
+                
+                -- Create universal binary directory
+                local universal_dir = path.join(targetdir, "..", "..", "universal", build_mode)
+                os.mkdir(universal_dir)
+                
+                -- Combine the binaries into a Universal Binary
+                os.execv("lipo", {"-create", "-output", 
+                    path.join(universal_dir, "libdoorstop.dylib"), 
+                    path.join(targetdir, "..", "..", "x86_64", build_mode, "libdoorstop_x86_64.dylib"), 
+                    path.join(targetdir, "libdoorstop_arm64.dylib")})
+                
+                -- Copy version file to universal directory
+                os.cp(path.join(targetdir, ".doorstop_version"), 
+                      path.join(universal_dir, ".doorstop_version"))
+            end)
     end