4 files changed, 41 insertions, 0 deletions
diff --git a/tests/projects/other/autogen_code/.gitignore b/tests/projects/other/autogen_code/.gitignore
new file mode 100644
index 000000000..152105761
--- /dev/null
+++ b/tests/projects/other/autogen_code/.gitignore
@@ -0,0 +1,8 @@
+# Xmake cache
+.xmake/
+build/
+
+# MacOS Cache
+.DS_Store
+
+
diff --git a/tests/projects/other/autogen_code/test.lua b/tests/projects/other/autogen_code/test.lua
new file mode 100644
index 000000000..b57362078
--- /dev/null
+++ b/tests/projects/other/autogen_code/test.lua
@@ -0,0 +1,3 @@
+function main(t)
+    t:build()
+end
diff --git a/tests/projects/other/autogen_code/xmake.lua b/tests/projects/other/autogen_code/xmake.lua
new file mode 100644
index 000000000..fb40d8e9c
--- /dev/null
+++ b/tests/projects/other/autogen_code/xmake.lua
@@ -0,0 +1,20 @@
+add_rules("mode.debug", "mode.release")
+
+target("autogen_code")
+    set_kind("binary")
+    add_files("$(buildir)/autogen.cpp", {always_added = true})
+    before_build(function (target)
+        io.writefile("$(buildir)/autogen.cpp", [[
+#include <iostream>
+
+using namespace std;
+
+int main(int argc, char** argv)
+{
+    cout << "hello world!" << endl;
+    return 0;
+}
+        ]])
+    end)
+
+
diff --git a/xmake/core/project/target.lua b/xmake/core/project/target.lua
index 30d1ad7b1..06fab0934 100644
--- a/xmake/core/project/target.lua
+++ b/xmake/core/project/target.lua
@@ -1232,6 +1232,16 @@ function _instance:sourcefiles()
                         results = os.dirs(file)
                     end
                 end
+
+                -- Even if the current source file does not exist yet, we always add it.
+                -- This is usually used for some rules that automatically generate code files,
+                -- because they ensure that the code files have been generated before compilation.
+                --
+                -- e.g. add_files("src/test.c", {always_added = true})
+                --
+                if #results == 0 and self:extraconf("files", file, "always_added") then
+                    results = {file}
+                end
             end
             targetcache:set2("sourcefiles", file, results)
         end