diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ed8ec56..2fe644f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,15 @@ on:
       - master
 
 jobs:
+  codegen:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: build
+        run: |
+          make codegen
+      - name: Check if the git repository is clean
+        run: $(exit $(git status --porcelain --untracked-files=no | head -255 | wc -l)) || (echo "Dirty git tree"; git diff; exit 1)
   linux:
     runs-on: ubuntu-latest
     strategy:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 103e9a3..f7a1d1e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,9 +5,6 @@ project(quickjs LANGUAGES C)
 include(CheckCCompilerFlag)
 include(GNUInstallDirs)
 
-# TODO:
-#  - Support cross-compilation
-
 set(CMAKE_C_VISIBILITY_PRESET hidden)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_C_EXTENSIONS ON)
@@ -183,19 +180,10 @@ target_link_libraries(qjsc ${qjs_libs})
 # QuickJS CLI
 #
 
-add_custom_command(
-    OUTPUT repl.c
-    COMMAND qjsc -o ./repl.c -m ${CMAKE_CURRENT_SOURCE_DIR}/repl.js
-    DEPENDS qjsc
-    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-    COMMENT "Compile repl.js to bytecode"
-    SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/repl.js
-)
-
 add_executable(qjs_exe
+    gen/repl.c
     qjs.c
     quickjs-libc.c
-    ${CMAKE_CURRENT_BINARY_DIR}/repl.c
 )
 set_target_properties(qjs_exe PROPERTIES
     OUTPUT_NAME "qjs"
@@ -236,16 +224,8 @@ add_executable(unicode_gen EXCLUDE_FROM_ALL
 )
 target_compile_definitions(unicode_gen PRIVATE ${qjs_defines})
 
-add_custom_command(
-    OUTPUT function_source.c
-    COMMAND qjsc -e -o function_source.c ${CMAKE_CURRENT_SOURCE_DIR}/tests/function_source.js
-    DEPENDS qjsc ${CMAKE_CURRENT_SOURCE_DIR}/tests/function_source.js
-    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-    COMMENT "Compile function_source.js to a C file with bytecode embedded"
-    SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/tests/function_source.js
-)
 add_executable(function_source
-    ${CMAKE_CURRENT_BINARY_DIR}/function_source.c
+    gen/function_source.c
     quickjs-libc.c
 )
 target_include_directories(function_source PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
@@ -256,32 +236,16 @@ target_link_libraries(function_source ${qjs_libs})
 #
 
 if(BUILD_EXAMPLES AND NOT WIN32)
-    add_custom_command(
-        OUTPUT hello.c
-        COMMAND qjsc -e -o hello.c ${CMAKE_CURRENT_SOURCE_DIR}/examples/hello.js
-        DEPENDS qjsc
-        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-        COMMENT "Compile hello.js to a C file with bytecode embedded"
-        SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/examples/hello.js
-    )
     add_executable(hello
-        ${CMAKE_CURRENT_BINARY_DIR}/hello.c
+        gen/hello.c
         quickjs-libc.c
     )
     target_include_directories(hello PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
     target_compile_definitions(hello PRIVATE ${qjs_defines})
     target_link_libraries(hello ${qjs_libs})
 
-    add_custom_command(
-        OUTPUT hello_module.c
-        COMMAND qjsc -e -o hello_module.c -m ${CMAKE_CURRENT_SOURCE_DIR}/examples/hello_module.js
-        DEPENDS qjsc
-        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-        COMMENT "Compile hello_module.js to a C file with bytecode embedded"
-        SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/examples/hello_module.js
-    )
     add_executable(hello_module
-        ${CMAKE_CURRENT_BINARY_DIR}/hello_module.c
+        gen/hello_module.c
         quickjs-libc.c
     )
     target_include_directories(hello_module PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
@@ -320,17 +284,9 @@ if(BUILD_EXAMPLES AND NOT WIN32)
         endif()
     endif()
 
-    add_custom_command(
-        OUTPUT test_fib.c
-        COMMAND qjsc -e -o test_fib.c -M ${CMAKE_CURRENT_SOURCE_DIR}/examples/fib.so,fib -m ${CMAKE_CURRENT_SOURCE_DIR}/examples/test_fib.js
-        DEPENDS qjsc
-        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-        COMMENT "Compile test_fib.js to a C file with bytecode embedded"
-        SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/examples/test_fib.js
-    )
     add_executable(test_fib
-        ${CMAKE_CURRENT_BINARY_DIR}/test_fib.c
         examples/fib.c
+        gen/test_fib.c
         quickjs-libc.c
     )
     target_include_directories(test_fib PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
diff --git a/Makefile b/Makefile
index 4d25cdf..26eb386 100644
--- a/Makefile
+++ b/Makefile
@@ -28,6 +28,7 @@ BUILD_DIR=build
 BUILD_TYPE?=Release
 
 QJS=$(BUILD_DIR)/qjs
+QJSC=$(BUILD_DIR)/qjsc
 RUN262=$(BUILD_DIR)/run-test262
 
 JOBS?=$(shell getconf _NPROCESSORS_ONLN)
@@ -49,12 +50,22 @@ $(BUILD_DIR):
 $(QJS): $(BUILD_DIR)
 	cmake --build $(BUILD_DIR) -j $(JOBS)
 
-install: $(QJS)
+$(QJSC): $(BUILD_DIR)
+	cmake --build $(BUILD_DIR) --target qjsc -j $(JOBS)
+
+install: $(QJS) $(QJSC)
 	cmake --build $(BUILD_DIR) --target install
 
 clean:
 	cmake --build $(BUILD_DIR) --target clean
 
+codegen: $(QJSC)
+	$(QJSC) -o gen/repl.c -m repl.js
+	$(QJSC) -e -o gen/function_source.c tests/function_source.js
+	$(QJSC) -e -o gen/hello.c examples/hello.js
+	$(QJSC) -e -o gen/hello_module.c -m examples/hello_module.js
+	$(QJSC) -e -o gen/test_fib.c -M examples/fib.so,fib -m examples/test_fib.js
+
 debug:
 	BUILD_TYPE=Debug $(MAKE)
 
@@ -92,4 +103,4 @@ unicode_gen: $(BUILD_DIR)
 libunicode-table.h: unicode_gen
 	$(BUILD_DIR)/unicode_gen unicode $@
 
-.PHONY: all debug install clean distclean stats test test262 test262-update test262-check microbench unicode_gen $(QJS)
+.PHONY: all debug install clean codegen distclean stats test test262 test262-update test262-check microbench unicode_gen $(QJS) $(QJSC)
diff --git a/gen/function_source.c b/gen/function_source.c
new file mode 100644
index 0000000..6c1b490
Binary files /dev/null and b/gen/function_source.c differ
diff --git a/gen/hello.c b/gen/hello.c
new file mode 100644
index 0000000..34376e2
Binary files /dev/null and b/gen/hello.c differ
diff --git a/gen/hello_module.c b/gen/hello_module.c
new file mode 100644
index 0000000..e4c6056
Binary files /dev/null and b/gen/hello_module.c differ
diff --git a/gen/repl.c b/gen/repl.c
new file mode 100644
index 0000000..808933e
Binary files /dev/null and b/gen/repl.c differ
diff --git a/gen/test_fib.c b/gen/test_fib.c
new file mode 100644
index 0000000..1d9d138
Binary files /dev/null and b/gen/test_fib.c differ