Split multi-token build.flags entries when generating ESP-IDF component CMakeLists (#17649)

tests/unit_tests/test_espidf_component.py

@@ -193,6 +193,47 @@ target_link_libraries(${{COMPONENT_LIB}} INTERFACE
     )
 
 
+def test_generate_cmakelists_txt_multi_token_flag(tmp_component):
+    # PlatformIO shell-lexes each build.flags entry, so a single entry can
+    # carry a flag and its argument. The generated CMakeLists must emit them
+    # as separate compile options, not one argument with an embedded space.
+    src_dir = tmp_component.path / "src"
+    src_dir.mkdir()
+    (src_dir / "main.c").write_text("int main() {}")
+
+    tmp_component.data = {"build": {"flags": ["-include cp_custom_alloc.h", "-DTEST"]}}
+
+    content = generate_cmakelists_txt(tmp_component)
+    assert '"-include cp_custom_alloc.h"' not in content
+    assert '  "-include"\n  "cp_custom_alloc.h"\n' in content
+
+
+def test_generate_cmakelists_txt_space_separated_classified_flags(tmp_component):
+    # Space-separated -I/-L/-l entries routed to INCLUDE_DIRS and the link
+    # handling before the shlex split was added; splitting must not leak
+    # them into raw compile options.
+    src_dir = tmp_component.path / "src"
+    src_dir.mkdir()
+    (src_dir / "main.c").write_text("int main() {}")
+    (tmp_component.path / "extra_inc").mkdir()
+
+    tmp_component.data = {
+        "build": {"flags": ["-I extra_inc", "-L extra_lib", "-l extralib", "-DTEST"]}
+    }
+
+    content = generate_cmakelists_txt(tmp_component)
+    assert 'INCLUDE_DIRS "src" "extra_inc"' in content
+    assert 'target_link_directories(${COMPONENT_LIB} INTERFACE\n  "extra_lib"\n)' in (
+        content
+    )
+    assert 'target_link_libraries(${COMPONENT_LIB} INTERFACE\n  "extralib"\n)' in (
+        content
+    )
+    assert '"-I"' not in content
+    assert '"-L"' not in content
+    assert '"-l"' not in content
+
+
 def test_generate_cmakelists_txt_references_project_managed_components_variable(
     tmp_component: IDFComponent,
 ) -> None: