Make .pxi files static; remove cmake_generate_pxi.py

UNAME_SYSNAME and PY_MAJOR_VERSION are Cython built-in compile-time
constants — no DEF needed. INT_MIN/INT_MAX now come from libc.limits
via a direct cimport. The two platform_cimports.pxi files use Cython's
own IF/ELIF/ELSE on UNAME_SYSNAME instead of being generated per-OS.

Removes cmake_generate_pxi.py and its CMakeLists.txt custom command
entirely — no generation step, no gitignore entries, no cmake target.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: linesight

CMakeLists.txt

@@ -65,25 +65,6 @@ message(STATUS "CEF_ROOT: ${CEF_ROOT}")
 set(SRC_DIR "${CMAKE_SOURCE_DIR}/src")
 set(PYX_STAGE_DIR "${CMAKE_CURRENT_BINARY_DIR}/pyx_stage")
 
-# ---- Generate .pxi files ----------------------------------------------------
-# These write into the source tree (matching the legacy behaviour so that IDE
-# tooling keeps working).
-set(PXI_OUTPUTS
-    "${SRC_DIR}/compile_time_constants.pxi"
-    "${SRC_DIR}/platform_cimports.pxi"
-    "${SRC_DIR}/extern/cef/platform_cimports.pxi"
-)
-add_custom_command(
-    OUTPUT ${PXI_OUTPUTS}
-    COMMAND "${Python_EXECUTABLE}"
-            "${CMAKE_SOURCE_DIR}/tools/cmake_generate_pxi.py"
-            "${SRC_DIR}"
-    DEPENDS "${CMAKE_SOURCE_DIR}/tools/cmake_generate_pxi.py"
-    COMMENT "Generating Cython .pxi files"
-    VERBATIM
-)
-add_custom_target(cefpython_pxi DEPENDS ${PXI_OUTPUTS})
-
 # ---- Prepare .pyx files -----------------------------------------------------
 # Copies src/*.pyx + src/handlers/*.pyx to PYX_STAGE_DIR, flattening the
 # include paths and injecting version variables into the main file.
@@ -111,7 +92,6 @@ add_custom_command(
             --cef-version-header "${_cef_ver_header}"
     DEPENDS
         ${_pyx_src_files}
-        ${PXI_OUTPUTS}
         "${CMAKE_SOURCE_DIR}/tools/cmake_prepare_pyx.py"
     COMMENT "Preparing .pyx files -> ${PYX_STAGE_DIR}"
     VERBATIM

src/compile_time_constants.pxi

@@ -1,10 +1,3 @@
-# This file was generated by setup.py
-
-# Type this command to ignore changes to this file:
-#   git update-index --assume-unchanged src/compile_time_constants.pxi
-
-DEF UNAME_SYSNAME = "Windows"
-DEF PY_MAJOR_VERSION = 3
-cdef extern from "limits.h":
-    cdef int INT_MIN
-    cdef int INT_MAX
+# UNAME_SYSNAME and PY_MAJOR_VERSION are Cython built-in compile-time
+# constants; no DEF needed. INT_MIN/INT_MAX come from libc.limits.
+from libc.limits cimport INT_MIN, INT_MAX

src/extern/cef/platform_cimports.pxi

@@ -1,4 +1,6 @@
-# Generated by cmake_generate_pxi.py - do not edit
-# git update-index --assume-unchanged src/extern/cef/platform_cimports.pxi
-
-from cef_win cimport *
+IF UNAME_SYSNAME == "Windows":
+    from cef_win cimport *
+ELIF UNAME_SYSNAME == "Darwin":
+    from cef_mac cimport *
+ELSE:
+    from cef_linux cimport *

src/platform_cimports.pxi

@@ -1,5 +1,8 @@
-# Generated by cmake_generate_pxi.py - do not edit
-# git update-index --assume-unchanged src/platform_cimports.pxi
-
-from windows cimport *
-from dpi_aware_win cimport *
+IF UNAME_SYSNAME == "Windows":
+    from windows cimport *
+    from dpi_aware_win cimport *
+ELIF UNAME_SYSNAME == "Darwin":
+    from mac cimport *
+ELSE:
+    from linux cimport *
+    cimport x11