fix: sysconfig (#1858)

Author: mayeut

docker/build_scripts/build-cpython.sh

@@ -73,6 +73,8 @@ unset _PYTHON_HOST_PLATFORM
 # configure with hardening options only for the interpreter & stdlib C extensions
 # do not change the default for user built extension (yet?)
 ./configure \
+	CC=gcc \
+	CXX=g++ \
 	CFLAGS_NODIST="${MANYLINUX_CFLAGS} ${MANYLINUX_CPPFLAGS}" \
 	LDFLAGS_NODIST="${MANYLINUX_LDFLAGS} ${LDFLAGS_EXTRA}" \
 	"--prefix=${PREFIX}" "${CONFIGURE_ARGS[@]}" > /dev/null

docker/tests/modules-check.py

@@ -1,3 +1,6 @@
+import os
+import sys
+import sysconfig
 import unittest
 
 
@@ -7,7 +10,7 @@ def test_sqlite3(self):
         # c.f. https://github.com/pypa/manylinux/issues/1030
         import sqlite3
 
-        print(f"{sqlite3.sqlite_version=}", end=" ", flush=True)
+        print(f"{sqlite3.sqlite_version=}", end=" ", file=sys.stderr)
         assert sqlite3.sqlite_version_info[0:2] >= (3, 50)
 
         # When the extension is not installed, it raises:
@@ -19,7 +22,7 @@ def test_tkinter(self):
         # Make sure tkinter module can be loaded properly
         import tkinter as tk
 
-        print(f"{tk.TkVersion=}", end=" ", flush=True)
+        print(f"{tk.TkVersion=}", end=" ", file=sys.stderr)
         assert tk.TkVersion >= 8.6
 
     def test_gdbm(self):
@@ -38,12 +41,27 @@ def test_ncurses(self):
         # depends on libncurses
         import curses
 
-        print(f"{curses.ncurses_version=}", end=" ", flush=True)
+        print(f"{curses.ncurses_version=}", end=" ", file=sys.stderr)
 
     def test_ctypes(self):
         # depends on libffi
         import ctypes  # noqa: F401
 
+    def test_sysconfig(self):
+        config_vars = sysconfig.get_config_vars()
+        cc = config_vars["CC"]
+        cxx = config_vars["CXX"]
+        pthread = (
+            " -pthread"
+            if os.environ["AUDITWHEEL_POLICY"]
+            in {"manylinux2014", "manylinux_2_28", "manylinux_2_31"}
+            else ""
+        )
+        assert cc == f"gcc{pthread}", cc
+        assert cxx == f"g++{pthread}", cxx
+        assert config_vars["LDSHARED"] == f"{cc} -shared", config_vars["LDSHARED"]
+        assert config_vars["LDCXXSHARED"] == f"{cxx} -shared", config_vars["LDCXXSHARED"]
+
 
 if __name__ == "__main__":
     unittest.main(verbosity=2)