python · zanieb · May 19, 2025 · May 19, 2025 · May 19, 2025 · May 20, 2025
diff --git a/Misc/NEWS.d/next/Build/2025-05-19-18-09-20.gh-issue-134273.ZAliyy.rst b/Misc/NEWS.d/next/Build/2025-05-19-18-09-20.gh-issue-134273.ZAliyy.rst
@@ -0,0 +1 @@
+Respect CFLAGS set during configure during JIT builds
@@ -10,6 +10,7 @@
 import sys
 import tempfile
 import typing
+import shlex

 import _llvm
 import _schema
@@ -46,6 +47,7 @@ class _Target(typing.Generic[_S, _R]):
    stable: bool = False
    debug: bool = False
    verbose: bool = False
+    cflags: str = ""
    known_symbols: dict[str, int] = dataclasses.field(default_factory=dict)

    def _get_nop(self) -> bytes:
@@ -61,6 +63,7 @@ def _compute_digest(self, out: pathlib.Path) -> str:
        hasher = hashlib.sha256()
        hasher.update(self.triple.encode())
        hasher.update(self.debug.to_bytes())
+        hasher.update(self.cflags.encode())
        # These dependencies are also reflected in _JITSources in regen.targets:
        hasher.update(PYTHON_EXECUTOR_CASES_C_H.read_bytes())
        hasher.update((out / "pyconfig.h").read_bytes())
@@ -119,6 +122,7 @@ async def _compile(
    ) -> _stencils.StencilGroup:
        o = tempdir / f"{opname}.o"
        args = [
+            *shlex.split(self.cflags),
            f"--target={self.triple}",
            "-DPy_BUILD_CORE_MODULE",
            "-D_DEBUG" if self.debug else "-DNDEBUG",

@@ -26,11 +26,15 @@
    parser.add_argument(
        "-v", "--verbose", action="store_true", help="echo commands as they are run"
    )
+    parser.add_argument(
+        "--with-cflags", help="additional flags to pass to the compiler", default=""
+    )
    args = parser.parse_args()
    for target in args.target:
        target.debug = args.debug
        target.force = args.force
        target.verbose = args.verbose
+        target.cflags = args.with_cflags
        target.build(
            out,
            comment=comment,

@@ -2776,7 +2776,7 @@ AS_VAR_IF([jit_flags],
          [],
          [AS_VAR_APPEND([CFLAGS_NODIST], [" $jit_flags"])
           AS_VAR_SET([REGEN_JIT_COMMAND],
-                      ["\$(PYTHON_FOR_REGEN) \$(srcdir)/Tools/jit/build.py ${ARCH_TRIPLES:-$host}"])
+                      ["\$(PYTHON_FOR_REGEN) \$(srcdir)/Tools/jit/build.py ${ARCH_TRIPLES:-$host} --with-cflags=\"\$(CONFIGURE_CFLAGS)\""])
           AS_VAR_SET([JIT_STENCILS_H], ["jit_stencils.h"])
           AS_VAR_IF([Py_DEBUG],
                     [true],
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Respect CFLAGS set during configure during JIT builds