From 97c8845fe7393e8371e9f58dd319e0d7dd4f70d3 Mon Sep 17 00:00:00 2001
From: Matthias Klose <doko@debian.org>
Date: Thu, 17 Mar 2022 07:20:01 +0000
Subject: [PATCH] build-math-object

Gbp-Pq: Name build-math-object.diff
---
 Makefile.pre.in | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Makefile.pre.in b/Makefile.pre.in
index fa3c07a..4cc0182 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -22,7 +22,8 @@
 
 MODBUILT_NAMES=    _MODBUILT_NAMES_
 MODDISABLED_NAMES= _MODDISABLED_NAMES_
-MODOBJS=           _MODOBJS_
+# filter out duplicate object files (_math.o)
+MODOBJS=           $(sort _MODOBJS_)
 MODLIBS=           _MODLIBS_
 
 # === Variables set by configure
@@ -621,8 +622,9 @@ pybuilddir.txt: $(BUILDPYTHON)
 	fi
 
 # This is shared by the math and cmath modules
+# don't build with -fPIC when building as math and cmath as builtins
 Modules/_math.o: Modules/_math.c Modules/_math.h
-	$(CC) -c $(CCSHARED) $(PY_CORE_CFLAGS) -o $@ $<
+	$(CC) -c $(if $(findstring _math.o, $(MODOBJS)),,$(CCSHARED)) $(PY_CORE_CFLAGS) -o $@ $<
 
 # blake2s is auto-generated from blake2b
 $(srcdir)/Modules/_blake2/blake2s_impl.c: $(srcdir)/Modules/_blake2/blake2b_impl.c $(srcdir)/Modules/_blake2/blake2b2s.py
-- 
2.30.2