From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Wed, 29 Sep 2021 14:13:41 +0000 (-0700)
Subject: [3.10] bpo-44394: Ensure libexpat is linked against libm (GH-28617) (GH-28621)
X-Git-Tag: v3.10.1~246
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=412ae8ab10734b72384c969181919cc4eb154406;p=thirdparty%2FPython%2Fcpython.git

[3.10] bpo-44394: Ensure libexpat is linked against libm (GH-28617) (GH-28621)

* bpo-44394: Ensure libexpat is linked against libm (GH-28617)
(cherry picked from commit 6c1154b9de29e1c9cd3d05f5289543e5cff73895)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
---

diff --git a/setup.py b/setup.py
index 3d250e7249d7..a6fcc12b84d0 100644
--- a/setup.py
+++ b/setup.py
@@ -1765,7 +1765,9 @@ class PyBuildExt(build_ext):
                 ('XML_POOR_ENTROPY', '1'),
             ]
             extra_compile_args = []
-            expat_lib = []
+            # bpo-44394: libexpat uses isnan() of math.h and needs linkage
+            # against the libm
+            expat_lib = ['m']
             expat_sources = ['expat/xmlparse.c',
                              'expat/xmlrole.c',
                              'expat/xmltok.c']