From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Wed, 29 Sep 2021 14:35:53 +0000 (-0700)
Subject: [3.8] bpo-44394: Ensure libexpat is linked against libm (GH-28617) (GH-28620)
X-Git-Tag: v3.8.13~33
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=90004fca1cc3c6e3c9b2c3faae5cb1b7d7711648;p=thirdparty%2FPython%2Fcpython.git

[3.8] bpo-44394: Ensure libexpat is linked against libm (GH-28617) (GH-28620)

(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 2d6b05682d2b..57be07a7e0f8 100644
--- a/setup.py
+++ b/setup.py
@@ -1578,7 +1578,9 @@ 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']