build/pkgs/matplotlib/make-setup-config.py: Disable LTO

Author: Matthias Koeppe

build/pkgs/matplotlib/make-setup-config.py

@@ -8,6 +8,10 @@
 
 config.add_section('libs')
 config.set('libs', 'system_freetype', 'True')
+# lto is problematic if we mix libraries from the OS with our own libraries,
+# which are not necessarily compiled with the same gcc version
+# https://trac.sagemath.org/ticket/27754
+config.set('libs', 'enable_lto', 'False')
 
 #####################################################################
 # Sage code -- all this code just sets the graphical_backend variable.