Disable LTO.

mpdecimal.spec

@@ -3,7 +3,7 @@
 
 Name:           mpdecimal
 Version:        2.4.2
-Release:        13%{?dist}
+Release:        14%{?dist}
 Summary:        Library for general decimal arithmetic
 License:        BSD
 
@@ -46,6 +46,12 @@ The package contains documentation for the mpdecimal library.
 unzip -d tests/testdata %{SOURCE1}
 
 %build
+# configure tests try to compile code containing ASMs to a .o file
+# In an LTO world, that always works as compilation does not happen until
+# link time.  As a result we get the wrong results from configure.
+# Disable LTO.
+%define _lto_cflags %{nil}
+
 %configure
 make %{?_smp_mflags}
 
@@ -80,6 +86,9 @@ fi
 %ldconfig_scriptlets
 
 %changelog
+* Tue Jun 30 2020 Jeff Law <law@redhat.com> - 2.4.2-14
+Disable LTO
+
 * Wed Jan 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.4.2-13
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild