FYI, there is a C++11 narrowing error in common/core_display.cc:

--- a/common/core_display.cc
+++ b/common/core_display.cc
@@ -44,1 +44,1 @@
-static char bigchars[130][5] =
+static unsigned char bigchars[130][5] =

and what it all means

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This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle.
Changing version to '26'.

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Summary: update 1.5.7 → update 2.0.24
http://www.thomasokken.com/free42/

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Fedora 28. It is Fedora's policy to close all bug reports from releases
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Free42 2.x changed to a different decimal arithmetic library by Intel which doesn't pass its tests on x86_64, so there is no plan to update Free42 on Fedora to 2.x in the near future.

My previous comment is incorrect. The idfpml library fails the tests on ARM.