On Wed, 9 Dec 2015, Paul Overton wrote:

However when I attempt to compile the programs 3.14 or 3.15 I get the following 
error:

<stdout>: In function 'yy_scan_bytes':

<stdout>:2169:17: error: comparison between signed and unsigned integer 
expressions
[-Werror=sign-compare]

cc1: all warnings being treated as errors

make[3]: *** [lex.yy.o] Error 1

make[3]: Leaving directory 
`/usr/src/libreswan-3.14/OBJ.linux.x86_64/lib/libipsecconf'

make[2]: *** [local-base] Error 2

Can you try

http://download.libreswan.org/development/libreswan-3.16rc2.tar.gz

and let us know if that resolves your problem? We did some tweaks to
support various older/newer combinations of flex/bison recently.

A quick workaround is to use: export WERROR_CFLAGS=''

Could anyone give me a clue as to what changed between 3.13 and 3.14 that would 
cause this issue ?

We turned all warnings into errors :)

Paul
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