The source project of this merge request has been removed.
keygen2 requires also ${ARGP_LIBRARY}
I got this error when building:
[ 75%] Linking C executable keygen2.exe
ld: CMakeFiles/keygen2.dir/keygen2.c.o:keygen2.c:(.text+0x29d): undefined reference to `argp_usage'
This patch fixes it.