Created attachment 861284 [details] build log Missing BDEPEND: - sys-devel/flex - sys-devel/bison
Note: GMP specifically wants sys-devel/flex. app-alternatives/lex does not suffice, as sys-devel/reflex does not satisfy GMP.
Created attachment 915786 [details] build.log for this issue under gmp-6.3.0-r1 This is the build.log that I received to send me to this ticket.
Created attachment 915787 [details] config.log for this issue under gmp-6.3.0-r1 ... and this is the config.log that the build.log asked me to include.