Test machine is a Supermicro-based server, Intel Xeon CPU E5-2609 v3 @ 1.90GHz, 32 GB RAM. platformtest can’t seem to distinguish between 11.2 and 11.3, uname -r returns “5.11”, uname -v returns “11.3”, which would be better suited here. Solaris 11.2: $ uname -a SunOS supermicro 5.11 11.2 i86pc i386 i86pc the executable works ("runs") as expected --+ tests run successfully ("make check") --+ | ngIRCd compiles ("make") --+ | | ./configure works --+ | | | | | | | Platform Compiler ngIRCd Date Tester C M T R * --------------------------- ------------ ---------- -------- -------- - - - - - i386/pc/solaris2.11 gcc 4.8.2 23 16-02-07 goetz Y Y Y Y 4 (but: make-check runs about 10mins …) Solaris 11.3: $ uname -a SunOS supermicro 5.11 11.3 i86pc i386 i86pc the executable works ("runs") as expected --+ tests run successfully ("make check") --+ | ngIRCd compiles ("make") --+ | | ./configure works --+ | | | | | | | Platform Compiler ngIRCd Date Tester C M T R * --------------------------- ------------ ---------- -------- -------- - - - - - i386/pc/solaris2.11 gcc 4.8.2 23 16-02-08 goetz Y Y Y Y 4