The respun adastrap has introduced a hard dependency on gmp 6.1.1, save people some debug time:
Index: Makefile =================================================================== RCS file: /home/vcs/cvs/openbsd/ports/lang/gcc/4.9/Makefile,v retrieving revision 1.44 diff -u -p -r1.44 Makefile --- Makefile 11 Nov 2016 20:13:43 -0000 1.44 +++ Makefile 15 Nov 2016 09:47:21 -0000 @@ -207,7 +207,7 @@ WANTLIB-main = ${WANTLIB} WANTLIB-ada = ${WANTLIB} pthread util WANTLIB-libs = m pthread -LIB_DEPENDS += devel/gmp>=4.2 \ +LIB_DEPENDS += devel/gmp>=6.1.1 \ devel/mpfr \ devel/libmpc LIB_DEPENDS-libs =