science/simlib: Fix build

- Doesn't build with Clang 6

errors.cc:14:42: error: invalid suffix on literal; C++11 requires a space between
      literal and identifier [-Wreserved-user-defined-literal]
/* 0 */ "SIMLIB/C++ Simulation Library, "SIMLIB_COPYRIGHT"\0"
                                         ^

http://beefy12.nyi.freebsd.org/data/head-amd64-default/p473790_s335878/logs/simlib-3.02_1.log

- nm crashes during the build on FreeBSD >= 11.1.  Use binutils
  from ports as a workaround. [1]

Assertion failed: (ddata->output.size > 0), function cpp_demangle_read_sname, file /usr/src/contrib/elftoolchain/libelftc/libelftc_dem_gnu3.c, line 2137.

http://beefy9.nyi.freebsd.org/data/111amd64-default/473790/logs/simlib-3.02_1.log

PR:		223333 [1]

1 files changed, 9 insertions, 0 deletions

diff --git a/science/simlib/Makefile b/science/simlib/Makefile
index fa3b6d83614c..c960aea1fea4 100644
--- a/science/simlib/Makefile
+++ b/science/simlib/Makefile
@@ -20,6 +20,15 @@ CXXFLAGS+=	-fPIC
 NOT_FOR_ARCHS=		aarch64 armv6 armv7 mips mips64 powerpc powerpc64 sparc64
 NOT_FOR_ARCHS_REASON=	contains not working ${ARCH}-dependent assembly code
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1101000
+# nm crashes during the build:
+# Assertion failed: (ddata->output.size > 0), function cpp_demangle_read_sname, file /usr/src/contrib/elftoolchain/libelftc/libelftc_dem_gnu3.c, line 2137.
+USE_BINUTILS=	yes
+BINARY_ALIAS=	nm=${NM}
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e 's|make|gmake|g' ${WRKSRC}/Makefile
 	@${REINPLACE_CMD} -e 's#%%PREFIX%%#${PREFIX}#g' \