Created attachment 7251 [details]
proposed fix.  this has not been sent upstream yet.

Glibc bump to 2.26 exposed this missing header when building
with the following combination using a internal toolchain.
Arch: i686
gcc5.4.0
glibc2.26
bin2.28.1
linux4.1.43

Logfile snippet:

2017-10-02T00:08:11 ^
2017-10-02T00:08:12 rpc.c: In function ‘nsm_recv_getport’:
2017-10-02T00:08:12 rpc.c:469:13: error: ‘UINT16_MAX’ undeclared (first use in this function)
2017-10-02T00:08:12 if (port > UINT16_MAX) {
2017-10-02T00:08:12 ^
2017-10-02T00:08:12 rpc.c:469:13: note: each undeclared identifier is reported only once for each function it appears in
2017-10-02T00:08:12 rpc.c: In function ‘nsm_recv_getaddr’:
2017-10-02T00:08:12 rpc.c:506:25: error: ‘UINT16_MAX’ undeclared (first use in this function)
2017-10-02T00:08:12 if (port < 0 || port > UINT16_MAX) {
2017-10-02T00:08:12 ^
2017-10-02T00:08:12 Makefile:452: recipe for target 'rpc.o' failed
2017-10-02T00:08:12 make[5]: *** [rpc.o] Error 1
2017-10-02T00:08:12 make[5]: *** Waiting for unfinished jobs....
2017-10-02T00:08:12 Makefile:393: recipe for target 'all' failed
2017-10-02T00:08:12 make[4]: *** [all] Error 2
2017-10-02T00:08:12 Makefile:426: recipe for target 'all-recursive' failed
2017-10-02T00:08:12 make[3]: *** [all-recursive] Error 1
2017-10-02T00:08:12 Makefile:468: recipe for target 'all-recursive' failed
2017-10-02T00:08:12 make[2]: *** [all-recursive] Error 1
2017-10-02T00:08:12 package/pkg-generic.mk:234: recipe for target '/home/gitlab-runner/builds/9d7dc3b9/2/rclinux/rc-bsp/target_build/build/nfs-utils-1.3.3/.stamp_built' failed