With up-to-date sources, I got:
# create libstdc++-v3/ext-inst.d
CC=/build/netbsd-local/tools/x86_64/amd64/bin/x86_64--netbsd-c++
/build/netbsd-local/tools/x86_64/amd64/bin/nbmkdep -f ext-inst.d.tmp --
-I/build/netbsd-local/dest/amd64/usr/include/g++/backward
--sysroot=/build/netbsd-local/dest/amd64
-I/build/netbsd-local/src/external/gpl3/gcc.old/dist/gcc
-I/build/netbsd-local/src/external/gpl3/gcc.old/dist/include
-I/build/netbsd-local/src/external/gpl3/gcc.old/dist/libstdc++-v3/libsupc++
-I/build/netbsd-local/src/external/gpl3/gcc.old/dist/libgcc
-I/build/netbsd-local/src/external/gpl3/gcc.old/lib/libstdc++-v3/../libstdc++-v3/arch/x86_64
-I. -DHAVE_STDLIB_H -DHAVE_STRING_H
-I/build/netbsd-local/src/external/gpl3/gcc.old/dist/libstdc++-v3/include
-I/build/netbsd-local/src/external/gpl3/gcc.old/lib/libstdc++-v3/arch/x86_64
-D_GLIBCXX_SHARED -DGTHREAD_USE_WEAK -DSUPPORTS_WEAK
/build/netbsd-local/src/external/gpl3/gcc.old/dist/libstdc++-v3/src/c++98/ext-inst.cc
&& mv ext-inst.d.tmp ext-inst.d
In file included from
/build/netbsd-local/src/external/gpl3/gcc.old/dist/libstdc++-v3/include/ext/rope:56:0,
from
/build/netbsd-local/src/external/gpl3/gcc.old/dist/libstdc++-v3/src/c++98/ext-inst.cc:29:
/build/netbsd-local/src/external/gpl3/gcc.old/dist/libstdc++-v3/include/tr1/functional:1336:2:
error: #endif without #if
nbmkdep: compile failed.
*** [ext-inst.d] Error code 1
+------------------+--------------------------+-------------------------+
| Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
| (Retired) | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org |
+------------------+--------------------------+-------------------------+
