mtbl: ftbfs with eglibc-2.17

Imported from Debian bug http://bugs.debian.org/701405:

Package: src:mtbl
Version: 0.2-1
Severity: important
Tags: sid jessie
User: <email address hidden>
Usertags: ftbfs-glibc-2.17

The package fails to build in a test rebuild on at least amd64 with
eglibc-2.17, but succeeds to build with eglibc-2.13. The
severity of this report may be raised before the jessie release.

The test rebuild was done together with GCC-4.8, so some issues
might be caused by the updated GCC as well.

  src/mtbl_merge.c:67:1: error: conflicting types for 'timespec_get'

The full build log can be found at:
http://people.debian.org/~doko/logs-20130217/gcc48/mtbl_0.2-1_unstable_gcc48.log
The last lines of the build log are at the end of this report.

To install eglibc from experimental,

  apt-get -t experimental install libc6-dev

To build with GCC 4.8, either set CC=gcc-4.8 CXX=g++-4.8 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t experimental install g++ g++-4.7 g++-4.8 libc6-dev

[...]
        compiler: gcc -std=gnu99
        cflags: -g -O2
        ldflags:
        libs: -ldl -lz -lsnappy

        prefix: /usr
        sysconfdir: /etc
        libdir: ${exec_prefix}/lib
        includedir: ${prefix}/include

   dh_auto_build -a
make[1]: Entering directory `/«PKGBUILDDIR»'
make all-am
make[2]: Entering directory `/«PKGBUILDDIR»'
  CC librsf/crc32c.lo
  CC librsf/heap.lo
  CC librsf/rsf_fileset.lo
  CC mtbl/block.lo
  CC mtbl/block_builder.lo
  CC mtbl/crc32c_wrap.lo
  CC mtbl/fileset.lo
  CC mtbl/fixed.lo
  CC mtbl/iter.lo
  CC mtbl/merger.lo
  CC mtbl/reader.lo
  CC mtbl/sorter.lo
  CC mtbl/source.lo
  CC mtbl/trailer.lo
  CC mtbl/varint.lo
  CC mtbl/writer.lo
  CCLD mtbl/libmtbl.la
  CC src/mtbl_dump.o
  CCLD src/mtbl_dump
  CC src/mtbl_info.o
  CCLD src/mtbl_info
  CC src/mtbl_merge.o
src/mtbl_merge.c:67:1: error: conflicting types for 'timespec_get'
 timespec_get(struct timespec *now) {
 ^
In file included from src/mtbl_merge.c:24:0:
/usr/include/time.h:386:12: note: previous declaration of 'timespec_get' was here
 extern int timespec_get (struct timespec *__ts, int __base)
            ^
make[2]: *** [src/mtbl_merge.o] Error 1
make[2]: Leaving directory `/«PKGBUILDDIR»'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/«PKGBUILDDIR»'
dh_auto_build: make -j1 returned exit code 2
make: *** [build-arch] Error 2
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2