pkg/51931: pkgtools/pbulk-base build fails due to unused result

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>Number:         51931
>Category:       pkg
>Synopsis:       pkgtools/pbulk-base build fails due to unused result
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 01 02:55:00 +0000 2017
>Originator:     Sevan Janiyan
>Release:        pkgsrc-current
>Organization:
>Environment:
Linux ibm 4.4.0-59-generic #80-Ubuntu SMP Fri Jan 6 17:35:59 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux

>Description:

cc -O2  -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-uninitialized -Wreturn-type -Wcast-qual -Wpointer-arith -Wwrite-strings -Wswitch -Wshadow -Werror  -DHAVE_NBCOMPAT_H=1 -I/tmp/obj-pbulk/pkgtools/pbulk-base/work/libnbcompat -D_GNU_SOURCE -c event.c
event.c: In function 'signal_handler':
event.c:272:2: error: ignoring return value of 'write', declared with attribute warn_unused_result [-Werror=unused-result]
  write(signal_pipe[1], &buf, 1);
  ^
cc1: all warnings being treated as errors


Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/powerpc64le-linux-gnu/5/lto-wrapper
Target: powerpc64le-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/IBM 5.4.0-6ubuntu1~16.04.4' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-ppc64el/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-ppc64el --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-ppc64el --with-arch-directory=ppc64le --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-secureplt --with-cpu=power8 --enable-
 targets=powerpcle-linux --disable-multilib --enable-multiarch --disable-werror --with-long-double-128 --enable-checking=release --build=powerpc64le-linux-gnu --host=powerpc64le-linux-gnu --target=powerpc64le-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.4)
>How-To-Repeat:

>Fix: