*: fix builds by disregarding warning from new glibc

Says: #warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
CC: #4803. There will likely appear more of these errors on Hydra in time.

pkgs/applications/networking/browsers/netsurf/libwapcaplet.nix

@@ -7,6 +7,8 @@ stdenv.mkDerivation {
                (fetchurl { url = "http://mawercer.de/~nix/repos/libwapcaplet-9721.tar.gz"; sha256 = "7f9f32ca772c939d67f3bc8bf0705544c2b2950760da3fe6a4e069ad0f77d91a"; });
   # END
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=cpp";
+
   installPhase = "make PREFIX=$out install";
   buildInputs = [];
 

pkgs/development/compilers/go/default.nix

@@ -60,6 +60,8 @@ stdenv.mkDerivation {
           else throw "Unsupported system";
   GOARM = stdenv.lib.optionalString (stdenv.system == "armv5tel-linux") "5";
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=cpp";
+
   installPhase = ''
     mkdir -p "$out/bin"
     export GOROOT="$(pwd)/"

pkgs/development/tools/misc/tcptrack/default.nix

@@ -12,6 +12,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ ncurses libpcap ];
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=cpp";
+
   meta = with stdenv.lib; {
     description = "libpcap based program for live TCP connection monitoring";
     homepage = http://www.rhythm.cx/~steve/devel/tcptrack/; # dead link

pkgs/os-specific/linux/kernel/perf.nix

@@ -25,6 +25,8 @@ stdenv.mkDerivation {
   buildInputs = [ elfutils python perl newt slang pkgconfig] ++
     stdenv.lib.optional withGtk gtk;
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=cpp";
+
   installFlags = "install install-man ASCIIDOC8=1";
 
   inherit elfutils;

pkgs/tools/networking/inadyn/default.nix

@@ -17,6 +17,8 @@ stdenv.mkDerivation {
 
   buildInputs = [ gnutls ];
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=cpp";
+
   meta = {
     homepage = http://inadyn.sourceforge.net/;
     description = "Free dynamic DNS client";