lsof fails to build on darwin

[jwiegley]

I get this output:

cc  -DHASIPv6=1  -DLINUXV=131000 -DHASIPv6 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -DHAS_STRFTIME -DLSOF_VSTR=\"13.1.0\"    -O   -c -o dfile.o dfile.c
In file included from lsof.h:195:0,
                 from dfile.c:39:
dlsof.h:45:20: fatal error: malloc.h: No such file or directory
 #include <malloc.h>
                    ^
compilation terminated.

This is blocking me from getting git-annex to build, among other problems.

[thoughtpolice]

Relaying what I said in IRC:

10:25 < thoughtpolice> johnw: i think you need to make configurePhase for lsof do './Configure -n darwin' when 
                       stdenv.isDarwin == true
10:25 < thoughtpolice> johnw: right now it just always does './Configure -n linux'

[jwiegley]

Right, just figured that out and sent a pull request. :) Still getting familiar with this configuration system.