Mozilla build error on Mac OS X

gistfile1.txt

 0:02.74 /Users/awilcox/Code/moz/mozilla-central/obj-ff-dbg/mozglue/build/tmpsLK3Ew.l
 0:02.74     ../../memory/build/jemalloc_config.o
 0:02.74     ../../memory/build/mozmemory_wrap.o
 0:02.74     ../../memory/mozjemalloc/jemalloc.o
 0:02.74     ../../mfbt/bignum-dtoa.o
 0:02.74     ../../mfbt/bignum.o
 0:02.74     ../../mfbt/cached-powers.o
 0:02.75     ../../mfbt/diy-fp.o
 0:02.75     ../../mfbt/double-conversion.o
 0:02.75     ../../mfbt/fast-dtoa.o
 0:02.75     ../../mfbt/fixed-dtoa.o
 0:02.75     ../../mfbt/strtod.o
 0:02.75     ../../mfbt/HashFunctions.o
 0:02.75     ../../mfbt/Poison.o
 0:02.75     ../../mfbt/SHA1.o
 0:02.75     ../../mfbt/Decimal.o
 0:02.75
 0:02.75 duplicate symbol ___sputc in:
 0:02.75     ../../memory/build/jemalloc_config.o
 0:02.75     ../../memory/mozjemalloc/jemalloc.o
 0:02.75 duplicate symbol ___sigbits in:
 0:02.75     ../../memory/build/jemalloc_config.o
 0:02.75     ../../memory/mozjemalloc/jemalloc.o
 0:02.75 ld: 2 duplicate symbols for architecture x86_64
 0:02.75 clang: error: linker command failed with exit code 1 (use -v to see invocati
 0:02.75 make[6]: *** [libmozglue.dylib] Error 1
 0:02.75 make[5]: *** [libs] Error 2
 0:02.75 make[4]: *** [libs_tier_base] Error 2
 0:02.75 make[3]: *** [tier_base] Error 2
 0:02.75 make[2]: *** [default] Error 2
 0:02.75 make[1]: *** [realbuild] Error 2
 0:02.75 make: *** [build] Error 2
 0:02.77 0 compiler warnings present.
awilcox on ind-wkst040 mozilla-central:                          [s008 Mon 15 17:51]