This reverts commit
b8dd176441f6ba9527d24a5065d8225437fe39d5.
This wasn't the problem, and mingw doesn't even use _LARGEFILE_SOURCE. The real problem (using WIN32 instead of _WIN32 in external/llvm) is fixed now.
Change-Id: I2b708a006b530cb18d03b1425cd65edda35ee17e
# Admit to using >= Win2K.
$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -D_WIN32_WINNT=0x0500
# Get 64-bit off_t and related functions.
-$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1
+$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -D_FILE_OFFSET_BITS=64
$(combo_2nd_arch_prefix)HOST_CC := $(TOOLS_PREFIX)gcc$(TOOLS_EXE_SUFFIX)
$(combo_2nd_arch_prefix)HOST_CXX := $(TOOLS_PREFIX)g++$(TOOLS_EXE_SUFFIX)