msysgit: Add the --large-address-aware linker directive to the makefile.

This has the effect of increasing the address space from 2GB to 4GB under
64-bit Windows, reducing the likelihood of an "out of memory" error when e.g.
repacking a large repository.  The test suite passes with this patch, with and
without the MEM_TOP_DOWN flag added to all VirtualAlloc calls.  While this is
no guarantee that there are no issues with large memory support (it could break
Git on other setups than mine, for example), it at least increases the chance
that nothing obvious goes wrong (such as errors introduced by faulty sign
extension, say, with ssize_t).

[PT: Resolves github issue #12]

Signed-off-by: Pierre le Riche <[email protected]>
Signed-off-by: Pat Thoyts <[email protected]>

Author: pleriche

Makefile

@@ -1339,6 +1339,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	COMPAT_OBJS += compat/mingw.o compat/winansi.o \
 		compat/win32/pthread.o compat/win32/syslog.o \
 		compat/win32/poll.o compat/win32/dirent.o
+	BASIC_LDFLAGS += -Wl,--large-address-aware
 	EXTLIBS += -lws2_32
 	GITLIBS += git.res
 	PTHREAD_LIBS =