[PATCH 04/15] Set _O_BINARY as default fmode for both MinGW and MSVC

[Marius Storm-Olsen <mstormo@gmail.com>]

MinGW set the _CRT_fmode to set both the default fmode and
_O_BINARY on stdin/stdout/stderr. Rather use the main()
define in mingw.h to set this for both MinGW and MSVC.

This will ensure that a MinGW and MSVC build will handle
input and output identically.

Alexey Borzenkov:
Include git-compat-util.h from the test-genrandom.c so
that the application also will use the main() define,
and thus the stdout mode is set correctly and generated
data stays the same.

Johannes Sixt:
Before, since the test-genrandom application would link
against libgit.a, the MinGW process initialization code
would pick up the definition of _CRT_fmode from mingw.c
that is initialized to _O_BINARY. After this patch,
however, the _CRT_fmode symbol is no longer present in
libgit.a, so MinGWs process initialization code will not
set the correct std(in|out|err) mode. So, the include is
needed to override main() and explicitly set the mode.

Signed-off-by: Marius Storm-Olsen <mstormo@gmail.com>
---
 compat/mingw.c   |    2 --
 compat/mingw.h   |    5 +++++
 test-genrandom.c |    1 +
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/compat/mingw.c b/compat/mingw.c
index 5478b74..5a8fae8 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -3,8 +3,6 @@
 #include <conio.h>
 #include "../strbuf.h"
 
-unsigned int _CRT_fmode = _O_BINARY;
-
 static int err_win_to_posix(DWORD winerr)
 {
 	int error = ENOSYS;
diff --git a/compat/mingw.h b/compat/mingw.h
index c43917c..bcd23b0 100644
--- a/compat/mingw.h
+++ b/compat/mingw.h
@@ -227,12 +227,17 @@ void free_environ(char **env);
 
 /*
  * A replacement of main() that ensures that argv[0] has a path
+ * and that default fmode and std(in|out|err) are in binary mode
  */
 
 #define main(c,v) dummy_decl_mingw_main(); \
 static int mingw_main(); \
 int main(int argc, const char **argv) \
 { \
+	_fmode = _O_BINARY; \
+	_setmode(_fileno(stdin), _O_BINARY); \
+	_setmode(_fileno(stdout), _O_BINARY); \
+	_setmode(_fileno(stderr), _O_BINARY); \
 	argv[0] = xstrdup(_pgmptr); \
 	return mingw_main(argc, argv); \
 } \
diff --git a/test-genrandom.c b/test-genrandom.c
index 8ad276d..5849599 100644
--- a/test-genrandom.c
+++ b/test-genrandom.c
@@ -6,6 +6,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include "git-compat-util.h"
 
 int main(int argc, char *argv[])
 {
-- 
1.6.2.1.418.g33d56.dirty