[PATCH v2] fix Mingw W64-32 cross compile failure due to printf redefinition in libintl.h

[Andrey Borzenkov <arvidjaar@gmail.com>]

In file included from util/misc.c:36:0:
./include/grub/emu/misc.h:56:1: error: 'libintl_printf' is an unrecognized format function type [-Werror=format=]
 char * EXPORT_FUNC(xasprintf) (const char *fmt, ...) __attribute__ ((format (printf, 1, 2))) WARN_UNUSED_RESULT;
 ^
./include/grub/emu/misc.h:58:1: error: 'libintl_printf' is an unrecognized format function type [-Werror=format=]

The reason is libintl.h which redefines printf as libintl_printf. The problem
is not present in native MinGW build which avoids redefinition.  Use
(format (__printf__) instead which is valid replacement in GCC.

v2: add grub-core/lib/libgcrypt/src/g10lib.h

---
 grub-core/lib/libgcrypt/src/g10lib.h | 4 ++--
 include/grub/crypto.h                | 2 +-
 include/grub/emu/misc.h              | 8 ++++----
 include/grub/err.h                   | 2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/grub-core/lib/libgcrypt/src/g10lib.h b/grub-core/lib/libgcrypt/src/g10lib.h
index 6bde20f..85a51be 100644
--- a/grub-core/lib/libgcrypt/src/g10lib.h
+++ b/grub-core/lib/libgcrypt/src/g10lib.h
@@ -47,9 +47,9 @@
 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5 )
 #define JNLIB_GCC_M_FUNCTION 1
 #define JNLIB_GCC_A_NR 	     __attribute__ ((noreturn))
-#define JNLIB_GCC_A_PRINTF( f, a )  __attribute__ ((format (printf,f,a)))
+#define JNLIB_GCC_A_PRINTF( f, a )  __attribute__ ((format (__printf__,f,a)))
 #define JNLIB_GCC_A_NR_PRINTF( f, a ) \
-			    __attribute__ ((noreturn, format (printf,f,a)))
+			    __attribute__ ((noreturn, format (__printf__,f,a)))
 #define GCC_ATTR_NORETURN  __attribute__ ((__noreturn__))
 #else
 #define JNLIB_GCC_A_NR
diff --git a/include/grub/crypto.h b/include/grub/crypto.h
index ec1b980..a24e89d 100644
--- a/include/grub/crypto.h
+++ b/include/grub/crypto.h
@@ -408,7 +408,7 @@ void _gcry_assert_failed (const char *expr, const char *file, int line,
                           const char *func) __attribute__ ((noreturn));
 
 void _gcry_burn_stack (int bytes);
-void _gcry_log_error( const char *fmt, ... )  __attribute__ ((format (printf, 1, 2)));
+void _gcry_log_error( const char *fmt, ... )  __attribute__ ((format (__printf__, 1, 2)));
 
 
 #ifdef GRUB_UTIL
diff --git a/include/grub/emu/misc.h b/include/grub/emu/misc.h
index dde48c1..a588ba2 100644
--- a/include/grub/emu/misc.h
+++ b/include/grub/emu/misc.h
@@ -53,11 +53,11 @@ grub_util_device_is_mapped (const char *dev);
 void * EXPORT_FUNC(xmalloc) (grub_size_t size) WARN_UNUSED_RESULT;
 void * EXPORT_FUNC(xrealloc) (void *ptr, grub_size_t size) WARN_UNUSED_RESULT;
 char * EXPORT_FUNC(xstrdup) (const char *str) WARN_UNUSED_RESULT;
-char * EXPORT_FUNC(xasprintf) (const char *fmt, ...) __attribute__ ((format (printf, 1, 2))) WARN_UNUSED_RESULT;
+char * EXPORT_FUNC(xasprintf) (const char *fmt, ...) __attribute__ ((format (__printf__, 1, 2))) WARN_UNUSED_RESULT;
 
-void EXPORT_FUNC(grub_util_warn) (const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
-void EXPORT_FUNC(grub_util_info) (const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
-void EXPORT_FUNC(grub_util_error) (const char *fmt, ...) __attribute__ ((format (printf, 1, 2), noreturn));
+void EXPORT_FUNC(grub_util_warn) (const char *fmt, ...) __attribute__ ((format (__printf__, 1, 2)));
+void EXPORT_FUNC(grub_util_info) (const char *fmt, ...) __attribute__ ((format (__printf__, 1, 2)));
+void EXPORT_FUNC(grub_util_error) (const char *fmt, ...) __attribute__ ((format (__printf__, 1, 2), noreturn));
 
 grub_uint64_t EXPORT_FUNC (grub_util_get_cpu_time_ms) (void);
 
diff --git a/include/grub/err.h b/include/grub/err.h
index 9896fcc..1590c68 100644
--- a/include/grub/err.h
+++ b/include/grub/err.h
@@ -91,6 +91,6 @@ int EXPORT_FUNC(grub_error_pop) (void);
 void EXPORT_FUNC(grub_print_error) (void);
 extern int EXPORT_VAR(grub_err_printed_errors);
 int grub_err_printf (const char *fmt, ...)
-     __attribute__ ((format (printf, 1, 2)));
+     __attribute__ ((format (__printf__, 1, 2)));
 
 #endif /* ! GRUB_ERR_HEADER */
-- 
tg: (5ef569d..) u/mingw/attribute_printf (depends on: master)