fixdep: read the dependency files in binary mode

We want to make sure that the original line endings are preserved, as
fixdep hardcodes the assumption of Unix-type line endings.

The symptom is this (kinda hard to understand) error when building in
Git for Windows' SDK (which is a special-purpose version of MSYS2):

$ make mingw64_defconfig && make -j15
   HOSTCC  scripts/basic/fixdep
C:/git-sdk-64/mingw64/x86_64-w64-mingw32/include/ctype.h
64-w64-mingw32/include/ctype.h: Invalid argument
fixdep: make[1]: *** [scripts/Makefile.host:104: scripts/basic/fixdep] Error 2
make: *** [Makefile:358: scripts_basic] Error 2

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

1 files changed, 6 insertions, 2 deletions

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index f012551af..7bb808b9e 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -126,6 +126,10 @@
 #define INT_FIG_ ntohl(0x4649475f)
 */
 
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
 #ifdef __MINGW32__
 #define UNUSED __attribute__ ((__unused__))
 
@@ -337,7 +341,7 @@ void do_config_file(char *filename)
         int fd;
         void *map;
 
-        fd = open(filename, O_RDONLY);
+        fd = open(filename, O_RDONLY | O_BINARY);
         if (fd < 0) {
                 fprintf(stderr, "fixdep: ");
                 perror(filename);
@@ -408,7 +412,7 @@ void print_deps(void)
         int fd;
         void *map;
 
-        fd = open(depfile, O_RDONLY);
+        fd = open(depfile, O_RDONLY | O_BINARY);
         if (fd < 0) {
                 fprintf(stderr, "fixdep: ");
                 perror(depfile);