Subject: Re: [PATCH 08/14] MINGW: git-compat-util.h: use inttypes.h for printf macros

From: Junio C Hamano <[email-masked]>
Date: Wed, 08 Oct 2014 12:25:44 -0700

Marat Radchenko <[email-masked]> writes:

> All MinGW flavors have inttypes.h, so just include it.
>
> However, we need to pass -D__USE_MINGW_ANSI_STDIO=1 to select
> GNU-compatible macro definitions on MinGW-W64:
> http://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/
>
> As a side-effect, Git no longer builds with MSVC < 2010 due to
> its lack of stdint.h but hopefully that is not a problem.

That "hopefully" does not build much confidence.

"All have inttypes.h, so just include it" does not say why it is a
good idea to do so, if the source before this patch built OK without
including it.

    Bad things like this and that happen because the current code
    does not include inttypes.h, but the header exists everywhere so
    we can fix this and that by including it.

would be more understandable, but otherwise, it is unclear what
problems it attempts to fix, and if it is an improvement overall to
trade it off with the possible breakage on some systems.

The log message also needs to explain why inclusion order in
git-compat-util.h must be changed.  What problem does that change
fix?

> Signed-off-by: Marat Radchenko <[email-masked]>
> ---
>  compat/mingw.h    |  2 --
>  compat/msvc.h     |  3 +++
>  config.mak.uname  |  3 ++-
>  git-compat-util.h | 11 ++++++-----
>  4 files changed, 11 insertions(+), 8 deletions(-)
>
> diff --git a/compat/mingw.h b/compat/mingw.h
> index ba05044..59a50fc 100644
> --- a/compat/mingw.h
> +++ b/compat/mingw.h
> @@ -358,8 +358,6 @@ static inline char *mingw_find_last_dir_sep(const char *path)
>  int mingw_offset_1st_component(const char *path);
>  #define offset_1st_component mingw_offset_1st_component
>  #define PATH_SEP ';'
> -#define PRIuMAX "I64u"
> -#define PRId64 "I64d"
>  
>  void mingw_open_html(const char *path);
>  #define open_html mingw_open_html
> diff --git a/compat/msvc.h b/compat/msvc.h
> index a63d878..84a03f9 100644
> --- a/compat/msvc.h
> +++ b/compat/msvc.h
> @@ -17,6 +17,9 @@
>  
>  typedef int pid_t;
>  
> +#define PRIuMAX "I64u"
> +#define PRId64 "I64d"
> +
>  static __inline int strcasecmp (const char *s1, const char *s2)
>  {
>  	int size1 = strlen(s1);
> diff --git a/config.mak.uname b/config.mak.uname
> index 4470a928..c7aaa1c 100644
> --- a/config.mak.uname
> +++ b/config.mak.uname
> @@ -328,6 +328,7 @@ ifeq ($(uname_S),Windows)
>  	NO_PREAD = YesPlease
>  	NEEDS_CRYPTO_WITH_SSL = YesPlease
>  	NO_LIBGEN_H = YesPlease
> +	NO_INTTYPES_H = UnfortunatelyYes
>  	NO_POLL = YesPlease
>  	NO_SYMLINK_HEAD = YesPlease
>  	NO_IPV6 = YesPlease
> @@ -510,7 +511,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
>  	NO_POSIX_GOODIES = UnfortunatelyYes
>  	DEFAULT_HELP_FORMAT = html
>  	NO_D_INO_IN_DIRENT = YesPlease
> -	COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -DNOGDI -Icompat -Icompat/win32
> +	COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -D__USE_MINGW_ANSI_STDIO=1 -DNOGDI -Icompat -Icompat/win32
>  	ifneq (,$(findstring i686,$(CC_MACH)))
>  		COMPAT_CFLAGS += -D_USE_32BIT_TIME_T
>  		BASIC_LDFLAGS += -Wl,--large-address-aware
> diff --git a/git-compat-util.h b/git-compat-util.h
> index fb41118..b338277 100644
> --- a/git-compat-util.h
> +++ b/git-compat-util.h
> @@ -96,6 +96,12 @@
>  #define GIT_WINDOWS_NATIVE
>  #endif
>  
> +#ifndef NO_INTTYPES_H
> +#include <inttypes.h>
> +#else
> +#include <stdint.h>
> +#endif
> +
>  #include <unistd.h>
>  #include <stdio.h>
>  #include <sys/stat.h>
> @@ -147,11 +153,6 @@
>  #include <netdb.h>
>  #include <pwd.h>
>  #include <sys/un.h>
> -#ifndef NO_INTTYPES_H
> -#include <inttypes.h>
> -#else
> -#include <stdint.h>
> -#endif
>  #ifdef NO_INTPTR_T
>  /*
>   * On I16LP32, ILP32 and LP64 "long" is the save bet, however
> -- 
> 2.1.1
>
> -- 

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