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[bug #52642] Newer MSVC has <stdint.h>

From: Simon Richter
Subject: [bug #52642] Newer MSVC has <stdint.h>
Date: Mon, 11 Dec 2017 14:44:40 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0


                 Summary: Newer MSVC has <stdint.h>
                 Project: make
            Submitted by: geier
            Submitted on: Mon 11 Dec 2017 08:44:38 PM CET
                Severity: 3 - Normal
              Item Group: Build/Install
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.2.1
        Operating System: None
           Fixed Release: None
           Triage Status: None



When building with ARM64-targetted MSVC from Visual Studio 2017, build fails

    ...\stdint.h(45): warning C4114: same type qualifier used more than once
    ...\stdint.h(45): error C2632: '__int64' followed by 'long' is illegal
    ...\stdint.h(45): warning C4091: 'typedef ': ignored on left of 'unsigned
__int64' when no variable is declared

The problem is in config.h:

    #define uintmax_t unsigned long

which is active for Windows because neither <stdint.h> nor <inttypes.h> is
expected to exist.

MSVC has has <stdint.h> for a few releases now, so it would probably make
sense to assume HAVE_STDINT_H when _MSC_VER >= 1600 (Visual Studio 2010).


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