Squash my changes on branch `fprintf-experiment` into one commit for

reapplication to my new warnings branch, `warnings-again`.  These
changes are included:

commit 915551b7bf64e777dd2007386ec77b1d117770da
Merge: 63858c2 a8892bb
Author: David Young <dyoung@hdfgroup.org>
Date:   Mon Nov 25 17:39:49 2019 -0600

    Merge remote-tracking branch 'hdf5/develop' into fprintf-experiment

commit a8892bb42d6f6e4fbc30fae0eb2b957f81c938b9
Merge: 5c911d8 f907b51
Author: David Young <dyoung@hdfgroup.org>
Date:   Mon Nov 25 17:33:54 2019 -0600

    Merge pull request #2055 in HDFFV/hdf5 from ~DYOUNG/vchoi_fork:add-werror-and-squash-some to develop

    * commit 'f907b511d06612dafc7814a7c30f2f3d2b76d52b':
      Oops, remove more C99 designated initializers for VS 2010 compatibility.

commit 63858c22e168acaec0af8ced6641f26102cc6bb0
Merge: 20ae787 5c911d8
Author: David Young <dyoung@hdfgroup.org>
Date:   Mon Nov 25 17:04:42 2019 -0600

    Merge remote-tracking branch 'hdf5/develop' into fprintf-experiment

commit 5c911d8baf3ee7fe654269088eebdf07f59a8192
Merge: b8a5671 62208b0
Author: David Young <dyoung@hdfgroup.org>
Date:   Mon Nov 25 16:58:27 2019 -0600

    Merge pull request #2030 in HDFFV/hdf5 from ~DYOUNG/vchoi_fork:add-werror-and-squash-some to develop

    * commit '62208b056a09c01855fbac7f75146be58ad6bfe5': (44 commits)
      Add an #include to get a function declaration.
      Don't use C99 designated initializers, they're not compatible with Visual Studio 2010.
      Quiet some more maybe-uninitialized warnings---each is a false positive, *sigh*.  This is more code that may not compile with VS2010, *sigh sigh*.
      Always warn on maybe-uninitialized.  -Wincompatible-pointer-types was not available until GCC 5, so enable it only if that's the GCC version we're using.
      Only promote maybe-uninitialized warnings to errors on GCC 8.  Even on GCC 8, there may be false positives at low optimization levels?  I need to check.
      Only use -Werror=cast-function-type with GCC 8 and later.
      Put all of the -W options back into the order I found them in so that it's easier to compare old and new config/gnu-flags.
      Add new source files to CMakeLists.txt.
      Mention the -Werror= flags in libhdf5.settings.in.
      free -> HDfree
      Promote decleration-after-statement warnings to errors.
      Quiet decleration-after-statement warnings.
      Move a statement under some declarations since some vintages of Visual Studio don't like declarations after statements.
      Document H5D__chunk_mem_xfree_wrapper().
      Undo accidental test deletion.
      Oops, delete a debug printf that snuck in here.
      Undo my changes to the HD macros, hadn't really intended those to be on this branch....
      Make errors of some more warnings.  Move disabled warnings to DEVELOPER_WARNING_CFLAGS.  Put just one warning option on a line, and sort some of the options.
      Cast to the parameter type, H5VL_token_t *, instead of to unsigned char *.
      Change hdset_reg_ref_t and H5R_ref_t from arrays of unsigned char to structs containing those arrays.  Encapsulating the arrays in this way makes it easier to write and think about pointers to these types, casts to/from these types, etc.
      ...

commit 20ae7877e33931b95e8c3502b027d6c3fe94a11f
Merge: 46f8c61 edd5297
Author: David Young <dyoung@hdfgroup.org>
Date:   Fri Nov 22 15:34:09 2019 -0600

    Merge remote-tracking branch 'origin/add-werror-and-squash-some' into fprintf-experiment

commit 46f8c613d5117a8be5bc8385a072daa0b4262f06
Author: David Young <dyoung@hdfgroup.org>
Date:   Fri Nov 22 15:29:00 2019 -0600

    GCC really wants us to use `ll` to format `long long`, so try to make that work
    before any other format modifier.  Seems like we're not compiling the autoconf
    test program with -Werror=format ?  Probably should.

commit eee35b8ef3759c391327cd48a9b3c56b6f8abc99
Author: David Young <dyoung@hdfgroup.org>
Date:   Fri Nov 22 15:28:05 2019 -0600

    It's hard to know just how wide an HDoff_t will be, and I don't think POSIX or
    C standards provide a PRI macro for it, so cast to intmax_t and format using
    PRIdMAX.

commit 86eab12df7a89b546a38e99f8178dd2adbcb3433
Author: David Young <dyoung@hdfgroup.org>
Date:   Fri Nov 22 15:26:25 2019 -0600

    URemove some casts.se the right format string for the argument.  Here and there
    stop casting a printf argument.

commit f722f7cbecbaa99449941484b014426f62f1bed5
Merge: 58e3743 6d5ec83
Author: David Young <dyoung@hdfgroup.org>
Date:   Fri Nov 22 14:44:16 2019 -0600

    Merge branch 'add-werror-and-squash-some' into fprintf-experiment

commit 58e3743b7faa9836606ee91798fe80dfc0040da7
Author: David Young <dyoung@hdfgroup.org>
Date:   Wed Nov 20 21:07:21 2019 -0600

    Remove custom HDfprintf implementation, using the standard library's,
    instead.  Take a swipe at repairing fprintf format strings, mainly
    replacing "%Hu" with "%" PRIuHSIZE, "%a" with "%" PRIuHADDR, "%Zu" with
    "%zu".

    Here and there remove an awkward cast of a printf argument to `long
    long` and use PRI[doux]8, PRI[doux]32, or PRI[doux]64, instead.

    Change occurrences of "%t" to "%s" and perform a suitable change of
    argument, `cond` -> `cond ? "TRUE" : "FALSE"`.

    Some occurrences of %Hu, %a, and %t remain, they just weren't flagged by
    the compiler because of #ifdef'age.

commit d4366909293fa970c23512ac80e5d865d76cddbf
Author: David Young <dyoung@hdfgroup.org>
Date:   Wed Nov 20 20:54:32 2019 -0600

    Promote format-string warnigns to errors.

1 files changed, 67 insertions, 57 deletions

diff --git a/src/H5public.h b/src/H5public.h
index 93cb2ea..68f6e02 100644
--- a/src/H5public.h
+++ b/src/H5public.h
@@ -177,42 +177,82 @@ typedef long long ssize_t;
 #endif
 #endif
 
+/* int64_t type is used for creation order field for links.  It may be
+ * defined in Posix.1g, otherwise it is defined here.
+ */
+#if H5_SIZEOF_INT64_T>=8
+#elif H5_SIZEOF_INT>=8
+    typedef int int64_t;
+#   undef H5_SIZEOF_INT64_T
+#   define H5_SIZEOF_INT64_T H5_SIZEOF_INT
+#elif H5_SIZEOF_LONG>=8
+    typedef long int64_t;
+#   undef H5_SIZEOF_INT64_T
+#   define H5_SIZEOF_INT64_T H5_SIZEOF_LONG
+#elif H5_SIZEOF_LONG_LONG>=8
+    typedef long long int64_t;
+#   undef H5_SIZEOF_INT64_T
+#   define H5_SIZEOF_INT64_T H5_SIZEOF_LONG_LONG
+#else
+#   error "nothing appropriate for int64_t"
+#endif
+
+/* uint64_t type is used for fields for H5O_info_t.  It may be
+ * defined in Posix.1g, otherwise it is defined here.
+ */
+#if H5_SIZEOF_UINT64_T>=8
+#elif H5_SIZEOF_INT>=8
+    typedef unsigned uint64_t;
+#   undef H5_SIZEOF_UINT64_T
+#   define H5_SIZEOF_UINT64_T H5_SIZEOF_INT
+#elif H5_SIZEOF_LONG>=8
+    typedef unsigned long uint64_t;
+#   undef H5_SIZEOF_UINT64_T
+#   define H5_SIZEOF_UINT64_T H5_SIZEOF_LONG
+#elif H5_SIZEOF_LONG_LONG>=8
+    typedef unsigned long long uint64_t;
+#   undef H5_SIZEOF_UINT64_T
+#   define H5_SIZEOF_UINT64_T H5_SIZEOF_LONG_LONG
+#else
+#   error "nothing appropriate for uint64_t"
+#endif
+
 /*
  * The sizes of file objects have their own types defined here, use a 64-bit
  * type.
  */
-#if H5_SIZEOF_LONG_LONG >= 8
-H5_GCC_DIAG_OFF(long-long)
-typedef unsigned long long     hsize_t;
-typedef signed long long    hssize_t;
-H5_GCC_DIAG_ON(long-long)
-#       define H5_SIZEOF_HSIZE_T H5_SIZEOF_LONG_LONG
-#       define H5_SIZEOF_HSSIZE_T H5_SIZEOF_LONG_LONG
-#else
-#   error "nothing appropriate for hsize_t"
-#endif
-#define HSIZE_UNDEF             ((hsize_t)(hssize_t)(-1))
+typedef uint64_t    hsize_t;
+typedef int64_t     hssize_t;
+#define PRIXHSIZE   PRIX64
+#define PRIdHSIZE   PRId64
+#define PRIiHSIZE   PRIi64
+#define PRIoHSIZE   PRIo64
+#define PRIuHSIZE   PRIu64
+#define PRIxHSIZE   PRIx64
+#define H5_SIZEOF_HSIZE_T   H5_SIZEOF_UINT64_T
+#define H5_SIZEOF_HSSIZE_T  H5_SIZEOF_INT64_T
+#define HSIZE_UNDEF         UINT64_MAX
 
 /*
  * File addresses have their own types.
  */
 #if H5_SIZEOF_INT >= 8
     typedef unsigned                haddr_t;
-#   define HADDR_UNDEF              ((haddr_t)(-1))
+#   define HADDR_UNDEF              UINT_MAX
 #   define H5_SIZEOF_HADDR_T        H5_SIZEOF_INT
 #   ifdef H5_HAVE_PARALLEL
 #       define HADDR_AS_MPI_TYPE    MPI_UNSIGNED
 #   endif  /* H5_HAVE_PARALLEL */
 #elif H5_SIZEOF_LONG >= 8
     typedef unsigned long           haddr_t;
-#   define HADDR_UNDEF              ((haddr_t)(long)(-1))
+#   define HADDR_UNDEF              ULONG_MAX
 #   define H5_SIZEOF_HADDR_T        H5_SIZEOF_LONG
 #   ifdef H5_HAVE_PARALLEL
 #       define HADDR_AS_MPI_TYPE    MPI_UNSIGNED_LONG
 #   endif  /* H5_HAVE_PARALLEL */
 #elif H5_SIZEOF_LONG_LONG >= 8
     typedef unsigned long long      haddr_t;
-#   define HADDR_UNDEF              ((haddr_t)(long long)(-1))
+#   define HADDR_UNDEF              ULLONG_MAX
 #   define H5_SIZEOF_HADDR_T        H5_SIZEOF_LONG_LONG
 #   ifdef H5_HAVE_PARALLEL
 #       define HADDR_AS_MPI_TYPE    MPI_LONG_LONG_INT
@@ -221,14 +261,24 @@ H5_GCC_DIAG_ON(long-long)
 #   error "nothing appropriate for haddr_t"
 #endif
 #if H5_SIZEOF_HADDR_T == H5_SIZEOF_INT
-#   define H5_PRINTF_HADDR_FMT  "%u"
+#   define PRIXHADDR  "X"
+#   define PRIoHADDR  "o"
+#   define PRIuHADDR  "u"
+#   define PRIxHADDR  "x"
 #elif H5_SIZEOF_HADDR_T == H5_SIZEOF_LONG
-#   define H5_PRINTF_HADDR_FMT  "%lu"
+#   define PRIXHADDR  "lX"
+#   define PRIoHADDR  "lo"
+#   define PRIuHADDR  "lu"
+#   define PRIxHADDR  "lx"
 #elif H5_SIZEOF_HADDR_T == H5_SIZEOF_LONG_LONG
-#   define H5_PRINTF_HADDR_FMT  "%" H5_PRINTF_LL_WIDTH "u"
+#   define PRIXHADDR  H5_PRINTF_LL_WIDTH "X"
+#   define PRIoHADDR  H5_PRINTF_LL_WIDTH "o"
+#   define PRIuHADDR  H5_PRINTF_LL_WIDTH "u"
+#   define PRIxHADDR  H5_PRINTF_LL_WIDTH "x"
 #else
 #   error "nothing appropriate for H5_PRINTF_HADDR_FMT"
 #endif
+#define H5_PRINTF_HADDR_FMT  "%" PRIuHADDR
 #define HADDR_MAX        (HADDR_UNDEF-1)
 
 /* uint32_t type is used for creation order field for messages.  It may be
@@ -251,46 +301,6 @@ H5_GCC_DIAG_ON(long-long)
 #   error "nothing appropriate for uint32_t"
 #endif
 
-/* int64_t type is used for creation order field for links.  It may be
- * defined in Posix.1g, otherwise it is defined here.
- */
-#if H5_SIZEOF_INT64_T>=8
-#elif H5_SIZEOF_INT>=8
-    typedef int int64_t;
-#   undef H5_SIZEOF_INT64_T
-#   define H5_SIZEOF_INT64_T H5_SIZEOF_INT
-#elif H5_SIZEOF_LONG>=8
-    typedef long int64_t;
-#   undef H5_SIZEOF_INT64_T
-#   define H5_SIZEOF_INT64_T H5_SIZEOF_LONG
-#elif H5_SIZEOF_LONG_LONG>=8
-    typedef long long int64_t;
-#   undef H5_SIZEOF_INT64_T
-#   define H5_SIZEOF_INT64_T H5_SIZEOF_LONG_LONG
-#else
-#   error "nothing appropriate for int64_t"
-#endif
-
-/* uint64_t type is used for fields for H5O_info_t.  It may be
- * defined in Posix.1g, otherwise it is defined here.
- */
-#if H5_SIZEOF_UINT64_T>=8
-#elif H5_SIZEOF_INT>=8
-    typedef unsigned uint64_t;
-#   undef H5_SIZEOF_UINT64_T
-#   define H5_SIZEOF_UINT64_T H5_SIZEOF_INT
-#elif H5_SIZEOF_LONG>=8
-    typedef unsigned long uint64_t;
-#   undef H5_SIZEOF_UINT64_T
-#   define H5_SIZEOF_UINT64_T H5_SIZEOF_LONG
-#elif H5_SIZEOF_LONG_LONG>=8
-    typedef unsigned long long uint64_t;
-#   undef H5_SIZEOF_UINT64_T
-#   define H5_SIZEOF_UINT64_T H5_SIZEOF_LONG_LONG
-#else
-#   error "nothing appropriate for uint64_t"
-#endif
-
 /* Common iteration orders */
 typedef enum {
     H5_ITER_UNKNOWN = -1,       /* Unknown order */