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Define __STDC_WANT_IEC_60559_TYPES_EXT__ before including other headers (#5356)

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Some standard headers might implicitly include `float.h`. If that happens
before `__STDC_WANT_IEC_60559_TYPES_EXT__` is defined, the macros that
are needed for the `_Float16` data type (like `FLT16_MAX`) might not be
defined.

That is happening with mingw-w64 headers since the following change: https://github.com/mingw-w64/mingw-w64/commit/b40b6a021dcb6c2396e248e22f682b7bd2599d7a

Define `__STDC_WANT_IEC_60559_TYPES_EXT__` before including other headers
in `H5private.h` to make that scenario less likely.
This commit is contained in:
Markus Mützel
2025-03-07 12:48:46 -06:00
committed by GitHub
parent 3448276452
commit b09008ea03
1 changed files with 5 additions and 2 deletions
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src/H5private.h
+5 -2
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@@ -20,6 +20,11 @@
#ifndef H5private_H
#define H5private_H
/* Define __STDC_WANT_IEC_60559_TYPES_EXT__ for _FloatN support, if available.
* Do that before including any other headers in case they include <float.h>
* implicitly. */
#define __STDC_WANT_IEC_60559_TYPES_EXT__
#include "H5public.h" /* Include Public Definitions */
#include <assert.h>
@@ -34,8 +39,6 @@
#include <string.h>
#include <time.h>
/* Define __STDC_WANT_IEC_60559_TYPES_EXT__ for _FloatN support, if available */
#define __STDC_WANT_IEC_60559_TYPES_EXT__
#include <float.h>
#include <math.h>