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Last change
on this file since 619 was
444,
checked in by satin@…, 7 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.0 KB
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| 1 | dnl Copyright (C) 2015 Free Software Foundation, Inc. |
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| 2 | dnl This file is free software, distributed under the terms of the GNU |
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| 3 | dnl General Public License. As a special exception to the GNU General |
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| 4 | dnl Public License, this file may be distributed as part of a program |
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| 5 | dnl that contains a configuration script generated by Autoconf, under |
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| 6 | dnl the same distribution terms as the rest of that program. |
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| 7 | |
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| 8 | # Define HAVE_BITFIELD_TYPE_MATTERS if the type of bitfields effects their |
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| 9 | # alignment. |
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| 10 | |
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| 11 | AC_DEFUN([gt_BITFIELD_TYPE_MATTERS], |
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| 12 | [ |
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| 13 | AC_CACHE_CHECK([if the type of bitfields matters], gt_cv_bitfield_type_matters, |
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| 14 | [ |
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| 15 | AC_TRY_COMPILE( |
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| 16 | [struct foo1 { char x; char y:1; char z; }; |
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| 17 | struct foo2 { char x; long long int y:1; char z; }; |
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| 18 | int foo1test[ sizeof (struct foo1) < sizeof (struct foo2) ? 1 : -1 ]; ], |
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| 19 | [], gt_cv_bitfield_type_matters=yes, gt_cv_bitfield_type_matters=no) |
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| 20 | ]) |
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| 21 | if test $gt_cv_bitfield_type_matters = yes; then |
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| 22 | AC_DEFINE(HAVE_BITFIELD_TYPE_MATTERS, 1, |
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| 23 | [Define if the type of bitfields effects alignment.]) |
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| 24 | fi |
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| 25 | ]) |
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