projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 49e4877c PA |
1 | dnl Check whether limits.h has needed features. |
| 2 | ||
| c0c3707f | 3 | dnl Copyright 2016-2019 Free Software Foundation, Inc. |
| 49e4877c PA |
4 | dnl This file is free software; the Free Software Foundation |
| 5 | dnl gives unlimited permission to copy and/or distribute it, | |
| 6 | dnl with or without modifications, as long as this notice is preserved. | |
| 7 | ||
| 8 | dnl From Paul Eggert. | |
| 9 | ||
| 10 | AC_DEFUN_ONCE([gl_LIMITS_H], | |
| 11 | [ | |
| 12 | gl_CHECK_NEXT_HEADERS([limits.h]) | |
| 13 | ||
| c0c3707f | 14 | AC_CACHE_CHECK([whether limits.h has LLONG_MAX, WORD_BIT, ULLONG_WIDTH etc.], |
| 49e4877c PA |
15 | [gl_cv_header_limits_width], |
| 16 | [AC_COMPILE_IFELSE( | |
| c0c3707f CB |
17 | [AC_LANG_PROGRAM( |
| 18 | [[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__ | |
| 19 | #define __STDC_WANT_IEC_60559_BFP_EXT__ 1 | |
| 20 | #endif | |
| 21 | #include <limits.h> | |
| 22 | long long llm = LLONG_MAX; | |
| 23 | int wb = WORD_BIT; | |
| 24 | int ullw = ULLONG_WIDTH; | |
| 25 | ]])], | |
| 49e4877c PA |
26 | [gl_cv_header_limits_width=yes], |
| 27 | [gl_cv_header_limits_width=no])]) | |
| 28 | if test "$gl_cv_header_limits_width" = yes; then | |
| 29 | LIMITS_H= | |
| 30 | else | |
| 31 | LIMITS_H=limits.h | |
| 32 | fi | |
| 33 | AC_SUBST([LIMITS_H]) | |
| 34 | AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"]) | |
| 35 | ]) | |
| c0c3707f CB |
36 | |
| 37 | dnl Unconditionally enables the replacement of <limits.h>. | |
| 38 | AC_DEFUN([gl_REPLACE_LIMITS_H], | |
| 39 | [ | |
| 40 | AC_REQUIRE([gl_LIMITS_H]) | |
| 41 | LIMITS_H='limits.h' | |
| 42 | AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"]) | |
| 43 | ]) |