projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 9c9d63b1 | 1 | # serial 28 |
| 4a626d0a | 2 | |
| 9c9d63b1 | 3 | # Copyright (C) 2001-2003, 2005, 2007, 2009-2021 Free Software Foundation, Inc. |
| 4a626d0a PA |
4 | # This file is free software; the Free Software Foundation |
| 5 | # gives unlimited permission to copy and/or distribute it, | |
| 6 | # with or without modifications, as long as this notice is preserved. | |
| 7 | ||
| 8 | dnl From Jim Meyering. | |
| 9 | ||
| 10 | AC_DEFUN([gl_FUNC_GETTIMEOFDAY], | |
| 11 | [ | |
| c0c3707f | 12 | AC_REQUIRE([gl_HEADER_SYS_TIME_H_DEFAULTS]) |
| 4a626d0a | 13 | AC_REQUIRE([AC_C_RESTRICT]) |
| c0c3707f | 14 | AC_REQUIRE([AC_CANONICAL_HOST]) |
| 4a626d0a | 15 | AC_REQUIRE([gl_HEADER_SYS_TIME_H]) |
| 4a626d0a PA |
16 | AC_CHECK_FUNCS_ONCE([gettimeofday]) |
| 17 | ||
| 18 | gl_gettimeofday_timezone=void | |
| 19 | if test $ac_cv_func_gettimeofday != yes; then | |
| 20 | HAVE_GETTIMEOFDAY=0 | |
| 21 | else | |
| 4a626d0a PA |
22 | AC_CACHE_CHECK([for gettimeofday with POSIX signature], |
| 23 | [gl_cv_func_gettimeofday_posix_signature], | |
| 24 | [AC_COMPILE_IFELSE( | |
| 25 | [AC_LANG_PROGRAM( | |
| 26 | [[#include <sys/time.h> | |
| 27 | struct timeval c; | |
| 28 | int gettimeofday (struct timeval *restrict, void *restrict); | |
| 29 | ]], | |
| 30 | [[/* glibc uses struct timezone * rather than the POSIX void * | |
| 31 | if _GNU_SOURCE is defined. However, since the only portable | |
| 32 | use of gettimeofday uses NULL as the second parameter, and | |
| 33 | since the glibc definition is actually more typesafe, it is | |
| 34 | not worth wrapping this to get a compliant signature. */ | |
| 35 | int (*f) (struct timeval *restrict, void *restrict) | |
| 36 | = gettimeofday; | |
| 37 | int x = f (&c, 0); | |
| 38 | return !(x | c.tv_sec | c.tv_usec); | |
| 39 | ]])], | |
| 40 | [gl_cv_func_gettimeofday_posix_signature=yes], | |
| 41 | [AC_COMPILE_IFELSE( | |
| 42 | [AC_LANG_PROGRAM( | |
| 43 | [[#include <sys/time.h> | |
| 44 | int gettimeofday (struct timeval *restrict, struct timezone *restrict); | |
| 45 | ]])], | |
| 46 | [gl_cv_func_gettimeofday_posix_signature=almost], | |
| 47 | [gl_cv_func_gettimeofday_posix_signature=no])])]) | |
| 48 | if test $gl_cv_func_gettimeofday_posix_signature = almost; then | |
| 49 | gl_gettimeofday_timezone='struct timezone' | |
| 50 | elif test $gl_cv_func_gettimeofday_posix_signature != yes; then | |
| 51 | REPLACE_GETTIMEOFDAY=1 | |
| 52 | fi | |
| 53 | dnl If we override 'struct timeval', we also have to override gettimeofday. | |
| 54 | if test $REPLACE_STRUCT_TIMEVAL = 1; then | |
| 55 | REPLACE_GETTIMEOFDAY=1 | |
| 56 | fi | |
| c0c3707f CB |
57 | dnl On mingw, the original gettimeofday has only a precision of 15.6 |
| 58 | dnl milliseconds. So override it. | |
| 59 | case "$host_os" in | |
| 60 | mingw*) REPLACE_GETTIMEOFDAY=1 ;; | |
| 61 | esac | |
| 4a626d0a PA |
62 | fi |
| 63 | AC_DEFINE_UNQUOTED([GETTIMEOFDAY_TIMEZONE], [$gl_gettimeofday_timezone], | |
| 64 | [Define this to 'void' or 'struct timezone' to match the system's | |
| 65 | declaration of the second argument to gettimeofday.]) | |
| 66 | ]) | |
| 67 | ||
| 4a626d0a | 68 | # Prerequisites of lib/gettimeofday.c. |
| c0c3707f | 69 | AC_DEFUN([gl_PREREQ_GETTIMEOFDAY], [:]) |