HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 49114fd4 LC |
1 | # Configure a replacement for <sys/time.h>. |
| 2 | # serial 6 | |
| 3 | ||
| 4 | # Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc. | |
| 5 | # This file is free software; the Free Software Foundation | |
| 6 | # gives unlimited permission to copy and/or distribute it, | |
| 7 | # with or without modifications, as long as this notice is preserved. | |
| 8 | ||
| 9 | # Written by Paul Eggert and Martin Lambers. | |
| 10 | ||
| 11 | AC_DEFUN([gl_HEADER_SYS_TIME_H], | |
| 12 | [ | |
| 13 | dnl Use AC_REQUIRE here, so that the REPLACE_GETTIMEOFDAY=0 statement | |
| 14 | dnl below is expanded once only, before all REPLACE_GETTIMEOFDAY=1 | |
| 15 | dnl statements that occur in other macros. | |
| 16 | AC_REQUIRE([gl_HEADER_SYS_TIME_H_BODY]) | |
| 17 | ]) | |
| 18 | ||
| 19 | AC_DEFUN([gl_HEADER_SYS_TIME_H_BODY], | |
| 20 | [ | |
| 21 | AC_REQUIRE([AC_C_RESTRICT]) | |
| 22 | AC_REQUIRE([gl_HEADER_SYS_TIME_H_DEFAULTS]) | |
| 23 | AC_CHECK_HEADERS_ONCE([sys/time.h]) | |
| 24 | gl_CHECK_NEXT_HEADERS([sys/time.h]) | |
| 25 | ||
| 26 | if test $ac_cv_header_sys_time_h != yes; then | |
| 27 | HAVE_SYS_TIME_H=0 | |
| 28 | fi | |
| 29 | ||
| 30 | AC_CACHE_CHECK([for struct timeval], [gl_cv_sys_struct_timeval], | |
| 31 | [AC_COMPILE_IFELSE( | |
| 32 | [AC_LANG_PROGRAM( | |
| 33 | [[#if HAVE_SYS_TIME_H | |
| 34 | #include <sys/time.h> | |
| 35 | #endif | |
| 36 | #include <time.h> | |
| 37 | ]], | |
| 38 | [[static struct timeval x; x.tv_sec = x.tv_usec;]])], | |
| 39 | [gl_cv_sys_struct_timeval=yes], | |
| 40 | [gl_cv_sys_struct_timeval=no])]) | |
| 41 | if test $gl_cv_sys_struct_timeval != yes; then | |
| 42 | HAVE_STRUCT_TIMEVAL=0 | |
| 43 | fi | |
| 44 | ||
| 45 | dnl Check for declarations of anything we want to poison if the | |
| 46 | dnl corresponding gnulib module is not in use. | |
| 47 | gl_WARN_ON_USE_PREPARE([[ | |
| 48 | #if HAVE_SYS_TIME_H | |
| 49 | # include <sys/time.h> | |
| 50 | #endif | |
| 51 | #include <time.h> | |
| 52 | ]], [gettimeofday]) | |
| 53 | ]) | |
| 54 | ||
| 55 | AC_DEFUN([gl_SYS_TIME_MODULE_INDICATOR], | |
| 56 | [ | |
| 57 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. | |
| 58 | AC_REQUIRE([gl_HEADER_SYS_TIME_H_DEFAULTS]) | |
| 59 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) | |
| 60 | dnl Define it also as a C macro, for the benefit of the unit tests. | |
| 61 | gl_MODULE_INDICATOR_FOR_TESTS([$1]) | |
| 62 | ]) | |
| 63 | ||
| 64 | AC_DEFUN([gl_HEADER_SYS_TIME_H_DEFAULTS], | |
| 65 | [ | |
| 66 | GNULIB_GETTIMEOFDAY=0; AC_SUBST([GNULIB_GETTIMEOFDAY]) | |
| 67 | dnl Assume POSIX behavior unless another module says otherwise. | |
| 68 | HAVE_GETTIMEOFDAY=1; AC_SUBST([HAVE_GETTIMEOFDAY]) | |
| 69 | HAVE_STRUCT_TIMEVAL=1; AC_SUBST([HAVE_STRUCT_TIMEVAL]) | |
| 70 | HAVE_SYS_TIME_H=1; AC_SUBST([HAVE_SYS_TIME_H]) | |
| 71 | REPLACE_GETTIMEOFDAY=0; AC_SUBST([REPLACE_GETTIMEOFDAY]) | |
| 72 | ]) |