diff options
Diffstat (limited to 'm4/time_h.m4')
| -rw-r--r-- | m4/time_h.m4 | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/m4/time_h.m4 b/m4/time_h.m4 new file mode 100644 index 0000000..e90ed7a --- /dev/null +++ b/m4/time_h.m4 @@ -0,0 +1,76 @@ +# Configure a more-standard replacement for <time.h>. + +# Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software +# Foundation, Inc. + +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# Written by Paul Eggert and Jim Meyering. + +AC_DEFUN([gl_HEADER_TIME_H], +[ + dnl Use AC_REQUIRE here, so that the default behavior below is expanded + dnl once only, before all statements that occur in other macros. + AC_REQUIRE([gl_HEADER_TIME_H_BODY]) +]) + +AC_DEFUN([gl_HEADER_TIME_H_BODY], +[ + AC_REQUIRE([AC_C_RESTRICT]) + AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) + gl_ABSOLUTE_HEADER([time.h]) + ABSOLUTE_TIME_H=\"$gl_cv_absolute_time_h\" + AC_SUBST([ABSOLUTE_TIME_H]) + AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC]) +]) + +AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS], +[ + dnl If another module says to replace or to not replace, do that. + dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK; + dnl this lets maintainers check for portability. + REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R]) + REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP]) + REPLACE_STRPTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_STRPTIME]) + REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM]) +]) + +dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared +dnl in time.h or sys/time.h. + +AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC], +[ + AC_CHECK_HEADERS_ONCE([sys/time.h]) + AC_CACHE_CHECK([for struct timespec in <time.h>], + [gl_cv_sys_struct_timespec_in_time_h], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[#include <time.h> + ]], + [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], + [gl_cv_sys_struct_timespec_in_time_h=yes], + [gl_cv_sys_struct_timespec_in_time_h=no])]) + + TIME_H_DEFINES_STRUCT_TIMESPEC=0 + SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0 + if test $gl_cv_sys_struct_timespec_in_time_h = yes; then + TIME_H_DEFINES_STRUCT_TIMESPEC=1 + else + AC_CACHE_CHECK([for struct timespec in <sys/time.h>], + [gl_cv_sys_struct_timespec_in_sys_time_h], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[#include <sys/time.h> + ]], + [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], + [gl_cv_sys_struct_timespec_in_sys_time_h=yes], + [gl_cv_sys_struct_timespec_in_sys_time_h=no])]) + if test $gl_cv_sys_struct_timespec_in_time_h = yes; then + SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1 + fi + fi + AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC]) + AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC]) +]) |