diff options
Diffstat (limited to 'gnulib/m4/sys_time_h.m4')
| -rw-r--r-- | gnulib/m4/sys_time_h.m4 | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/gnulib/m4/sys_time_h.m4 b/gnulib/m4/sys_time_h.m4 new file mode 100644 index 0000000..13ac576 --- /dev/null +++ b/gnulib/m4/sys_time_h.m4 @@ -0,0 +1,57 @@ +# Configure a replacement for <sys/time.h>. + +# Copyright (C) 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 Martin Lambers. + +AC_DEFUN([gl_HEADER_SYS_TIME_H], +[ + dnl Use AC_REQUIRE here, so that the REPLACE_GETTIMEOFDAY=0 statement + dnl below is expanded once only, before all REPLACE_GETTIMEOFDAY=1 + dnl statements that occur in other macros. + AC_REQUIRE([gl_HEADER_SYS_TIME_H_BODY]) +]) + +AC_DEFUN([gl_HEADER_SYS_TIME_H_BODY], +[ + AC_REQUIRE([AC_C_RESTRICT]) + gl_CHECK_NEXT_HEADERS([sys/time.h]) + + if test $ac_cv_header_sys_time_h = yes; then + HAVE_SYS_TIME_H=1 + else + HAVE_SYS_TIME_H=0 + fi + AC_SUBST([HAVE_SYS_TIME_H]) + + AC_CACHE_CHECK([for struct timeval], [gl_cv_sys_struct_timeval], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[#if HAVE_SYS_TIME_H + #include <sys/time.h> + #endif + #include <time.h> + ]], + [[static struct timeval x; x.tv_sec = x.tv_usec;]])], + [gl_cv_sys_struct_timeval=yes], + [gl_cv_sys_struct_timeval=no])]) + if test $gl_cv_sys_struct_timeval = yes; then + HAVE_STRUCT_TIMEVAL=1 + else + HAVE_STRUCT_TIMEVAL=0 + fi + AC_SUBST([HAVE_STRUCT_TIMEVAL]) + + dnl Assume POSIX behavior unless another module says otherwise. + REPLACE_GETTIMEOFDAY=0 + AC_SUBST([REPLACE_GETTIMEOFDAY]) + if test $HAVE_SYS_TIME_H = 0 || test $HAVE_STRUCT_TIMEVAL = 0; then + SYS_TIME_H=sys/time.h + else + SYS_TIME_H= + fi + AC_SUBST([SYS_TIME_H]) +]) |