libgfortran/acinclude.m4

   1 dnl Check:
   2 dnl * If we have gettimeofday;
   3 dnl * If we have struct timezone for use in calling it;
   4 dnl * If calling it with a timezone pointer actually works -- this is deemed
   5 dnl   obsolete or undefined on some systems which say you should use a null
   6 dnl   pointer -- and undefine HAVE_TIMEZONE if so;
   7 dnl * Whether it only takes one arg.
   8 AC_DEFUN([LIBGFOR_GETTIMEOFDAY], [
   9   AC_CHECK_FUNCS(gettimeofday)
  10   if test "$ac_cv_func_gettimeofday" = yes; then
  11     AC_CACHE_CHECK([for struct timezone], gfor_cv_struct_timezone,
  12       [AC_TRY_COMPILE([#include <sys/time.h>],
  13       [struct timezone tz;],
  14       gfor_cv_struct_timezone=yes, gfor_cv_struct_timezone=no)])
  15     if test $gfor_cv_struct_timezone = yes; then
  16       dnl It may be that we can't call gettimeofday with a non-null pointer.
  17       dnl In that case we'll lie about struct timezone.
  18       AC_TRY_RUN([
  19 #ifdef TIME_WITH_SYS_TIME
  20 #include <sys/time.h>
  21 #include <time.h>
  22 #else
  23 #ifdef HAVE_SYS_TIME_H
  24 #include <sys/time.h>
  25 #else
  26 #include <time.h>
  27 #endif
  28 #endif
  29 main ()
  30 {
  31   struct timeval time;
  32   struct timezone dummy;
  33   if (gettimeofday (&time, &dummy))
  34     exit (1);
  35   else
  36     exit (0);
  37 }],
  38         [gfor_have_struct_timezone=yes], [gfor_have_struct_timezone=no],
  39         [gfor_have_struct_timezone=yes])
  40       if test $gfor_have_struct_timezone = yes; then
  41         AC_DEFINE(HAVE_TIMEZONE, 1, [Do we have struct timezone])
  42       fi
  43     fi
  44     AC_REQUIRE([AC_HEADER_TIME])
  45     AC_CACHE_CHECK([whether gettimeofday can accept two arguments],
  46       emacs_cv_gettimeofday_two_arguments,
  47       [AC_TRY_LINK([
  48 #ifdef TIME_WITH_SYS_TIME
  49 #include <sys/time.h>
  50 #include <time.h>
  51 #else
  52 #ifdef HAVE_SYS_TIME_H
  53 #include <sys/time.h>
  54 #else
  55 #include <time.h>
  56 #endif
  57 #endif
  58       ],
  59       [
  60       struct timeval time;
  61 #ifdef HAVE_TIMEZONE
  62       struct timezone dummy;
  63 #define DUMMY &dummy
  64 #else
  65 #define DUMMY NULL
  66 #endif
  67       gettimeofday (&time, DUMMY);],
  68       emacs_cv_gettimeofday_two_arguments=yes,
  69       emacs_cv_gettimeofday_two_arguments=no)])
  70     if test $emacs_cv_gettimeofday_two_arguments = no; then
  71       AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT, 1,
  72         [Does gettimeofday take a single argument])
  73     fi
  74   fi])
  75
  76 sinclude(../libtool.m4)
  77 dnl The lines below arrange for aclocal not to bring an installed
  78 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
  79 dnl add a definition of LIBTOOL to Makefile.in.
  80 ifelse(,,,[AC_SUBST(LIBTOOL)
  81 AC_DEFUN([AM_PROG_LIBTOOL])
  82 AC_DEFUN([AC_LIBTOOL_DLOPEN])
  83 AC_DEFUN([AC_PROG_LD])
  84 ])
  85