dnl Process this file with autoconf to produce a configure script.
AC_INIT(ruby.h)

PROGS="ruby"
AC_SUBST(PROGS)dnl

dnl Checks for programs.
AC_PROG_CC
AC_PROG_GCC_TRADITIONAL
AC_PROG_YACC
AC_PROG_INSTALL
AC_PROG_MAKE_SET

dnl Checks for libraries.
AC_CHECK_LIB(m, pow)
AC_CHECK_LIB(crypt, crypt)
AC_CHECK_LIB(dl, dlopen, [:])

dnl Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h limits.h sys/file.h sys/ioctl.h sys/time.h unistd.h\
		stdlib.h syscall.h a.out.h string.h utime.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_UID_T
AC_TYPE_SIZE_T
AC_STRUCT_ST_BLKSIZE
AC_STRUCT_ST_BLOCKS
AC_STRUCT_ST_RDEV

dnl Checks for library functions.
AC_TYPE_GETGROUPS
AC_TYPE_SIGNAL
AC_FUNC_ALLOCA
AC_FUNC_VFORK
AC_REPLACE_FUNCS(memmove mkdir strerror strftime\
		 strstr strtoul strdup)
AC_CHECK_FUNCS(fmod killpg random wait4 waitpid syscall getcwd\
	      setruid seteuid setreuid setrgid setegid setregid\
	      getpriority sigprocmask dlopen utimes)
AC_CHECK_FUNC(setenv, [], AC_CHECK_FUNCS(putenv))
if test "$ac_cv_func strftime" = no; then
    AC_STRUCT_TIMEZONE
    AC_TRY_LINK([],
	 [extern int daylight; int i = daylight;], AC_DEFINE(HAVE_DAYLIGHT))
fi

AC_C_BIGENDIAN
AC_MSG_CHECKING(std stdio)
AC_CACHE_VAL(rb_cv_stdstdio,
[AC_TRY_COMPILE([#include <stdio.h>], 
	        [stdin->_cnt > 0;], 
	        rb_cv_stdstdio=yes,
	        rb_cv_stdstdio=no)])
AC_MSG_RESULT($rb_cv_stdstdio)
if test "$rb_cv_stdstdio" = yes; then
  AC_DEFINE(STDSTDIO)
fi
AC_MSG_CHECKING(struct passwd)
AC_EGREP_HEADER(pw_change, pwd.h, AC_DEFINE(PW_CHANGE))
AC_EGREP_HEADER(pw_quota, pwd.h, AC_DEFINE(PW_QUOTA))
AC_EGREP_HEADER(pw_age, pwd.h, AC_DEFINE(PW_AGE))
AC_EGREP_HEADER(pw_class, pwd.h, AC_DEFINE(PW_CLASS))
AC_EGREP_HEADER(pw_comment, pwd.h, AC_DEFINE(PW_COMMENT))
AC_EGREP_HEADER(pw_expire, pwd.h, AC_DEFINE(PW_EXPIRE))
AC_MSG_RESULT(done)

if test "$ac_cv_header_a_out_h" = yes; then
 AC_MSG_CHECKING(whether matz's dln works)
 cp confdefs.h config.h
 AC_CACHE_VAL(rb_cv_mydln,
 [AC_TRY_COMPILE([
#define USE_MY_DLN
#include "dln.c"
],
	        [], 
	        rb_cv_mydln=yes,
	        rb_cv_mydln=no)])
 AC_MSG_RESULT($rb_cv_mydln)
 if test "$rb_cv_mydln" = yes; then
   AC_DEFINE(USE_MY_DLN)
 fi
fi

AC_SUBST(STATIC)dnl
AC_SUBST(CCDLFLAGS)dnl
AC_SUBST(LDDLFLAGS)dnl
AC_SUBST(DLEXT)dnl
AC_SUBST(EXTMAKE)dnl

EXTMAKE=
STATIC=

if test "$rb_cv_mydln" = yes; then
  EXTMAKE=extmake
  if test "$HOSTTYPE" = sparc; then
    if test "$ac_cv_prog_CC" = gcc; then
      STATIC=-static
    else
      STATIC=-Bstatic
    fi
  fi
  DLEXT=o
  AC_DEFINE(DLEXT, ".o")
  CCDLFLAGS=
  LDCMD=
elif test "$ac_cv_lib_dl" = yes || test "$ac_cv_func_dlopen" = yes; then
  AC_CANONICAL_HOST
  echo "please mail this value to matz -- $host_os"
  EXTMAKE=extmake
  DLEXT=so
  AC_DEFINE(DLEXT, ".so")
  if test "$ac_cv_prog_CC" = gcc; then
    CCDLFLAGS=-fpic
  else
    case "$host_os" in
	hpux*)		CCDLFLAGS='+z' ;;
	solaris*|irix*)	CCDLFLAGS='-K pic' ;;
	sunos*)		CCDLFLAGS='-pic' ;;
	svr4*|esix*) 	CCDLFLAGS='-Kpic' ;;
	*)		CCDLFLAGS='' ;;
    esac
  fi
  case "$host_os" in
	hpux*)		LDDLFLAGS='-b' ;;
	solaris*) 	LDDLFLAGS='-G' ;;
	sunos*) 	LDDLFLAGS='-assert nodefinitions' ;;
	svr4*|esix*) 	LDDLFLAGS="-G $LDFLAGS" ;;
	*) 		LDDLFLAGS="" ;;
  esac
fi

cp confdefs.h config.h
AC_OUTPUT(Makefile ext/extmk.rb)