dnl Process this file with autoconf 2.0 or later to make a configure script.
AC_REVISION($Revision$)
AC_PREREQ(2.0)
AC_INIT(Include/object.h)
AC_CONFIG_HEADER(config.h)

# checks for alternative programs
AC_MSG_CHECKING(for --without-gcc)
AC_ARG_WITH(gcc, [--without-gcc             never use gcc], [
	case $withval in
	no)	CC=cc
		without_gcc=yes;;
	yes)	CC=gcc
		without_gcc=no;;
	*)	CC=$withval
		without_gcc=$withval;;
	esac], [without_gcc=no])
AC_MSG_RESULT($without_gcc)

AC_PROG_CC
AC_PROG_RANLIB
AC_SUBST(AR)
AC_CHECK_PROGS(AR, ar aal, ar)
AC_SUBST(INSTALL)
AC_SUBST(INSTALL_PROGRAM)
AC_SUBST(INSTALL_DATA)
# Install just never works :-(
if test -z "$INSTALL"
then
	INSTALL=cp
	INSTALL_PROGRAM=cp
	INSTALL_DATA=cp
else
	INSTALL_PROGRAM="$INSTALL"
	INSTALL_DATA="$INSTALL -m 644"
fi
AC_SUBST(OPT)
# Optimizer/debugger flags passed between Makefiles
if test -z "$OPT"
then OPT=-O
fi

# checks for UNIX variants that set C preprocessor variables
AC_AIX
AC_ISC_POSIX
AC_MINIX

was_it_defined=no
AC_TRY_RUN([
#ifdef _NEXT_SOURCE
main() { exit(0); }
#endif
], AC_DEFINE(_POSIX_SOURCE) was_it_defined=yes)
AC_MSG_CHECKING(for NeXT)
AC_MSG_RESULT($was_it_defined)

# checks for header files
AC_HEADER_STDC
AC_CHECK_HEADERS(dlfcn.h fcntl.h limits.h signal.h stdarg.h stddef.h stdlib.h thread.h unistd.h utime.h sys/audioio.h sys/param.h sys/select.h sys/time.h sys/times.h sys/un.h sys/utsname.h)
AC_HEADER_DIRENT

# checks for typedefs
was_it_defined=no
AC_MSG_CHECKING(for clock_t in time.h)
AC_EGREP_HEADER(clock_t, time.h, was_it_defined=yes, AC_DEFINE(clock_t, long))
AC_MSG_RESULT($was_it_defined)

AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_UID_T

# Set name for machine-dependent library files
AC_SUBST(MACHDEP)
AC_MSG_CHECKING(MACHDEP)
if test -z "$MACHDEP"
then
	ac_sys_system=`uname -s | tr -d ' ' | tr '[[A-Z]]' '[[a-z]]'`
	ac_sys_release=`uname -r | tr -d ' ' | sed 's/\..*//'`
	MACHDEP="$ac_sys_system$ac_sys_release"
	case MACHDEP in
	'')	MACHDEP=unknown;;
	esac
fi
AC_MSG_RESULT($MACHDEP)

# Set info about shared libraries.
# XXX This should try things out instead of testing uname!
AC_SUBST(SO)
AC_SUBST(LDSHARED)
AC_SUBST(CCSHARED)
AC_SUBST(LINKFORSHARED)
ac_sys_system=`uname -s`
ac_sys_release=`uname -r`
# SO is the extension of shared libraries `(including the dot!)
# -- usually .so, .sl on HP-UX
AC_MSG_CHECKING(SO)
if test -z "$SO"
then
	case $ac_sys_system in
	hp*|HP*) SO=.sl;;
	*)	SO=.so;;
	esac
fi
AC_MSG_RESULT($SO)
# LDSHARED is the ld *command* used to create shared library
# -- "ld" on SunOS 4.x.x, "ld -G" on SunOS 5.x, "ld -shared" on IRIX 5
AC_MSG_CHECKING(LDSHARED)
if test -z "$LDSHARED"
then
	case $ac_sys_system/$ac_sys_release in
	IRIX*) LDSHARED="ld -shared";;
	SunOS/4*) LDSHARED="ld";;
	SunOS/5*) LDSHARED="ld -G";;
	hp*|HP*) LDSHARED="ld -b";;
	DYNIX/ptx*) LDSHARED="ld -G";;
	*)	LDSHARED="ld";;
	esac
fi
AC_MSG_RESULT($LDSHARED)
# CCSHARED are the C *flags* used to create objects to go into a shared
# library -- this is only needed for HP-UX
AC_MSG_CHECKING(CCSHARED)
if test -z "$CCSHARED"
then
	case $ac_sys_system in
	hp*|HP*) CCSHARED="+z";;
	esac
fi
AC_MSG_RESULT($CCSHARED)
# LINKFORSHARED are the flags passed to the $(CC) command that links
# the python executable -- this is only needed for HP-UX
AC_MSG_CHECKING(LINKFORSHARED)
if test -z "$LINKFORSHARED"
then
	case $ac_sys_system in
	hp*|HP*) LINKFORSHARED="-Wl,-E";;
	esac
fi
AC_MSG_RESULT($LINKFORSHARED)

# checks for libraries
AC_CHECK_LIB(dl, dlopen)	# Dynamic linking for SunOS/Solaris and SYSV
AC_CHECK_LIB(dld, shl_load)	# Dynamic linking for HP-UX
AC_CHECK_LIB(sun, getpwnam)	# NIS (== YP) interface for IRIX 4
AC_CHECK_LIB(nsl, t_open, [LIBS="-lnsl $LIBS"]) # SVR4
AC_CHECK_LIB(inet, gethostbyname, [LIBS="-linet $LIBS"], [], -lnsl) # Sequent
AC_CHECK_LIB(socket, socket, [LIBS="-lsocket $LIBS"], [], $LIBS) # SVR4 sockets

AC_MSG_CHECKING(for --with-readline)
AC_ARG_WITH(readline, [--with-readline=DIRECTORY GNU readline], [
AC_MSG_RESULT($withval)
AC_DEFINE(WITH_READLINE)
if test ! -d "$withval"
then AC_ERROR(proper usage is --with-readline=DIRECTORY)
fi
termcap=
AC_CHECK_LIB(termcap, tgetent, [termcap=termcap], [
AC_CHECK_LIB(termlib, tgetent, [termcap=termlib])])
if test ! -z "$termcap"
then LIBS="$LIBS $withval/libreadline.a"
     # Avoid possible conflict between shared libraries termcap and gl
     # on IRIX 5: both contain a routine called clear.
     if test -f /usr/lib/lib$termcap.a
     then LIBS="$LIBS /usr/lib/lib$termcap.a"
     else LIBS="$LIBS -l$termcap"
     fi
else AC_ERROR(no working termcap/termlib, do not use --with-readline)
fi], AC_MSG_RESULT(no))

AC_MSG_CHECKING(for --with-thread)
AC_ARG_WITH(thread, [--with-thread[=DIRECTORY] make interpreter thread-safe], [
AC_MSG_RESULT($withval)
if test -d "$withval"
then LIBS="$LIBS -L$withval"
fi
AC_CHECK_LIB(pthreads, pthread_create, [AC_DEFINE(WITH_THREAD)
AC_DEFINE(_POSIX_THREADS)
LIBS="$LIBS -lpthreads"
LIBOBJS="$LIBOBJS thread.o"])
AC_CHECK_LIB(mpc, usconfig, [AC_DEFINE(WITH_THREAD)
LIBS="$LIBS -lmpc"
LIBOBJS="$LIBOBJS thread.o"])
AC_CHECK_LIB(thread, thr_create, [AC_DEFINE(WITH_THREAD)
LIBS="$LIBS -lthread"
LIBOBJS="$LIBOBJS thread.o"])
], AC_MSG_RESULT(no))

# -I${DLINCLDIR} is added to the compile rule for import.o
AC_SUBST(DLINCLDIR)
DLINCLDIR=/

AC_MSG_CHECKING(for --with-sgi-dl)
AC_ARG_WITH(sgi-dl, [--with-sgi-dl=DIRECTORY   IRIX 4 dynamic linking], [
AC_MSG_RESULT($withval)
AC_DEFINE(WITH_SGI_DL)
dldir=$withval
if test -d "$dldir"
then LIBS="$LIBS -L$dldir"
else AC_ERROR(proper usage is --with-sgi-dl=DIRECTORY)
fi
DLINCLDIR=${dldir}
LIBS="$LIBS -ldl -lmld"], AC_MSG_RESULT(no))

AC_MSG_CHECKING(for --with-dl-dld)
AC_ARG_WITH(dl-dld, [--with-dl-dld=DL_DIR,DLD_DIR  GNU dynamic linking], [
AC_MSG_RESULT($withval)
AC_DEFINE(WITH_DL_DLD)
dldir=`echo "$withval" | sed 's/,.*//'`
dlddir=`echo "$withval" | sed 's/.*,//'`
if test -d "$dldir" -a -d "$dlddir"
then LIBS="$LIBS -L$dldir -L$dlddir"
else AC_ERROR(proper usage is --with-dl-dld=DL_DIRECTORY,DLD_DIRECTORY)
fi
DLINCLDIR=${dldir}
LIBS="$LIBS -ldl -ldld"], AC_MSG_RESULT(no))

# checks for library functions
AC_CHECK_FUNCS(chown clock dlopen ftime ftruncate gethostname_r gettimeofday getpeername getpgrp getpid getwd link lstat nice readlink select setgid setuid setsid setpgid setpgrp setvbuf siginterrupt symlink tcgetpgrp tcsetpgrp times truncate uname waitpid)
AC_REPLACE_FUNCS(dup2 getcwd strerror memmove)
AC_CHECK_FUNC(getpgrp, AC_TRY_COMPILE([#include <unistd.h>], [getpgrp(0);], AC_DEFINE(GETPGRP_HAVE_ARG)))
AC_CHECK_FUNC(setpgrp, AC_TRY_COMPILE([#include <unistd.h>], [setpgrp(0,0);], AC_DEFINE(SETPGRP_HAVE_ARG)))
AC_CHECK_FUNC(gettimeofday, AC_TRY_COMPILE([#include <sys/time.h>], [gettimeofday((struct timeval*)0,(struct timezone*)0);], ,AC_DEFINE(GETTIMEOFDAY_NO_TZ)))

# checks for structures
AC_HEADER_TIME
AC_STRUCT_TM
AC_STRUCT_TIMEZONE

AC_MSG_CHECKING(for time.h that defines altzone)
AC_CACHE_VAL(ac_cv_header_time_altzone,
[AC_TRY_COMPILE([#include <time.h>], [return altzone;],
  ac_cv_header_time_altzone=yes,
  ac_cv_header_time_altzone=no)])
AC_MSG_RESULT($ac_cv_header_time_altzone)
if test $ac_cv_header_time_altzone = yes; then
  AC_DEFINE(HAVE_ALTZONE)
fi

was_it_defined=no
AC_MSG_CHECKING(whether sys/select.h and sys/time.h may both be included)
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/select.h>
#include <sys/time.h>
], [;], [AC_DEFINE(SYS_SELECT_WITH_SYS_TIME) was_it_defined=yes])
AC_MSG_RESULT($was_it_defined)

# checks for compiler characteristics

AC_C_CHAR_UNSIGNED

AC_C_CONST

works=no
AC_MSG_CHECKING(for working volatile)
AC_TRY_COMPILE([],[volatile int x; x = 0;], works=yes, AC_DEFINE(volatile, []))
AC_MSG_RESULT($works)

works=no
AC_MSG_CHECKING(for working signed char)
AC_TRY_COMPILE([], [signed char c;], works=yes, AC_DEFINE(signed, []))
AC_MSG_RESULT($works)

have_prototypes=no
AC_MSG_CHECKING(for prototypes)
AC_TRY_COMPILE([int foo(int x) { return 0; }], [return foo(10);],
AC_DEFINE(HAVE_PROTOTYPES) have_prototypes=yes)
AC_MSG_RESULT($have_prototypes)

works=no
AC_MSG_CHECKING(for variable length prototypes and stdarg.h)
AC_TRY_COMPILE([
#include <stdarg.h>
int foo(int x, ...) { return 0; }
], [return foo(10, 11, 12);],
AC_DEFINE(HAVE_STDARG_PROTOTYPES) works=yes)
AC_MSG_RESULT($works)

if test "$have_prototypes" = yes; then
bad_prototypes=no
AC_MSG_CHECKING(for bad exec* prototypes)
AC_TRY_COMPILE([#include <unistd.h>], [char **t;execve("@",t,t);], ,
	AC_DEFINE(BAD_EXEC_PROTOTYPES) bad_prototypes=yes)
AC_MSG_RESULT($bad_prototypes)
fi

bad_forward=no
AC_MSG_CHECKING(for bad static forward)
AC_TRY_RUN([
struct s { int a; int b; };
static struct s foo;
int foobar() {
 static int random;
 random = (int) &foo;
 return random;
}
static struct s foo = { 1, 2 };
main() {
 exit(!((int)&foo == foobar()));
}
], , AC_DEFINE(BAD_STATIC_FORWARD) bad_forward=yes)
AC_MSG_RESULT($bad_forward)

va_list_is_array=no
AC_MSG_CHECKING(whether va_list is an array)
AC_TRY_COMPILE([
#ifdef HAVE_STDARG_PROTOTYPES
#include <stdarg.h>
#else
#include <varargs.h>
#endif
], [va_list list1, list2; list1 = list2;], , 
AC_DEFINE(VA_LIST_IS_ARRAY) va_list_is_array=yes)
AC_MSG_RESULT($va_list_is_array)

# checks for system services
# (none yet)

# Linux requires this for correct f.p. operations
AC_CHECK_LIB(ieee, __fpu_control)

# check for --with-libm=...
AC_SUBST(LIBM)
LIBM=-lm
AC_ARG_WITH(libm, [--with-libm=STRING        math library], [
if test "$withval" != yes
then LIBM=$withval
else AC_ERROR(proper usage is --with-libm=STRING)
fi])

# check for --with-libc=...
AC_SUBST(LIBC)
AC_ARG_WITH(libc, [--with-libc=STRING        C library], [
if test "$withval" != yes
then LIBC=$withval
else AC_ERROR(proper usage is --with-libc=STRING)
fi])

# check for hypot() in math library
LIBS_SAVE=$LIBS
LIBS="$LIBS $LIBM"
AC_CHECK_FUNCS(hypot)
LIBS=$LIBS_SAVE

# check for getopt
AC_MSG_CHECKING(for genuine getopt)
AC_CACHE_VAL(ac_cv_func_getopt,
[AC_TRY_RUN([#include <stdio.h>
extern int optind, opterr, getopt();
extern char* optarg;
int main() {
	char* av[] = { "testprog", "parameter", "-fFlag", NULL };
	opterr = 0;
	if (getopt(3, av, "f:") == 'f') { exit(1); }
	exit(0);
}], ac_cv_func_getopt=yes, ac_cv_func_getopt=no, ac_cv_func_getopt=no)])dnl
AC_MSG_RESULT($ac_cv_func_getopt)
test $ac_cv_func_getopt = no && LIBOBJS="$LIBOBJS getopt.o"
AC_SUBST(LIBOBJS)dnl

# generate output files
AC_OUTPUT(Makefile Objects/Makefile Parser/Makefile Python/Makefile Modules/Makefile.pre)
