dnl Process this file with autoconf to produce a configure script.
AC_INIT(engine.c)
AC_ARG_ENABLE(force-reg,
[ --enable-force-reg Use explicit register declarations if they appear in
the machine.h file. This can cause a good speedup,
but also incorrect code with some gcc versions on
some processors (default disabled).],
AC_DEFINE(FORCE_REG))
dnl this is not quite according to the autoconf manual, it causes a replacement
AC_ARG_ENABLE(direct-threaded,
[ --enable-direct-threaded Force direct threading. This may not work on
some machines and may cause slowdown on others.
(default processor-dependent)],
AC_DEFINE(DIRECT_THREADED))
AC_ARG_ENABLE(indirect-threaded,
[ --enable-indirect-threaded Force indirect threading. This can cause a
slowdown on some machines.
(default processor-dependent)],
AC_DEFINE(INDIRECT_THREADED))
#terminology is a bit unusual here: The host is the system on which
#gforth will run; the system on which configure will run is the `build'
AC_CANONICAL_HOST
case "$host_cpu" in
hppa*)
mach_h=hppa
;;
sparc*)
mach_h=sparc
;;
i386|i486|i586)
mach_h=386
#!! direct/indirect threading switch
#!! -m486 flag
;;
m68*)
mach_h=m68k
;;
mips*)
mach_h=mips
#!! link text and data segment into the same 256M region!
#!! does cacheflush work on OSs other than Ultrix?
;;
*)
echo "No direct threading support for $host_cpu, using indirect threading."
echo "Using a generic 32-bit machine description. It will only work if char * AND"
echo "long values have 32 bits."
echo "I'll assume that C floats and doubles are represented by IEEE single and"
echo "double numbers. If this is not so, SF@ etc. will not work correctly."
mach_h=32bit
esac
dnl Now a little support for DOS/DJGCC
AC_SUBST(MAKE_EXE)
MAKE_EXE=""
dnl copy commands for systems that don't have links
AC_SUBST(LINK_KERNL32L)
LINK_KERNL32L=""
AC_SUBST(LINK_KERNL32B)
LINK_KERNL32B=""
#if test $host_os=dos
#then
# echo Configuring for DOS!!!
# MAKE_EXE="coff2exe gforth"
# LINK_KERNL32L='$(CP) kernl32l.fi gforth.fi'
#fi
dnl the following macro produces a warning with autoconf-2.1
AC_C_BIGENDIAN
dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
if test $ac_cv_c_bigendian = yes; then
bytesex=b
else
bytesex=l
fi
dnl Checks for programs.
AC_PROG_LN_S
AC_PROG_INSTALL
dnl Checks for library functions
dnl This check is just for making later checks link with libm.
dnl using sin here is no good idea since it is built-into gcc and typechecked
AC_CHECK_LIB(m,asin)
AC_FUNC_MEMCMP
AC_REPLACE_FUNCS(memmove strtoul)
AC_CHECK_FUNC(getopt_long,getop_long="",getopt_long="getopt.o getopt1.o")
AC_SUBST(getopt_long)
AC_CHECK_FUNCS(rint expm1 log1p)
AC_REPLACE_FUNCS(ecvt)
dnl No check for select, because our replacement is no good under
dnl anything but DOS
dnl autoconf requires (implicitly) that AC_LINK_FILES is used only once
AC_LINK_FILES(${mach_h}.h kernl32${bytesex}.fi,machine.h gforth.fi)
AC_OUTPUT(Makefile)
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