Annotation of gforth/configure.in, revision 1.29

1.1       anton       1: dnl Process this file with autoconf to produce a configure script.
1.20      anton       2: 
                      3: #Copyright (C) 1995,1996 Free Software Foundation, Inc.
                      4: 
                      5: #This file is part of Gforth.
                      6: 
                      7: #Gforth is free software; you can redistribute it and/or
                      8: #modify it under the terms of the GNU General Public License
                      9: #as published by the Free Software Foundation; either version 2
                     10: #of the License, or (at your option) any later version.
                     11: 
                     12: #This program is distributed in the hope that it will be useful,
                     13: #but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.#See the
                     15: #GNU General Public License for more details.
                     16: 
                     17: #You should have received a copy of the GNU General Public License
                     18: #along with this program; if not, write to the Free Software
                     19: #Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
                     20: 
1.1       anton      21: AC_INIT(engine.c)
1.18      anton      22: AC_CONFIG_HEADER(config.h)
1.14      anton      23: 
1.1       anton      24: AC_ARG_ENABLE(force-reg,
                     25: [  --enable-force-reg    Use explicit register declarations if they appear in
                     26:                          the machine.h file. This can cause a good speedup,
                     27:                          but also incorrect code with some gcc versions on
                     28:                          some processors (default disabled).],
                     29: 
                     30: AC_DEFINE(FORCE_REG))
                     31: dnl this is not quite according to the autoconf manual, it causes a replacement
                     32: AC_ARG_ENABLE(direct-threaded,
                     33: [  --enable-direct-threaded    Force direct threading. This may not work on
                     34:                                some machines and may cause slowdown on others.
                     35:                                (default processor-dependent)],
                     36: AC_DEFINE(DIRECT_THREADED))
                     37: AC_ARG_ENABLE(indirect-threaded,
                     38: [  --enable-indirect-threaded  Force indirect threading. This can cause a
                     39:                                slowdown on some machines.
                     40:                                (default processor-dependent)],
                     41: AC_DEFINE(INDIRECT_THREADED))
                     42: 
1.9       pazsan     43: AC_ARG_WITH(debug,
1.10      anton      44: [  --with-debug     specifies option -g to compile with debug info (default)
1.27      anton      45:   --without-debug  omits the -g switch and creates smaller images on
                     46:                    machines where "strip" has problems with gcc style
                     47:                    debugging informations.],
1.9       pazsan     48: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
                     49: 
1.16      anton      50: CFLAGS=$CFLAGS
                     51: 
1.15      pazsan     52: AC_PROG_CC
                     53: 
                     54: if test "$GCC" = "yes"
                     55: then
                     56:    echo "Fine, gcc is available"
                     57: else
                     58:    cat <<'EOF'
1.16      anton      59: Gforth requires GCC-2.0 or higher (it uses GNU C extensions).
                     60: It does not work with other C compilers. Please install the GNU C compiler,
                     61: and try again (or search for a binary distribution for your platform).
1.15      pazsan     62: EOF
                     63:    exit 1
                     64: fi
1.9       pazsan     65: 
1.15      pazsan     66: AC_SUBST(CC)
1.7       anton      67: AC_SUBST(GCCLDFLAGS)
1.9       pazsan     68: AC_SUBST(DEBUGFLAG)
1.7       anton      69: 
1.10      anton      70: dnl the following macro produces a warning with autoconf-2.1
                     71: AC_CHECK_SIZEOF(char *)
                     72: case "$ac_cv_sizeof_char_p" in
                     73:   2)
                     74:     wordsize=16
                     75:     ;;
                     76:   4)
                     77:     wordsize=32
                     78:     ;;
                     79:   8)
                     80:     wordsize=64
                     81:     ;;
                     82: esac
1.9       pazsan     83: 
1.23      pazsan     84: AC_CHECK_SIZEOF(short)
                     85: AC_CHECK_SIZEOF(int)
                     86: AC_CHECK_SIZEOF(long)
                     87: AC_CHECK_SIZEOF(long long)
                     88: 
                     89: ac_cv_int_type_cell=none
                     90: case "$ac_cv_sizeof_char_p" in
                     91:   $ac_cv_sizeof_short)
                     92:     ac_cv_int_type_cell=short
                     93:     ;;
                     94:   $ac_cv_sizeof_int)
                     95:     ac_cv_int_type_cell=int
                     96:     ;;
                     97:   $ac_cv_sizeof_long)
                     98:     ac_cv_int_type_cell=long
                     99:     ;;
                    100:   $ac_cv_sizeof_long_long)
                    101:     ac_cv_int_type_cell="long long"
                    102:     ;;
                    103: esac
1.22      pazsan    104: if test "$ac_cv_int_type_cell" != int; then
1.20      anton     105:        echo "So, sizeof(pointer)!=sizeof(int); looks like a DOS C compiler to me."
                    106:        echo "Since you don't have a proper C on this machine, that's one more reason"
                    107:        echo "to use Forth;-)"
                    108: fi
1.23      pazsan    109: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell)
                    110: 
                    111: ac_cv_int_type_double_cell=none
                    112: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
                    113:   $ac_cv_sizeof_short)
                    114:     ac_cv_int_type_double_cell=short
                    115:     ;;
                    116:   $ac_cv_sizeof_int)
                    117:     ac_cv_int_type_double_cell=int
                    118:     ;;
                    119:   $ac_cv_sizeof_long)
                    120:     ac_cv_int_type_double_cell=long
                    121:     ;;
                    122:   $ac_cv_sizeof_long_long)
                    123:     ac_cv_int_type_double_cell="long long"
                    124:     ;;
                    125: esac
1.21      anton     126: if test "$ac_cv_int_type_double_cell" = none; then
1.20      anton     127:        echo "Emulating double-cell arithmetic. This may be slow."
                    128:        echo "If you find this unacceptable, ask the GCC maintainers to provide proper"
1.23      pazsan    129:        echo 'long longs for your machine (the GCC manual states that they \"are twice as'
                    130:        echo "long as \`long int\'\")."
1.20      anton     131:        LIBOBJS="$LIBOBJS dblsub.o"
                    132:        AC_DEFINE(BUGGY_LONG_LONG)
1.23      pazsan    133: else
                    134:   AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell)
1.20      anton     135: fi
                    136: 
1.1       anton     137: #terminology is a bit unusual here: The host is the system on which
                    138: #gforth will run; the system on which configure will run is the `build'
                    139: AC_CANONICAL_HOST
                    140: case "$host_cpu" in
                    141:        hppa*)
                    142:                mach_h=hppa
1.23      pazsan    143:                LIBOBJS="cache.o"
1.6       pazsan    144:                LDFLAGS="-Xlinker -N"
                    145:                LIBS="-L/lib/pa1.1/"
1.1       anton     146:                ;;
                    147:        sparc*)
                    148:                mach_h=sparc
                    149:                ;;
                    150:        i386|i486|i586)
                    151:                mach_h=386
1.16      anton     152:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
1.1       anton     153:                #!! direct/indirect threading switch
                    154:                #!! -m486 flag
                    155:                ;;
1.26      pazsan    156:         m68k)
                    157:                mach_h=m68k
                    158:                CFLAGS="$CFLAGS -fomit-frame-pointer -traditional-cpp"
                    159:                ;;
1.1       anton     160:        mips*)
                    161:                mach_h=mips
1.7       anton     162:                #link text and data segment into the same 256M region!
                    163:                GCCLDFLAGS="-Xlinker -T -Xlinker 10000000 -Xlinker -D -Xlinker 10400000"
1.1       anton     164:                ;;
1.9       pazsan    165:        alpha*)
                    166:                mach_h=alpha
                    167:                ;;
1.1       anton     168:        *)
                    169:                echo "No direct threading support for $host_cpu, using indirect threading."
1.20      anton     170:                echo "Using a generic machine description."
1.1       anton     171:                echo "I'll assume that C floats and doubles are represented by IEEE single and"
                    172:                echo "double numbers. If this is not so, SF@ etc. will not work correctly."
1.16      anton     173:                echo "FLUSH-ICACHE will do nothing, so END-CODE may not work properly!"
1.1       anton     174:                mach_h=32bit
                    175: esac
1.10      anton     176: AC_SUBST(host)
1.15      pazsan    177: AC_SUBST(ENGINE_FLAGS)
1.1       anton     178: 
                    179: dnl Now a little support for DOS/DJGCC
                    180: AC_SUBST(MAKE_EXE)
                    181: MAKE_EXE=""
                    182: 
1.24      anton     183: PATHSEP=":"
                    184: AC_SUBST(PATHSEP)
                    185: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP')
1.27      anton     186: 
                    187: AC_SUBST(FORTHSIZES)
1.24      anton     188: 
1.1       anton     189: dnl copy commands for systems that don't have links
1.29    ! pazsan    190: AC_SUBST(LINK_KERNL)
        !           191: LINK_KERNL=""
1.1       anton     192: 
                    193: #if test $host_os=dos
                    194: #then
                    195: #  echo Configuring for DOS!!!
                    196: #  MAKE_EXE="coff2exe gforth"
1.29    ! pazsan    197: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
1.1       anton     198: #fi
                    199: 
                    200: dnl the following macro produces a warning with autoconf-2.1
                    201: AC_C_BIGENDIAN
1.23      pazsan    202: AC_SUBST(KERNEL)
1.1       anton     203: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
                    204: if test $ac_cv_c_bigendian = yes; then
                    205:   bytesex=b
1.23      pazsan    206:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
1.1       anton     207: else
                    208:   bytesex=l
1.23      pazsan    209:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
1.1       anton     210: fi
                    211: 
                    212: dnl Checks for programs.
                    213: AC_PROG_LN_S
                    214: AC_PROG_INSTALL
                    215: 
                    216: dnl Checks for library functions
1.2       anton     217: dnl This check is just for making later checks link with libm.
                    218: dnl using sin here is no good idea since it is built-into gcc and typechecked
                    219: AC_CHECK_LIB(m,asin)
1.1       anton     220: AC_FUNC_MEMCMP
1.25      pazsan    221: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
1.17      anton     222: AC_CHECK_FUNCS(sys_siglist)
1.19      anton     223: AC_DECL_SYS_SIGLIST
1.8       anton     224: AC_CHECK_FUNC(getopt_long,getopt_long="",getopt_long="getopt.o getopt1.o")
1.1       anton     225: AC_SUBST(getopt_long)
1.11      anton     226: AC_CHECK_FUNCS(rint expm1 log1p)
1.1       anton     227: AC_REPLACE_FUNCS(ecvt)
                    228: dnl No check for select, because our replacement is no good under
                    229: dnl anything but DOS
1.28      anton     230: AC_CHECK_HEADERS(sys/mman.h)
                    231: AC_CHECK_FUNCS(mmap sysconf getpagesize)
1.1       anton     232: 
1.23      pazsan    233: kernel_fi=kernl${wordsize}${bytesex}.fi
                    234: AC_SUBST(kernel_fi)
1.8       anton     235: 
1.23      pazsan    236: AC_LINK_FILES(${mach_h}.h $kernel_fi,machine.h kernel.fi)
1.18      anton     237: AC_OUTPUT(Makefile,echo timestamp > stamp-h)
1.1       anton     238: 

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