Annotation of gforth/configure.in, revision 1.15

1.1       anton       1: dnl Process this file with autoconf to produce a configure script.
                      2: AC_INIT(engine.c)
1.14      anton       3: 
1.1       anton       4: AC_ARG_ENABLE(force-reg,
                      5: [  --enable-force-reg    Use explicit register declarations if they appear in
                      6:                          the machine.h file. This can cause a good speedup,
                      7:                          but also incorrect code with some gcc versions on
                      8:                          some processors (default disabled).],
                      9: 
                     10: AC_DEFINE(FORCE_REG))
                     11: dnl this is not quite according to the autoconf manual, it causes a replacement
                     12: AC_ARG_ENABLE(direct-threaded,
                     13: [  --enable-direct-threaded    Force direct threading. This may not work on
                     14:                                some machines and may cause slowdown on others.
                     15:                                (default processor-dependent)],
                     16: AC_DEFINE(DIRECT_THREADED))
                     17: AC_ARG_ENABLE(indirect-threaded,
                     18: [  --enable-indirect-threaded  Force indirect threading. This can cause a
                     19:                                slowdown on some machines.
                     20:                                (default processor-dependent)],
                     21: AC_DEFINE(INDIRECT_THREADED))
                     22: 
1.9       pazsan     23: AC_ARG_WITH(debug,
1.10      anton      24: [  --with-debug     specifies option -g to compile with debug info (default)
1.9       pazsan     25:    --without-debug  omits the -g switch and creates smaller images on
                     26:                     machines where "strip" has problems with gcc style
                     27:                     debugging informations.],
                     28: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
                     29: 
1.15    ! pazsan     30: AC_PROG_CC
        !            31: 
        !            32: if test "$GCC" = "yes"
        !            33: then
        !            34:    echo "Fine, gcc is available"
        !            35: else
        !            36:    cat <<'EOF'
        !            37: Gforth uses the GNU-C extensions for better performance. It does not work
        !            38: with other C compilers. Please install a new version of the GNU-C compiler, and
        !            39: try again.
        !            40: EOF
        !            41:    exit 1
        !            42: fi
1.9       pazsan     43: 
1.15    ! pazsan     44: AC_SUBST(CC)
1.7       anton      45: AC_SUBST(GCCLDFLAGS)
1.9       pazsan     46: AC_SUBST(DEBUGFLAG)
1.7       anton      47: 
1.10      anton      48: dnl the following macro produces a warning with autoconf-2.1
                     49: AC_CHECK_SIZEOF(char *)
                     50: case "$ac_cv_sizeof_char_p" in
                     51:   2)
                     52:     wordsize=16
                     53:     ;;
                     54:   4)
                     55:     wordsize=32
                     56:     ;;
                     57:   8)
                     58:     wordsize=64
                     59: dnl    AC_CHECK_SIZEOF(long long)
                     60: dnl    if [ $ac_cv_sizeof_long_long != 16 ]
                     61: dnl    then
1.15    ! pazsan     62: dnl       try the whole thing with -mlonglong128
1.10      anton      63: dnl complain about C compiler and OS vendor
                     64: dnl    fi
                     65:     ;;
                     66: esac
1.9       pazsan     67: 
1.1       anton      68: #terminology is a bit unusual here: The host is the system on which
                     69: #gforth will run; the system on which configure will run is the `build'
                     70: AC_CANONICAL_HOST
                     71: case "$host_cpu" in
                     72:        hppa*)
                     73:                mach_h=hppa
1.3       pazsan     74:                LIBOBJS="cache.o"
1.6       pazsan     75:                LDFLAGS="-Xlinker -N"
                     76:                LIBS="-L/lib/pa1.1/"
1.1       anton      77:                ;;
                     78:        sparc*)
                     79:                mach_h=sparc
                     80:                ;;
                     81:        i386|i486|i586)
                     82:                mach_h=386
1.15    ! pazsan     83:                CFLAGS="-fomit-frame-pointer -fforce-addr -fforce-mem"
1.1       anton      84:                #!! direct/indirect threading switch
                     85:                #!! -m486 flag
                     86:                ;;
                     87:        m68*)
                     88:                mach_h=m68k
                     89:                ;;
                     90:        mips*)
                     91:                mach_h=mips
1.7       anton      92:                #link text and data segment into the same 256M region!
                     93:                GCCLDFLAGS="-Xlinker -T -Xlinker 10000000 -Xlinker -D -Xlinker 10400000"
1.1       anton      94:                ;;
1.9       pazsan     95:        alpha*)
                     96:                mach_h=alpha
                     97:                echo Very Preliminary Support for Alpha!!!
                     98:                ;;
1.1       anton      99:        *)
                    100:                echo "No direct threading support for $host_cpu, using indirect threading."
                    101:                echo "Using a generic 32-bit machine description. It will only work if char * AND"
                    102:                echo "long values have 32 bits."
                    103:                echo "I'll assume that C floats and doubles are represented by IEEE single and"
                    104:                echo "double numbers. If this is not so, SF@ etc. will not work correctly."
                    105:                mach_h=32bit
                    106: esac
1.10      anton     107: AC_SUBST(host)
1.15    ! pazsan    108: AC_SUBST(ENGINE_FLAGS)
1.1       anton     109: 
                    110: dnl Now a little support for DOS/DJGCC
                    111: AC_SUBST(MAKE_EXE)
                    112: MAKE_EXE=""
                    113: 
                    114: dnl copy commands for systems that don't have links
1.6       pazsan    115: AC_SUBST(LINK_KERNL16L)
                    116: LINK_KERNL16L=""
                    117: AC_SUBST(LINK_KERNL16B)
                    118: LINK_KERNL16B=""
1.1       anton     119: AC_SUBST(LINK_KERNL32L)
                    120: LINK_KERNL32L=""
                    121: AC_SUBST(LINK_KERNL32B)
                    122: LINK_KERNL32B=""
1.6       pazsan    123: AC_SUBST(LINK_KERNL64L)
                    124: LINK_KERNL64L=""
                    125: AC_SUBST(LINK_KERNL64B)
                    126: LINK_KERNL64B=""
1.1       anton     127: 
                    128: #if test $host_os=dos
                    129: #then
                    130: #  echo Configuring for DOS!!!
                    131: #  MAKE_EXE="coff2exe gforth"
1.13      anton     132: #  LINK_KERNL32L='$(CP) kernl32l.fi kernal.fi'
1.1       anton     133: #fi
                    134: 
                    135: dnl the following macro produces a warning with autoconf-2.1
                    136: AC_C_BIGENDIAN
1.4       pazsan    137: AC_SUBST(KERNAL)
1.1       anton     138: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
                    139: if test $ac_cv_c_bigendian = yes; then
                    140:   bytesex=b
1.6       pazsan    141:   KERNAL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
1.1       anton     142: else
                    143:   bytesex=l
1.6       pazsan    144:   KERNAL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
1.1       anton     145: fi
                    146: 
                    147: dnl Checks for programs.
                    148: AC_PROG_LN_S
                    149: AC_PROG_INSTALL
                    150: 
                    151: dnl Checks for library functions
1.2       anton     152: dnl This check is just for making later checks link with libm.
                    153: dnl using sin here is no good idea since it is built-into gcc and typechecked
                    154: AC_CHECK_LIB(m,asin)
1.1       anton     155: AC_FUNC_MEMCMP
1.13      anton     156: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal)
1.8       anton     157: AC_CHECK_FUNC(getopt_long,getopt_long="",getopt_long="getopt.o getopt1.o")
1.1       anton     158: AC_SUBST(getopt_long)
1.11      anton     159: AC_CHECK_FUNCS(rint expm1 log1p)
1.1       anton     160: AC_REPLACE_FUNCS(ecvt)
                    161: dnl No check for select, because our replacement is no good under
                    162: dnl anything but DOS
                    163: 
1.13      anton     164: kernal_fi=kernl${wordsize}${bytesex}.fi
                    165: AC_SUBST(kernal_fi)
1.8       anton     166: 
1.13      anton     167: AC_LINK_FILES(${mach_h}.h $kernal_fi,machine.h kernal.fi)
1.1       anton     168: AC_OUTPUT(Makefile)
                    169: 

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