Annotation of gforth/configure.in, revision 1.19

1.1       anton       1: dnl Process this file with autoconf to produce a configure script.
                      2: AC_INIT(engine.c)
1.18      anton       3: AC_CONFIG_HEADER(config.h)
1.14      anton       4: 
1.1       anton       5: AC_ARG_ENABLE(force-reg,
                      6: [  --enable-force-reg    Use explicit register declarations if they appear in
                      7:                          the machine.h file. This can cause a good speedup,
                      8:                          but also incorrect code with some gcc versions on
                      9:                          some processors (default disabled).],
                     10: 
                     11: AC_DEFINE(FORCE_REG))
                     12: dnl this is not quite according to the autoconf manual, it causes a replacement
                     13: AC_ARG_ENABLE(direct-threaded,
                     14: [  --enable-direct-threaded    Force direct threading. This may not work on
                     15:                                some machines and may cause slowdown on others.
                     16:                                (default processor-dependent)],
                     17: AC_DEFINE(DIRECT_THREADED))
                     18: AC_ARG_ENABLE(indirect-threaded,
                     19: [  --enable-indirect-threaded  Force indirect threading. This can cause a
                     20:                                slowdown on some machines.
                     21:                                (default processor-dependent)],
                     22: AC_DEFINE(INDIRECT_THREADED))
                     23: 
1.9       pazsan     24: AC_ARG_WITH(debug,
1.10      anton      25: [  --with-debug     specifies option -g to compile with debug info (default)
1.9       pazsan     26:    --without-debug  omits the -g switch and creates smaller images on
                     27:                     machines where "strip" has problems with gcc style
                     28:                     debugging informations.],
                     29: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
                     30: 
1.16      anton      31: CFLAGS=$CFLAGS
                     32: 
1.15      pazsan     33: AC_PROG_CC
                     34: 
                     35: if test "$GCC" = "yes"
                     36: then
                     37:    echo "Fine, gcc is available"
                     38: else
                     39:    cat <<'EOF'
1.16      anton      40: Gforth requires GCC-2.0 or higher (it uses GNU C extensions).
                     41: It does not work with other C compilers. Please install the GNU C compiler,
                     42: and try again (or search for a binary distribution for your platform).
1.15      pazsan     43: EOF
                     44:    exit 1
                     45: fi
1.9       pazsan     46: 
1.15      pazsan     47: AC_SUBST(CC)
1.7       anton      48: AC_SUBST(GCCLDFLAGS)
1.9       pazsan     49: AC_SUBST(DEBUGFLAG)
1.7       anton      50: 
1.10      anton      51: dnl the following macro produces a warning with autoconf-2.1
                     52: AC_CHECK_SIZEOF(char *)
                     53: case "$ac_cv_sizeof_char_p" in
                     54:   2)
                     55:     wordsize=16
                     56:     ;;
                     57:   4)
                     58:     wordsize=32
                     59:     ;;
                     60:   8)
                     61:     wordsize=64
                     62: dnl    AC_CHECK_SIZEOF(long long)
                     63: dnl    if [ $ac_cv_sizeof_long_long != 16 ]
                     64: dnl    then
1.15      pazsan     65: dnl       try the whole thing with -mlonglong128
1.10      anton      66: dnl complain about C compiler and OS vendor
                     67: dnl    fi
                     68:     ;;
                     69: esac
1.9       pazsan     70: 
1.1       anton      71: #terminology is a bit unusual here: The host is the system on which
                     72: #gforth will run; the system on which configure will run is the `build'
                     73: AC_CANONICAL_HOST
                     74: case "$host_cpu" in
                     75:        hppa*)
                     76:                mach_h=hppa
1.3       pazsan     77:                LIBOBJS="cache.o"
1.6       pazsan     78:                LDFLAGS="-Xlinker -N"
                     79:                LIBS="-L/lib/pa1.1/"
1.1       anton      80:                ;;
                     81:        sparc*)
                     82:                mach_h=sparc
                     83:                ;;
                     84:        i386|i486|i586)
                     85:                mach_h=386
1.16      anton      86:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
1.1       anton      87:                #!! direct/indirect threading switch
                     88:                #!! -m486 flag
                     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."
1.16      anton     101:                echo "Using a generic machine description. It will only work if char * AND"
                    102:                echo "long values have the same size and long long is twice as long."
1.1       anton     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."
1.16      anton     105:                echo "FLUSH-ICACHE will do nothing, so END-CODE may not work properly!"
1.1       anton     106:                mach_h=32bit
                    107: esac
1.10      anton     108: AC_SUBST(host)
1.15      pazsan    109: AC_SUBST(ENGINE_FLAGS)
1.1       anton     110: 
                    111: dnl Now a little support for DOS/DJGCC
                    112: AC_SUBST(MAKE_EXE)
                    113: MAKE_EXE=""
                    114: 
                    115: dnl copy commands for systems that don't have links
1.6       pazsan    116: AC_SUBST(LINK_KERNL16L)
                    117: LINK_KERNL16L=""
                    118: AC_SUBST(LINK_KERNL16B)
                    119: LINK_KERNL16B=""
1.1       anton     120: AC_SUBST(LINK_KERNL32L)
                    121: LINK_KERNL32L=""
                    122: AC_SUBST(LINK_KERNL32B)
                    123: LINK_KERNL32B=""
1.6       pazsan    124: AC_SUBST(LINK_KERNL64L)
                    125: LINK_KERNL64L=""
                    126: AC_SUBST(LINK_KERNL64B)
                    127: LINK_KERNL64B=""
1.1       anton     128: 
                    129: #if test $host_os=dos
                    130: #then
                    131: #  echo Configuring for DOS!!!
                    132: #  MAKE_EXE="coff2exe gforth"
1.13      anton     133: #  LINK_KERNL32L='$(CP) kernl32l.fi kernal.fi'
1.1       anton     134: #fi
                    135: 
                    136: dnl the following macro produces a warning with autoconf-2.1
                    137: AC_C_BIGENDIAN
1.4       pazsan    138: AC_SUBST(KERNAL)
1.1       anton     139: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
                    140: if test $ac_cv_c_bigendian = yes; then
                    141:   bytesex=b
1.6       pazsan    142:   KERNAL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
1.1       anton     143: else
                    144:   bytesex=l
1.6       pazsan    145:   KERNAL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
1.1       anton     146: fi
                    147: 
                    148: dnl Checks for programs.
                    149: AC_PROG_LN_S
                    150: AC_PROG_INSTALL
                    151: 
                    152: dnl Checks for library functions
1.2       anton     153: dnl This check is just for making later checks link with libm.
                    154: dnl using sin here is no good idea since it is built-into gcc and typechecked
                    155: AC_CHECK_LIB(m,asin)
1.1       anton     156: AC_FUNC_MEMCMP
1.13      anton     157: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal)
1.17      anton     158: AC_CHECK_FUNCS(sys_siglist)
1.19    ! anton     159: AC_DECL_SYS_SIGLIST
1.8       anton     160: AC_CHECK_FUNC(getopt_long,getopt_long="",getopt_long="getopt.o getopt1.o")
1.1       anton     161: AC_SUBST(getopt_long)
1.11      anton     162: AC_CHECK_FUNCS(rint expm1 log1p)
1.1       anton     163: AC_REPLACE_FUNCS(ecvt)
                    164: dnl No check for select, because our replacement is no good under
                    165: dnl anything but DOS
                    166: 
1.13      anton     167: kernal_fi=kernl${wordsize}${bytesex}.fi
                    168: AC_SUBST(kernal_fi)
1.8       anton     169: 
1.13      anton     170: AC_LINK_FILES(${mach_h}.h $kernal_fi,machine.h kernal.fi)
1.18      anton     171: AC_OUTPUT(Makefile,echo timestamp > stamp-h)
1.1       anton     172: 

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