Annotation of gforth/configure.in, revision 1.2
1.1 anton 1: dnl Process this file with autoconf to produce a configure script.
2: AC_INIT(engine.c)
3:
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:
23: #terminology is a bit unusual here: The host is the system on which
24: #gforth will run; the system on which configure will run is the `build'
25: AC_CANONICAL_HOST
26: case "$host_cpu" in
27: hppa*)
28: mach_h=hppa
29: ;;
30: sparc*)
31: mach_h=sparc
32: ;;
33: i386|i486|i586)
34: mach_h=386
35: #!! direct/indirect threading switch
36: #!! -m486 flag
37: ;;
38: m68*)
39: mach_h=m68k
40: ;;
41: mips*)
42: mach_h=mips
43: #!! link text and data segment into the same 256M region!
44: #!! does cacheflush work on OSs other than Ultrix?
45: ;;
46: *)
47: echo "No direct threading support for $host_cpu, using indirect threading."
48: echo "Using a generic 32-bit machine description. It will only work if char * AND"
49: echo "long values have 32 bits."
50: echo "I'll assume that C floats and doubles are represented by IEEE single and"
51: echo "double numbers. If this is not so, SF@ etc. will not work correctly."
52: mach_h=32bit
53: esac
54:
55: dnl Now a little support for DOS/DJGCC
56: AC_SUBST(MAKE_EXE)
57: MAKE_EXE=""
58:
59: dnl copy commands for systems that don't have links
60: AC_SUBST(LINK_KERNL32L)
61: LINK_KERNL32L=""
62: AC_SUBST(LINK_KERNL32B)
63: LINK_KERNL32B=""
64:
65: #if test $host_os=dos
66: #then
67: # echo Configuring for DOS!!!
68: # MAKE_EXE="coff2exe gforth"
69: # LINK_KERNL32L='$(CP) kernl32l.fi gforth.fi'
70: #fi
71:
72: dnl the following macro produces a warning with autoconf-2.1
73: AC_C_BIGENDIAN
74: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
75: if test $ac_cv_c_bigendian = yes; then
76: bytesex=b
77: else
78: bytesex=l
79: fi
80:
81: dnl Checks for programs.
82: AC_PROG_LN_S
83: AC_PROG_INSTALL
84:
85: dnl Checks for library functions
1.2 ! anton 86: dnl This check is just for making later checks link with libm.
! 87: dnl using sin here is no good idea since it is built-into gcc and typechecked
! 88: AC_CHECK_LIB(m,asin)
1.1 anton 89: AC_FUNC_MEMCMP
90: AC_REPLACE_FUNCS(memmove strtoul)
91: AC_CHECK_FUNC(getopt_long,getop_long="",getopt_long="getopt.o getopt1.o")
92: AC_SUBST(getopt_long)
1.2 ! anton 93: AC_CHECK_FUNCS(rint expm1 log1p)
1.1 anton 94: AC_REPLACE_FUNCS(ecvt)
95: dnl No check for select, because our replacement is no good under
96: dnl anything but DOS
97:
98: dnl autoconf requires (implicitly) that AC_LINK_FILES is used only once
99: AC_LINK_FILES(${mach_h}.h kernl32${bytesex}.fi,machine.h gforth.fi)
100: AC_OUTPUT(Makefile)
101:
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