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Re: PATCH: New approach to --with-cpu, take 4
On Fri, Aug 02, 2002 at 12:19:43PM -0400, Daniel Jacobowitz wrote:
> On Thu, Aug 01, 2002 at 04:58:06PM -0400, John David Anglin wrote:
> > > OK? More comments?
> >
> > There are a couple of new warnings on the PA when no default scheduling
> > model is specified:
> >
> > gcc -DIN_GCC -g -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wtraditional -pedantic -Wno-long-long -DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/config -I../../gcc/gcc/../include \
> > -DSTANDARD_STARTFILE_PREFIX=\"../../../\" -DSTANDARD_EXEC_PREFIX=\"/home/dave/opt/gnu/lib/gcc-lib/\" -DDEFAULT_TARGET_VERSION=\"3.3\" -DDEFAULT_TARGET_MACHINE=\"hppa-linux\" -DSTANDARD_BINDIR_PREFIX=\"/home/dave/opt/gnu/bin/\" -DTOOLDIR_BASE_PREFIX=\"../../../../\" `test "X${SHLIB_LINK}" = "X" || test "yes" != "yes" || echo "-DENABLE_SHARED_LIBGCC"` `test "X${SHLIB_MULTILIB}" = "X" || echo "-DNO_SHARED_LIBGCC_MULTILIB"` \
> > -c ../../gcc/gcc/gcc.c -o gcc.o)
> > ../../gcc/gcc/gcc.c:671: warning: string length `536' is greater than the length `509' ISO C89 compilers are required to support
> > ../../gcc/gcc/gcc.c: In function `process_command':
> > ../../gcc/gcc/gcc.c:3822: warning: comparison between signed and unsigned
> > ../../gcc/gcc/gcc.c:3957: warning: comparison between signed and unsigned
> > ../../gcc/gcc/gcc.c: At top level:
> > ../../gcc/gcc/gcc.c:1002: warning: `option_present' defined but not used
> > ../../gcc/gcc/gcc.c:1028: warning: `add_option' defined but not used
>
> What does one do with a static function that is only conditionally
> called? I suppose I could wrap it in all the conditions under which it
> might be called, but that seems awkward.
One uses ATTRIBUTE_UNUSED. Here's take five; the warnings are gone,
the string concatenation is gone, and the MIPS code now behaves exactly
the same as cc1 and comments on that.
--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer
2002-08-02 Daniel Jacobowitz <drow@mvista.com>
* Makefile.in (DRIVER_DEFINES): Add @target_default_options@
* configure.in: Add @target_default_options@. Document --with-cpu,
--with-arch, --with-tune, --with-schedule, and --with-float.
* config.gcc: Reorganize $with_cpu logic. Set
target_default_options according to the default CPU, $with_cpu,
$with_arch, $with_tune, $with_schedule, and $with_float.
Recognize legal scheduling models for HPPA.
* config/mips/mips.h (TARGET_DEFAULT_ARCH_P)
(TARGET_DEFAULT_FLOAT_P): New macros.
* gcc.c (default_options, add_option, option_present)
(last_option_present): New functions.
(process_command): Call default_options.
* doc/install.texi: Update --with-cpu documentation. Mention
--with-arch, --with-schedule, --with-tune, and --with-float.
Index: Makefile.in
===================================================================
RCS file: /cvs/gcc/gcc/gcc/Makefile.in,v
retrieving revision 1.920
diff -u -p -r1.920 Makefile.in
--- Makefile.in 2 Aug 2002 02:41:36 -0000 1.920
+++ Makefile.in 2 Aug 2002 20:08:22 -0000
@@ -1251,6 +1251,7 @@ c-dump.o : c-dump.c $(CONFIG_H) $(SYSTEM
# Language-independent files.
DRIVER_DEFINES = \
+ @target_default_options@ \
-DSTANDARD_STARTFILE_PREFIX=\"$(unlibsubdir)/\" \
-DSTANDARD_EXEC_PREFIX=\"$(libdir)/gcc-lib/\" \
-DDEFAULT_TARGET_VERSION=\"$(version)\" \
Index: config.gcc
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config.gcc,v
retrieving revision 1.230
diff -u -p -r1.230 config.gcc
--- config.gcc 31 Jul 2002 23:18:38 -0000 1.230
+++ config.gcc 2 Aug 2002 20:08:23 -0000
@@ -2782,173 +2782,190 @@ case $machine in
;;
esac
-# Distinguish i[34567]86
-# Also, do not run mips-tfile on MIPS if using gas.
-# Process --with-cpu= for PowerPC/rs6000
-target_cpu_default2=
-case $machine in
-i486-*-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_i486
- ;;
-i586-*-*)
- case $target_alias in
- k6_2-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_k6_2
- ;;
- k6_3-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_k6_3
- ;;
- k6-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_k6
- ;;
- pentium_mmx-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_pentium_mmx
- ;;
- *)
- target_cpu_default2=TARGET_CPU_DEFAULT_pentium
- ;;
- esac
- ;;
-i686-*-* | i786-*-*)
- case $target_alias in
- athlon_xp-*|athlon_mp-*|athlon_4-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_athlon_sse
- ;;
- athlon_tbird-*|athlon-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_athlon
- ;;
- pentium2-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_pentium2
- ;;
- pentium3-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_pentium3
- ;;
- pentium4-*)
- target_cpu_default2=TARGET_CPU_DEFAULT_pentium4
- ;;
- *)
- target_cpu_default2=TARGET_CPU_DEFAULT_pentiumpro
+if test x$pass2done = xyes
+then
+ case "x$with_cpu" in
+ xyes | xno)
+ echo "--with-cpu must be passed a value" 1>&2
+ exit 1
;;
esac
- ;;
-x86_64-*-*)
- # We should have hammer chip here, but it does not exist yet and
- # thus it is not supported. Athlon_SSE is probably equivalent feature
- # wise to hammer from our point of view except for 64bit mode.
- target_cpu_default2=TARGET_CPU_DEFAULT_athlon_sse
- ;;
-alpha*-*-*)
- case $machine in
- alphaev6[78]*)
- target_cpu_default2="MASK_CPU_EV6|MASK_BWX|MASK_MAX|MASK_FIX|MASK_CIX"
- ;;
- alphaev6*)
- target_cpu_default2="MASK_CPU_EV6|MASK_BWX|MASK_MAX|MASK_FIX"
- ;;
- alphapca56*)
- target_cpu_default2="MASK_CPU_EV5|MASK_BWX|MASK_MAX"
- ;;
- alphaev56*)
- target_cpu_default2="MASK_CPU_EV5|MASK_BWX"
+
+ # If there is no $with_cpu option, try to infer one from ${machine}.
+ if test x$with_cpu = x
+ then
+ case $machine in
+ i486-*-*)
+ with_cpu=i486
+ ;;
+ i586-*-*)
+ case $target_alias in
+ k6_2-*)
+ with_cpu=k6-2
+ ;;
+ k6_3-*)
+ with_cpu=k6-3
+ ;;
+ k6-*)
+ with_cpu=k6
+ ;;
+ pentium_mmx-*)
+ with_cpu=pentium-mmx
+ ;;
+ *)
+ with_cpu=pentium
+ ;;
+ esac
+ ;;
+ i686-*-* | i786-*-*)
+ case $target_alias in
+ athlon_xp-*|athlon_mp-*|athlon_4-*)
+ with_cpu=athlon-4
+ ;;
+ athlon_tbird-*|athlon-*)
+ with_cpu=athlon
+ ;;
+ pentium2-*)
+ with_cpu=pentium2
+ ;;
+ pentium3-*)
+ with_cpu=pentium3
+ ;;
+ pentium4-*)
+ with_cpu=pentium4
+ ;;
+ *)
+ with_cpu=pentiumpro
+ ;;
+ esac
+ ;;
+ x86_64-*-*)
+ # We should have hammer chip here, but it does not
+ # exist yet and thus it is not supported. Athlon_SSE
+ # is probably equivalent feature wise to hammer from
+ # our point of view except for 64bit mode.
+ with_cpu=athlon-sse
+ ;;
+ alpha*-*-*)
+ case $machine in
+ alphaev6[78]*)
+ with_cpu=ev67
+ ;;
+ alphaev6*)
+ with_cpu=ev6
+ ;;
+ alphapca56*)
+ with_cpu=pca56
+ ;;
+ alphaev56*)
+ with_cpu=ev56
+ ;;
+ alphaev5*)
+ with_cpu=ev5
+ ;;
+ esac
;;
- alphaev5*)
- target_cpu_default2="MASK_CPU_EV5"
+ sparc*-*-*)
+ with_cpu="`echo $machine | sed 's/-.*$//'`"
;;
- esac
+ esac
+ fi
- if test x$gas = xyes
- then
- if test "$target_cpu_default2" = ""
+ case "$machine" in
+ alpha*-*-*)
+ if test x$gas = xyes
then
- target_cpu_default2="MASK_GAS"
- else
- target_cpu_default2="${target_cpu_default2}|MASK_GAS"
+ if test "$target_cpu_default2" = ""
+ then
+ target_cpu_default2="MASK_GAS"
+ else
+ target_cpu_default2="${target_cpu_default2}|MASK_GAS"
+ fi
fi
- fi
- ;;
-arm*-*-*)
- case "x$with_cpu" in
- x)
- # The most generic
- target_cpu_default2="TARGET_CPU_generic"
- ;;
-
+ ;;
+ arm*-*-*)
+ # Start with the most generic.
+ target_cpu_default2="TARGET_CPU_generic"
# Distinguish cores, and major variants
# arm7m doesn't exist, but D & I don't affect code
+ case "x$with_cpu" in
xarm[236789] | xarm250 | xarm[67][01]0 \
| xarm7m | xarm7dm | xarm7dmi | xarm[79]tdmi \
| xarm7100 | xarm7500 | xarm7500fe | xarm810 \
| xxscale \
| xstrongarm | xstrongarm110 | xstrongarm1100)
- target_cpu_default2="TARGET_CPU_$with_cpu"
+ # OK
;;
- xyes | xno)
- echo "--with-cpu must be passed a value" 1>&2
+ *)
+ echo "Unknown cpu used with --with-cpu=$with_cpu" 1>&2
exit 1
;;
-
- *)
- if test x$pass2done = xyes
- then
- echo "Unknown cpu used with --with-cpu=$with_cpu" 1>&2
+ esac
+ ;;
+ hppa*-*-* | parisc*-*-*)
+ if test x$gas = xyes
+ then
+ target_cpu_default2="MASK_GAS|MASK_JUMP_IN_DELAY"
+ fi
+ case ".$with_schedule" in
+ .700 | .7100 | .7100LC | .7200 | .7300 | .8000)
+ ;;
+ .)
+ case $machine in
+ hppa1* | parisc1*)
+ # Override default PA8000
+ # scheduling model.
+ with_schedule=7100LC
+ ;;
+ esac
+ ;;
+ *)
+ echo "Unknown cpu used with --with-schedule=$with_schedule" 1>&2
exit 1
+ ;;
+ esac
+ ;;
+ mips*-*-*)
+ case $machine in
+ mips*-*-ecoff* | mips*-*-elf*)
+ if test x$gas = xyes
+ then
+ if test x$gnu_ld = xyes
+ then
+ target_cpu_default2="MASK_GAS|MASK_SPLIT_ADDR"
+ else
+ target_cpu_default2="MASK_GAS"
+ fi
fi
;;
- esac
- ;;
-
-hppa*-*-* | parisc*-*-*)
- if test x$gas = xyes
- then
- target_cpu_default2="MASK_GAS|MASK_JUMP_IN_DELAY"
- fi
- case $machine in
- hppa1* | parisc1*)
- tm_defines="TARGET_SCHED_DEFAULT=\\\"7100LC\\\""
- ;;
- esac
- ;;
-mips*-*-*)
- case $machine in
- mips*-*-ecoff* | mips*-*-elf*)
- if test x$gas = xyes
- then
- if test x$gnu_ld = xyes
+ mips*-*-*)
+ if test x$gas = xyes
then
- target_cpu_default2="MASK_GAS|MASK_SPLIT_ADDR"
- else
target_cpu_default2="MASK_GAS"
fi
- fi
- ;;
- mips*-*-*)
- if test x$gas = xyes
+ ;;
+ esac
+ case $machine in
+ mips*el-*-*)
+ tm_defines="TARGET_ENDIAN_DEFAULT=0 $tm_defines"
+ ;;
+ esac
+ if test "x$enable_gofast" = xyes
then
- target_cpu_default2="MASK_GAS"
+ tm_defines="INIT_SUBTARGET_OPTABS=INIT_GOFAST_OPTABS $tm_defines"
+ tm_file="gofast.h $tm_file"
+ tmake_file="mips/t-gofast $tmake_file"
+ else
+ tmake_file="mips/t-mips $tmake_file"
fi
;;
- esac
- case $machine in
- mips*el-*-*)
- tm_defines="TARGET_ENDIAN_DEFAULT=0 $tm_defines"
- ;;
- esac
- if test "x$enable_gofast" = xyes
- then
- tm_defines="INIT_SUBTARGET_OPTABS=INIT_GOFAST_OPTABS $tm_defines"
- tm_file="gofast.h $tm_file"
- tmake_file="mips/t-gofast $tmake_file"
- else
- tmake_file="mips/t-mips $tmake_file"
- fi
- ;;
-powerpc*-*-* | rs6000-*-*)
- if test x$enable_altivec = xyes
- then
- tm_file="$tm_file rs6000/altivec-defs.h"
- fi
- case "x$with_cpu" in
+ powerpc*-*-* | rs6000-*-*)
+ if test x$enable_altivec = xyes
+ then
+ tm_file="$tm_file rs6000/altivec-defs.h"
+ fi
+ case "x$with_cpu" in
x)
;;
@@ -2963,49 +2980,48 @@ powerpc*-*-* | rs6000-*-*)
target_cpu_default2="\\\"$with_cpu\\\""
;;
- xyes | xno)
- echo "--with-cpu must be passed a value" 1>&2
- exit 1
- ;;
-
*)
- if test x$pass2done = xyes
- then
- echo "Unknown cpu used with --with-cpu=$with_cpu" 1>&2
- exit 1
- fi
- ;;
- esac
- c_target_objs="${c_target_objs} rs6000-c.o"
- cxx_target_objs="${cxx_target_objs} rs6000-c.o"
- tmake_file="${tmake_file} rs6000/t-rs6000-c-rule"
- ;;
-sparc*-*-*)
- case ".$with_cpu" in
- .)
- target_cpu_default2=TARGET_CPU_"`echo $machine | sed 's/-.*$//'`"
+ echo "Unknown cpu used with --with-cpu=$with_cpu" 1>&2
+ exit 1
;;
+ esac
+ c_target_objs="${c_target_objs} rs6000-c.o"
+ cxx_target_objs="${cxx_target_objs} rs6000-c.o"
+ tmake_file="${tmake_file} rs6000/t-rs6000-c-rule"
+ ;;
+ sparc*-*-*)
+ case .$with_cpu in
.supersparc | .hypersparc | .ultrasparc | .v7 | .v8 | .v9)
target_cpu_default2="TARGET_CPU_$with_cpu"
;;
*)
- if test x$pass2done = xyes
- then
- echo "Unknown cpu used with --with-cpu=$with_cpu" 1>&2
- exit 1
- fi
+ echo "Unknown cpu used with --with-cpu=$with_cpu" 1>&2
+ exit 1
;;
+ esac
+ ;;
esac
- ;;
-esac
-if test "$target_cpu_default2" != ""
-then
- if test "$target_cpu_default" != ""
+ t=
+ for option in cpu arch tune schedule float
+ do
+ val=`eval 'echo $with_'$option`
+ if test -n "$val"; then
+ upper=`echo $option | tr '[a-z]' '[A-Z]'`
+ option="TARGET_DEFAULT_OPTION_$upper"
+ t="${t} -D${option}=\"\\\"${val}\\\"\""
+ fi
+ done
+ target_default_options="${t}"
+
+ if test "$target_cpu_default2" != ""
then
- target_cpu_default="(${target_cpu_default}|${target_cpu_default2})"
- else
- target_cpu_default=$target_cpu_default2
+ if test "$target_cpu_default" != ""
+ then
+ target_cpu_default="(${target_cpu_default}|${target_cpu_default2})"
+ else
+ target_cpu_default=$target_cpu_default2
+ fi
fi
fi
Index: configure.in
===================================================================
RCS file: /cvs/gcc/gcc/gcc/configure.in,v
retrieving revision 1.612
diff -u -p -r1.612 configure.in
--- configure.in 29 Jul 2002 22:07:27 -0000 1.612
+++ configure.in 2 Aug 2002 20:08:25 -0000
@@ -136,6 +136,20 @@ AC_ARG_WITH(elf,
elf="$with_elf",
elf=no)
+# With a particular CPU
+AC_ARG_WITH(cpu,
+[ --with-cpu default to -mcpu=CPU],,)
+AC_ARG_WITH(arch,
+[ --with-arch default to -march=CPU],,)
+AC_ARG_WITH(schedule,
+[ --with-schedule default to -mschedule=CPU],,)
+AC_ARG_WITH(tune,
+[ --with-tune default to -mtune=CPU],,)
+
+# Default floating-point setting
+AC_ARG_WITH(float,
+[ --with-float default to the specified type of floating point],,)
+
# Specify the local prefix
local_prefix=
AC_ARG_WITH(local-prefix,
@@ -2694,6 +2708,7 @@ AC_SUBST(target_alias)
AC_SUBST(c_target_objs)
AC_SUBST(cxx_target_objs)
AC_SUBST(target_cpu_default)
+AC_SUBST(target_default_options)
AC_SUBST_FILE(target_overrides)
AC_SUBST_FILE(host_overrides)
Index: gcc.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/gcc.c,v
retrieving revision 1.333
diff -u -p -r1.333 gcc.c
--- gcc.c 1 Aug 2002 06:24:59 -0000 1.333
+++ gcc.c 2 Aug 2002 20:08:26 -0000
@@ -990,6 +990,139 @@ static const struct option_map option_ma
};
+static const char *last_option_present PARAMS ((int, const char *const *,
+ const char *))
+ ATTRIBUTE_UNUSED;
+static int option_present PARAMS ((int, const char *const *, const char *))
+ ATTRIBUTE_UNUSED;
+static void add_option PARAMS ((int *, const char *const **, const char *))
+ ATTRIBUTE_UNUSED;
+static void default_options PARAMS ((int *, const char *const **));
+
+static const char *
+last_option_present (argc, argv, option)
+ int argc;
+ const char *const *argv;
+ const char *option;
+{
+ const char *const *cur_arg = &argv[argc - 1];
+
+ while (cur_arg != argv)
+ {
+ if (strncmp (*cur_arg, option, strlen (option)) == 0)
+ return *cur_arg;
+ cur_arg --;
+ }
+
+ return NULL;
+}
+
+static int
+option_present (argc, argv, option)
+ int argc;
+ const char *const *argv;
+ const char *option;
+{
+ int i;
+ int len;
+
+ len = strlen (option);
+
+ for (i = 0; i < argc; i++)
+ if (option[len - 1] == '=')
+ {
+ if (strncmp (argv[i], option, len) == 0)
+ return 1;
+ }
+ else
+ {
+ if (strcmp (argv[i], option) == 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+static void
+add_option (argcp, argvp, option)
+ int *argcp;
+ const char *const **argvp;
+ const char *option;
+{
+ const char **newargv = (const char **) xmalloc ((*argcp + 2) * sizeof (char *));
+ int i;
+
+ newargv[0] = (*argvp)[0];
+ newargv[1] = option;
+ for (i = 1; i < *argcp; i++)
+ newargv[i + 1] = (*argvp)[i];
+ newargv[i + 1] = NULL;
+
+ *argvp = newargv;
+ (*argcp)++;
+}
+
+#ifndef TARGET_DEFAULT_ARCH_P
+#define TARGET_DEFAULT_ARCH_P() (! option_present (*argcp, *argvp, "-march="))
+#endif
+
+#ifndef TARGET_DEFAULT_CPU_P
+#define TARGET_DEFAULT_CPU_P() (! option_present (*argcp, *argvp, "-mcpu="))
+#endif
+
+#ifndef TARGET_DEFAULT_SCHEDULE_P
+#define TARGET_DEFAULT_SCHEDULE_P() (! option_present (*argcp, *argvp, \
+ "-mschedule="))
+#endif
+
+#ifndef TARGET_DEFAULT_TUNE_P
+#define TARGET_DEFAULT_TUNE_P() (! option_present (*argcp, *argvp, "-mtune="))
+#endif
+
+#ifndef TARGET_DEFAULT_FLOAT_P
+#define TARGET_DEFAULT_FLOAT_P() (! option_present (*argcp, *argvp, \
+ "-msoft-float") \
+ && ! option_present (*argcp, *argvp, \
+ "-mhard-float"))
+#endif
+
+static void
+default_options (argcp, argvp)
+ int *argcp ATTRIBUTE_UNUSED;
+ const char *const **argvp ATTRIBUTE_UNUSED;
+{
+#ifdef TARGET_DEFAULT_OPTION_ARCH
+ if (TARGET_DEFAULT_ARCH_P ())
+ add_option (argcp, argvp, concat ("-march=", TARGET_DEFAULT_OPTION_ARCH,
+ NULL));
+#endif
+
+#ifdef TARGET_DEFAULT_OPTION_CPU
+ if (TARGET_DEFAULT_CPU_P ())
+ add_option (argcp, argvp, concat ("-mcpu=", TARGET_DEFAULT_OPTION_CPU,
+ NULL));
+#endif
+
+#ifdef TARGET_DEFAULT_OPTION_SCHEDULE
+ if (TARGET_DEFAULT_SCHEDULE_P ())
+ add_option (argcp, argvp, concat ("-mschedule=",
+ TARGET_DEFAULT_OPTION_SCHEDULE, NULL));
+#endif
+
+#ifdef TARGET_DEFAULT_OPTION_TUNE
+ if (TARGET_DEFAULT_TUNE_P ())
+ add_option (argcp, argvp, concat ("-mtune=", TARGET_DEFAULT_OPTION_TUNE,
+ NULL));
+#endif
+
+#ifdef TARGET_DEFAULT_OPTION_FLOAT
+ if (TARGET_DEFAULT_FLOAT_P ())
+ add_option (argcp, argvp, concat ("-m", TARGET_DEFAULT_OPTION_FLOAT, "-float",
+ NULL));
+#endif
+}
+
+
#ifdef TARGET_OPTION_TRANSLATE_TABLE
static const struct {
const char *const option_found;
@@ -3374,6 +3507,9 @@ process_command (argc, argv)
/* Convert new-style -- options to old-style. */
translate_options (&argc, &argv);
+
+ /* Add any default options. */
+ default_options (&argc, &argv);
/* Do language-specific adjustment/addition of flags. */
lang_specific_driver (&argc, &argv, &added_libraries);
Index: config/mips/mips.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/mips/mips.h,v
retrieving revision 1.206
diff -u -p -r1.206 mips.h
--- config/mips/mips.h 31 Jul 2002 02:13:31 -0000 1.206
+++ config/mips/mips.h 2 Aug 2002 20:09:17 -0000
@@ -737,6 +737,19 @@ extern void sbss_section PARAMS ((void)
N_("Specify cache flush function")}, \
}
+/* This is not quite ideal. The last -mips<N> option specified wins, even
+ though -mips16 is orthogonal to the other options. Handle the current
+ status quo for now. */
+#define TARGET_DEFAULT_ARCH_P() \
+ (! option_present (*argcp, *argvp, "-march=") \
+ && (! last_option_present (*argcp, *argvp, "-mips") \
+ || !strcmp (last_option_present (*argcp, *argvp, "-mips"), "-mips16")))
+
+#define TARGET_DEFAULT_FLOAT_P() \
+ (! option_present (*argcp, *argvp, "-msoft-float") \
+ && ! option_present (*argcp, *argvp, "-mhard-float") \
+ && ! option_present (*argcp, *argvp, "-msingle-float"))
+
/* This is meant to be redefined in the host dependent files. */
#define SUBTARGET_TARGET_OPTIONS
Index: doc/install.texi
===================================================================
RCS file: /cvs/gcc/gcc/gcc/doc/install.texi,v
retrieving revision 1.128
diff -u -p -r1.128 install.texi
--- doc/install.texi 30 Jun 2002 19:27:48 -0000 1.128
+++ doc/install.texi 2 Aug 2002 20:09:21 -0000
@@ -671,11 +671,24 @@ Microsoft Win32 API thread support.
@item --with-cpu=@var{cpu}
Specify which cpu variant the
-compiler should generate code for by default. This is currently
-only supported on the some ports, specifically arm, powerpc, and
-SPARC@. If configure does not recognize the model name (e.g.@: arm700,
-603e, or ultrasparc) you provide, please check the configure script
-for a complete list of supported models.
+compiler should generate code for by default. @var{cpu}
+will be used as the default value of the @code{-mcpu=} switch.
+This option is only supported on some ports, including arm, i386, powerpc,
+and SPARC@.
+
+@item --with-schedule=@var{cpu}
+@itemx --with-arch=@var{cpu}
+@itemx --with-tune=@var{cpu}
+These configure options provide default values for the @code{-mschedule=},
+@code{-march=}, and @code{-mtune=} options, respectively. As with
+@code{--with-cpu} the legal values of @var{CPU} depend on the port; these
+options are not valid for all ports, only those which accept the respective
+options.
+
+@item --with-float=@var{type}
+Specify the default form of floating point. The normal choices are ``hard''
+and ``soft''. Which (if any) choices are recognized depends on the port;
+for instance, MIPS also recognizes ``single''.
@item --enable-altivec
Specify that the target supports AltiVec vector enhancements. This