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sim: ppc: drop unused /dev/zero logic

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Nothing in the tree checks this option, or has checked for decades.
The pre-cvs-import ChangeLog suggests this was added & removed back
then, but can't be sure as that history doesn't exist in the VCS.
This commit is contained in:
Mike Frysinger 2022-11-05 10:02:58 +07:00
parent 1b2af6a41e
commit 0fa7ad4eb4
4 changed files with 1 additions and 84 deletions
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4
sim/ppc/Makefile.in
View File

@ -74,7 +74,6 @@ FLOAT_CFLAGS = @sim_float@
MONITOR_CFLAGS = @sim_monitor@
MODEL_CFLAGS = @sim_model@ @sim_default_model@ @sim_model_issue@
TERMIO_CFLAGS = @sim_termio@
DEVZERO_CFLAGS = @sim_devzero@
CONFIG_CFLAGS = \
$(SMP_CFLAGS) \
$(XOR_ENDIAN_CFLAGS) \
@ -84,8 +83,7 @@ CONFIG_CFLAGS = \
$(FLOAT_CFLAGS) \
$(MONITOR_CFLAGS) \
$(MODEL_CFLAGS) \
$(TERMIO_CFLAGS) \
$(DEVZERO_CFLAGS)
$(TERMIO_CFLAGS)
SIM_FPU_CFLAGS = -DHAVE_COMMON_FPU -I../common -I${srcdir}/../common
STD_CFLAGS = $(CFLAGS) $(WERROR_CFLAGS) $(INLINE_CFLAGS) $(CONFIG_CFLAGS) $(WARN_CFLAGS) $(INCLUDES) $(INCGNU) $(SIM_FPU_CFLAGS)

49
sim/ppc/configure vendored
View File

@ -621,7 +621,6 @@ ac_includes_default="\
ac_subst_vars='LTLIBOBJS
LIBOBJS
sim_devzero
sim_termio
sim_model_issue
sim_default_model
@ -4157,53 +4156,6 @@ _ACEOF
fi
sim_devzero=""
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for /dev/zero" >&5
$as_echo_n "checking for /dev/zero... " >&6; }
if ${ac_cv_devzero+:} false; then :
$as_echo_n "(cached) " >&6
else
if test "$cross_compiling" = yes; then :
ac_cv_devzero=no
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <fcntl.h>
main () {
char buf[2048];
int i;
int fd = open ("/dev/zero", O_RDONLY);
if (fd < 0)
return 1;
for (i = 0; i < sizeof (buf); i++)
buf[i] = 1;
if (read (fd, buf, sizeof (buf)) != sizeof (buf))
return 1;
for (i = 0; i < sizeof (buf); i++)
if (buf[i])
return 1;
return 0;
}
_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
ac_cv_devzero=yes
else
ac_cv_devzero=no
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
conftest.$ac_objext conftest.beam conftest.$ac_ext
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_devzero" >&5
$as_echo "$ac_cv_devzero" >&6; }
if test $ac_cv_devzero = yes; then
sim_devzero="-DHAVE_DEVZERO"
else
sim_devzero=""
fi
# Since we run commands on the build system, we have to create a
# separate config header for the build system if build != host.
if test x$host = x$build; then
@ -4257,7 +4209,6 @@ fi
ac_config_files="$ac_config_files Makefile"

28
sim/ppc/configure.ac
View File

@ -490,33 +490,6 @@ fi
AC_CHECK_TYPES(long long)
dnl Figure out if /dev/zero exists or not
sim_devzero=""
AC_MSG_CHECKING(for /dev/zero)
AC_CACHE_VAL(ac_cv_devzero,
[AC_TRY_RUN([#include <fcntl.h>
main () {
char buf[2048];
int i;
int fd = open ("/dev/zero", O_RDONLY);
if (fd < 0)
return 1;
for (i = 0; i < sizeof (buf); i++)
buf[i] = 1;
if (read (fd, buf, sizeof (buf)) != sizeof (buf))
return 1;
for (i = 0; i < sizeof (buf); i++)
if (buf[i])
return 1;
return 0;
}],[ac_cv_devzero=yes],[ac_cv_devzero=no],[ac_cv_devzero=no])])
AC_MSG_RESULT($ac_cv_devzero)
if test $ac_cv_devzero = yes; then
sim_devzero="-DHAVE_DEVZERO"
else
sim_devzero=""
fi
# Since we run commands on the build system, we have to create a
# separate config header for the build system if build != host.
if test x$host = x$build; then
@ -570,7 +543,6 @@ AC_SUBST(sim_model)
AC_SUBST(sim_default_model)
AC_SUBST(sim_model_issue)
AC_SUBST(sim_termio)
AC_SUBST(sim_devzero)
AC_OUTPUT(Makefile,
[case x$CONFIG_HEADERS in xconfig.h:config.in) echo > stamp-h ;; esac])

4
sim/ppc/options.c
View File

@ -198,10 +198,6 @@ print_options (void)
#ifdef HAVE_TERMIO_STRUCTURE
"HAVE_TERMIO_STRUCTURE",
#endif
#ifdef HAVE_DEVZERO
"HAVE_DEVZERO",
#endif
};
int i;