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| author | Michael Meissner <gnu@the-meissners.org> | 1996-08-12 23:06:21 +0000 |
|---|---|---|
| committer | Michael Meissner <gnu@the-meissners.org> | 1996-08-12 23:06:21 +0000 |
| commit | 9aecf50da5ff4a6f6ab62fccac0010bf9519b8b2 (patch) | |
| tree | 4d5ef09a95ef28d5909de51be6618391f5dd2bd2 /sim/ppc | |
| parent | d9538961ccee460bce76d0e940a305c15eb171bf (diff) | |
| download | gdb-9aecf50da5ff4a6f6ab62fccac0010bf9519b8b2.zip gdb-9aecf50da5ff4a6f6ab62fccac0010bf9519b8b2.tar.gz gdb-9aecf50da5ff4a6f6ab62fccac0010bf9519b8b2.tar.bz2 | |
Test whether /dev/zero works before attemping to us it
Diffstat (limited to 'sim/ppc')
| -rw-r--r-- | sim/ppc/ChangeLog | 14 | ||||
| -rw-r--r-- | sim/ppc/Makefile.in | 4 | ||||
| -rw-r--r-- | sim/ppc/configure.in | 28 |
3 files changed, 45 insertions, 1 deletions
diff --git a/sim/ppc/ChangeLog b/sim/ppc/ChangeLog index e67bdfe..add31b5 100644 --- a/sim/ppc/ChangeLog +++ b/sim/ppc/ChangeLog @@ -1,3 +1,17 @@ +Mon Aug 12 18:42:37 1996 Michael Meissner <meissner@tiktok.cygnus.com> + + * configure.in: Test whether /dev/zero works on the system, and if + it does, define HAVE_DEVZERO. + * configure: Regenerate. + + * emul_generic.c (emul_add_tree_hardware): Do not add /iobus/disk + if we don't have a working /dev/zero on the system. + + * emul_bugapi.c (emul_bugapi_init): If HAVE_DEVZERO is not + defined, don't add disk support. + (emul_bugapi_do_diskio): Ditto. + (emul_bugapi_instruction_call): Ditto. + Wed Aug 7 14:34:20 1996 Michael Meissner <meissner@tiktok.cygnus.com> * emul_unix.c (HAVE_TCGETATTR): If HAVE_TERMIOS_STRUCTURE is not diff --git a/sim/ppc/Makefile.in b/sim/ppc/Makefile.in index 5ab3c22..1d36f65 100644 --- a/sim/ppc/Makefile.in +++ b/sim/ppc/Makefile.in @@ -88,6 +88,7 @@ MODEL_CFLAGS = @sim_model@ @sim_default_model@ @sim_model_issue@ STDIO_CFLAGS = @sim_stdio@ TERMIO_CFLAGS = @sim_termio@ WARNING_CFLAGS = @sim_warnings@ +DEVZERO_CFLAGS = @sim_devzero@ CONFIG_CFLAGS = $(BSWAP_CFLAGS) \ $(ENDIAN_CFLAGS) \ $(REGPARM_CFLAGS) \ @@ -107,7 +108,8 @@ CONFIG_CFLAGS = $(BSWAP_CFLAGS) \ $(MONITOR_CFLAGS) \ $(MODEL_CFLAGS) \ $(STDIO_CFLAGS) \ - $(TERMIO_CFLAGS) + $(TERMIO_CFLAGS) \ + $(DEVZERO_CFLAGS) STD_CFLAGS = $(CFLAGS) $(INLINE_CFLAGS) $(CONFIG_CFLAGS) $(WARNING_CFLAGS) $(SIM_CFLAGS) $(HDEFINES) $(TDEFINES) $(INCLUDES) NOWARN_CFLAGS = $(CFLAGS) $(INLINE_CFLAGS) $(CONFIG_CFLAGS) $(SIM_CFLAGS) $(HDEFINES) $(TDEFINES) $(INCLUDES) diff --git a/sim/ppc/configure.in b/sim/ppc/configure.in index 1314a93..4924f78 100644 --- a/sim/ppc/configure.in +++ b/sim/ppc/configure.in @@ -593,6 +593,33 @@ else ac_cv_termio_cline=no fi +dnl Figure out if /dev/zero exists or not +sim_devzero="" +AC_MSG_CHECKING(for /dev/zero) +AC_CACHE_VAL(ac_cv_devzero, +[AC_TRY_RUN([#include <fcntl.h> +main () { + char buf[2048]; + int i; + int fd = open ("/dev/zero", O_RDONLY); + if (fd < 0) + return 1; + for (i = 0; i < sizeof (buf); i++) + buf[i] = 1; + if (read (fd, buf, sizeof (buf)) != sizeof (buf)) + return 1; + for (i = 0; i < sizeof (buf); i++) + if (buf[i]) + return 1; + return 0; +}],[ac_cv_devzero=yes],[ac_cv_devzero=no],[ac_cv_devzero=no])]) +AC_MSG_RESULT($ac_cv_devzero) +if test $ac_cv_devzero = yes; then + sim_devzero="-DHAVE_DEVZERO" +else + sim_devzero="" +fi + AC_SUBST(CC_FOR_BUILD) AC_SUBST(CFLAGS) AC_SUBST(HDEFINES) @@ -637,6 +664,7 @@ AC_SUBST(sim_default_model) AC_SUBST(sim_model_issue) AC_SUBST(sim_stdio) AC_SUBST(sim_termio) +AC_SUBST(sim_devzero) AC_OUTPUT(Makefile, [case x$CONFIG_HEADERS in xconfig.h:config.in) echo > stamp-h ;; esac]) |