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* libtool.m4: Update AC_LIBTOOL_SYS_MAX_CMD_LEN bits from upstream.

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From-SVN: r98064
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Mike Stump 2005-04-13 01:12:15 +00:00 committed by Mike Stump
parent e7590e9543
commit bf070c29a3
2 changed files with 65 additions and 0 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2005-04-12 Mike Stump <mrs@apple.com>
* libtool.m4: Update AC_LIBTOOL_SYS_MAX_CMD_LEN bits from upstream.
2005-04-04 Thomas Koenig <Thomas.Koenig@online.de>
* MAINTAINERS (Write After Approval): Add myself.

61
libtool.m4 vendored
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@ -103,6 +103,8 @@ AC_REQUIRE([AC_OBJEXT])dnl
AC_REQUIRE([AC_EXEEXT])dnl
dnl
AC_LIBTOOL_SYS_MAX_CMD_LEN
# Only perform the check for file, if the check method requires it
case $deplibs_check_method in
file_magic*)
@ -279,6 +281,65 @@ ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL],
esac
])
# AC_LIBTOOL_SYS_MAX_CMD_LEN
# --------------------------
AC_DEFUN([AC_LIBTOOL_SYS_MAX_CMD_LEN],
[# find the maximum length of command line arguments
AC_MSG_CHECKING([the maximum length of command line arguments])
AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl
i=0
teststring="ABCD"
case $build_os in
msdosdjgpp*)
# On DJGPP, this test can blow up pretty badly due to problems in libc
# (any single argument exceeding 2000 bytes causes a buffer overrun
# during glob expansion). Even if it were fixed, the result of this
# check would be larger than it should be.
lt_cv_sys_max_cmd_len=12288; # 12K is about right
;;
cygwin* | mingw*)
# On Win9x/ME, this test blows up -- it succeeds, but takes
# about 5 minutes as the teststring grows exponentially.
# Worse, since 9x/ME are not pre-emptively multitasking,
# you end up with a "frozen" computer, even though with patience
# the test eventually succeeds (with a max line length of 256k).
# Instead, let's just punt: use the minimum linelength reported by
# all of the supported platforms: 8192 (on NT/2K/XP).
lt_cv_sys_max_cmd_len=8192;
;;
amigaos*)
# On AmigaOS with pdksh, this test takes hours, literally.
# So we just punt and use a minimum line length of 8192.
lt_cv_sys_max_cmd_len=8192;
;;
netbsd* | freebsd* | openbsd* | darwin* | dragonfly*)
# This has been around since 386BSD, at least. Likely further.
if test -x /sbin/sysctl; then
lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax`
elif test -x /usr/sbin/sysctl; then
lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax`
else
lt_cv_sys_max_cmd_len=65536 # usable default for *BSD
fi
# And add a safety zone
lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
;;
esac
])
if test -n $lt_cv_sys_max_cmd_len ; then
AC_MSG_RESULT($lt_cv_sys_max_cmd_len)
else
AC_MSG_RESULT(none)
fi
])# AC_LIBTOOL_SYS_MAX_CMD_LEN
# AC_LIBTOOL_DLOPEN - enable checks for dlopen support
AC_DEFUN([AC_LIBTOOL_DLOPEN], [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])])