diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | libtool.m4 | 52 |
2 files changed, 34 insertions, 23 deletions
@@ -1,3 +1,8 @@ +2007-06-01 Steve Ellcey <sje@cup.hp.com> + + * libltdl/m4/libtool.m4 (LT_CMD_MAX_LEN): Try using getconf + to set lt_cv_sys_max_cmd_len. + 2007-05-31 Paolo Bonzini <bonzini@gnu.org> * ltgcc.m4: Update from GCC. diff --git a/libtool.m4 b/libtool.m4 index 46d59635df..df40fe83e1 100644 --- a/libtool.m4 +++ b/libtool.m4 @@ -1439,29 +1439,35 @@ AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl fi ;; *) - # Make teststring a little bigger before we do anything with it. - # a 1K string should be a reasonable start. - for i in 1 2 3 4 5 6 7 8 ; do - teststring=$teststring$teststring - done - SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}} - # If test is not a shell built-in, we'll probably end up computing a - # maximum length that is only half of the actual maximum length, but - # we can't tell. - while { test "X"`$SHELL [$]0 --fallback-echo "X$teststring$teststring" 2>/dev/null` \ - = "XX$teststring$teststring"; } >/dev/null 2>&1 && - test $i != 17 # 1/2 MB should be enough - do - i=`expr $i + 1` - teststring=$teststring$teststring - done - # Only check the string length outside the loop. - lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1` - teststring= - # Add a significant safety factor because C++ compilers can tack on massive - # amounts of additional arguments before passing them to the linker. - # It appears as though 1/2 is a usable value. - lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2` + lt_cv_sys_max_cmd_len=`getconf ARG_MAX 2> /dev/null` + if test -n $lt_cv_sys_max_cmd_len; then + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` + else + # Make teststring a little bigger before we do anything with it. + # a 1K string should be a reasonable start. + for i in 1 2 3 4 5 6 7 8 ; do + teststring=$teststring$teststring + done + SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}} + # If test is not a shell built-in, we'll probably end up computing a + # maximum length that is only half of the actual maximum length, but + # we can't tell. + while { test "X"`$SHELL [$]0 --fallback-echo "X$teststring$teststring" 2>/dev/null` \ + = "XX$teststring$teststring"; } >/dev/null 2>&1 && + test $i != 17 # 1/2 MB should be enough + do + i=`expr $i + 1` + teststring=$teststring$teststring + done + # Only check the string length outside the loop. + lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1` + teststring= + # Add a significant safety factor because C++ compilers can tack on + # massive amounts of additional arguments before passing them to the + # linker. It appears as though 1/2 is a usable value. + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2` + fi ;; esac ]) |