mirror/autoconf
2
0
Fork 0
mirror of git://git.sv.gnu.org/autoconf synced 2024-11-27 01:49:56 +08:00
Code Issues Packages Projects Releases Wiki Activity

(_AS_LINENO_WORKS): New macro.

Browse Source 
(_AS_LINENO_PREPARE): Use it instead of shell eval, since
eval $LINENO is not portable in practice.
This commit is contained in:
Paul Eggert 2001-10-26 19:52:43 +00:00
parent 34d266fd69
commit a4cb525873
1 changed files with 14 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
lib/m4sugar/m4sh.m4
View File

@ -459,6 +459,17 @@ else
fi
])# _AS_EXPR_PREPARE
# _AS_LINENO_WORKS
# ---------------
# Succeed if the currently executing shell supports LINENO.
m4_define([_AS_LINENO_WORKS],
[{
as_lineno_1=$LINENO
as_lineno_2=$LINENO
as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
test "x$as_lineno_1" != "x$as_lineno_2" &&
test "x$as_lineno_3" = "x$as_lineno_2"
}])
# _AS_LINENO_PREPARE
# ------------------
@ -473,16 +484,7 @@ fi
# it protects us from repetitive rewrites. Be sure to have a test
# that does detect non LINENO support...
m4_define([_AS_LINENO_PREPARE],
[as_command='
as_lineno_1=$LINENO
as_lineno_2=$LINENO
as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
test "x$as_lineno_1" != "x$as_lineno_2" &&
test "x$as_lineno_3" = "x$as_lineno_2"
'
if eval "$as_command"; then
:
else
[_AS_LINENO_WORKS || {
# Find who we are. Look in the path if we contain no path at all
# relative or not.
case $[0] in
@ -505,7 +507,7 @@ else
[for as_base in sh bash ksh sh5; do
case $as_dir in
/*)
if ("$as_dir/$as_base" -c "$as_command") 2>/dev/null; then
if ("$as_dir/$as_base" -c '_AS_LINENO_WORKS') 2>/dev/null; then
CONFIG_SHELL=$as_dir/$as_base
export CONFIG_SHELL
exec "$CONFIG_SHELL" "$[0]" ${1+"$[@]"}
@ -533,7 +535,7 @@ else
. ./$as_me.lineno
# Exit status is that of the last command.
exit
fi
}
])# _AS_LINENO_PREPARE