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acinclude: fix variable expansion issues

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Origin commit data
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Branch: master
Commit: 2b23273b0e
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2013-05-10 (Fri, 10 May 2013)


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Stefan Seyfried
2013-05-10 13:22:27 +02:00
parent fbb281e681
commit 211e79cccf
1 changed files with 16 additions and 4 deletions
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20
acinclude.m4
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@@ -57,21 +57,33 @@ check_path () {
]) ])
dnl expand nested ${foo}/bar
AC_DEFUN([TUXBOX_EXPAND_VARIABLE],[__$1="$2"
for __CNT in false false false false true; do dnl max 5 levels of indirection
$1=`eval echo "$__$1"`
echo ${$1} | grep -q '\$' || break # 'grep -q' is POSIX, exit if no $ in variable
__$1="${$1}"
done
$__CNT && AC_MSG_ERROR([can't expand variable $1=$2]) dnl bail out if we did not expand
])
AC_DEFUN([TUXBOX_APPS_DIRECTORY_ONE],[ AC_DEFUN([TUXBOX_APPS_DIRECTORY_ONE],[
AC_ARG_WITH($1,[ $6$7 [[PREFIX$4$5]]],[ AC_ARG_WITH($1,[ $6$7 [[PREFIX$4$5]]],[
_$2=$withval _$2=$withval
if test "$TARGET" = "cdk"; then if test "$TARGET" = "cdk"; then
$2=`eval echo "${targetprefix}$withval"` $2=`eval echo "${targetprefix}$withval"` # no indirection possible IMNSHO
else else
$2=$withval $2=$withval
fi fi
TARGET_$2=${$2} TARGET_$2=${$2}
],[ ],[
$2="\${$3}$5" # RFC 1925: "you can always add another level of indirection..."
TUXBOX_EXPAND_VARIABLE($2,"${$3}$5")
if test "$TARGET" = "cdk"; then if test "$TARGET" = "cdk"; then
_$2=`eval echo "${target$3}$5"` TUXBOX_EXPAND_VARIABLE(_$2,"${target$3}$5")
else else
_$2=`eval echo "${$3}$5"` _$2=${$2}
fi fi
TARGET_$2=$_$2 TARGET_$2=$_$2
]) ])