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dnl -*- Autoconf -*- test for either zlib or bzlib.
dnl Defines --with-$1lib argument, $2LIB automake conditional,
dnl and sets AC_DEFINE(USE_$2LIB) and LIBS.
AC_DEFUN([eu_ZIPLIB], [dnl
AC_ARG_WITH([[$1]lib],
AC_HELP_STRING([--with-[$1]lib], [support g[$1]ip compression in libdwfl]),,
[with_[$1]lib=default])
if test $with_[$1]lib != no; then
AC_SEARCH_LIBS([$4], [$3], [with_[$1]lib=yes],
[test $with_[$1]lib = default ||
AC_MSG_ERROR([missing -l[$3] for --with-[$1]lib])])
fi
AM_CONDITIONAL([$2]LIB, test $with_[$1]lib = yes)
if test $with_[$1]lib = yes; then
AC_DEFINE(USE_[$2]LIB)
fi
AH_TEMPLATE(USE_[$2]LIB, [Support $5 decompression via -l$3.])])
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