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# AVR_CHECK_FOR_ZLIB(msg, root_path, lib_ext)
AC_DEFUN([AVR_CHECK_FOR_ZLIB], [
if test x"$zlib_a_location" = "x"; then
AC_MSG_CHECKING($1 $2 in "$3")
zlib_a_location=$2/$3
if test -f ${zlib_a_location}/libz.a ; then
AC_MSG_RESULT(yes)
zlib_root_location="$2"
else
AC_MSG_RESULT(no)
zlib_a_location=""
fi
fi
])
# AVR_ZLIB_SEARCH_STEP(root_path)
AC_DEFUN([AVR_ZLIB_SEARCH_STEP], [
AVR_CHECK_FOR_ZLIB([zlib: search],[$1],[lib])
])
# AVR_CHECK_ZLIB_MSYS()
# set make variable LIBZ_FLAGS
AC_DEFUN([AVR_CHECK_ZLIB_MSYS], [
# configure option to define the right path for zlib
AC_ARG_WITH([zlib],
[AS_HELP_STRING([--with-zlib=path location of zlib on MSYS/MingW where lib/libz.a is found])],
[],
[with_zlib=check])
AC_MSG_RESULT([with_zlib = $with_zlib])
# seek for the lib
if test "${with_zlib}" != "check"; then
AVR_ZLIB_SEARCH_STEP($with_zlib)
else
AVR_ZLIB_SEARCH_STEP(/usr)
fi
# set variables for make
AC_SUBST([LIBZ_FLAGS], ["-L${zlib_root_location}/lib -lz"])
])
# EOF
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