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asterisk/autoconf/ast_ext_lib.m4

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# Helper function to setup variables for a package.
# $1 -> the package name. Used in configure.ac and also as a prefix
# for the variables ($1_DIR, $1_INCLUDE, $1_LIB) in makeopts
# $3 -> option name, used in --with-$3 or --without-$3 when calling configure.
# $2 and $4 are just text describing the package (short and long form)
# AST_EXT_LIB_SETUP([package], [short description], [configure option name], [long description])
AC_DEFUN([AST_EXT_LIB_SETUP],
[
$1_DESCRIP="$2"
$1_OPTION="$3"
PBX_$1=0
AC_ARG_WITH([$3], AC_HELP_STRING([--with-$3=PATH],[use $2 files in PATH$4]),
[
case ${withval} in
n|no)
USE_$1=no
# -1 is a magic value used by menuselect to know that the package
# was disabled, other than 'not found'
PBX_$1=-1
;;
y|ye|yes)
ac_mandatory_list="${ac_mandatory_list} $1"
;;
*)
$1_DIR="${withval}"
ac_mandatory_list="${ac_mandatory_list} $1"
;;
esac
])
AC_SUBST([$1_LIB])
AC_SUBST([$1_INCLUDE])
AC_SUBST([$1_DIR])
AC_SUBST([PBX_$1])
])
# Check for existence of a given package ($1), either looking up a function
# in a library, or, if no function is supplied, only check for the
# existence of the header files.
# AST_EXT_LIB_CHECK([package], [library], [function], [header],
# [extra libs], [extra cflags], [version])
AC_DEFUN([AST_EXT_LIB_CHECK],
[
if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
pbxlibdir=""
# if --with-$1=DIR has been specified, use it.
if test "x${$1_DIR}" != "x"; then
if test -d ${$1_DIR}/lib; then
pbxlibdir="-L${$1_DIR}/lib"
else
pbxlibdir="-L${$1_DIR}"
fi
fi
pbxfuncname="$3"
if test "x${pbxfuncname}" = "x" ; then # empty lib, assume only headers
AST_$1_FOUND=yes
else
AC_CHECK_LIB([$2], [${pbxfuncname}], [AST_$1_FOUND=yes], [AST_$1_FOUND=no], ${pbxlibdir} $5)
fi
# now check for the header.
if test "${AST_$1_FOUND}" = "yes"; then
$1_LIB="${pbxlibdir} -l$2 $5"
# if --with-$1=DIR has been specified, use it.
if test "x${$1_DIR}" != "x"; then
$1_INCLUDE="-I${$1_DIR}/include"
fi
$1_INCLUDE="${$1_INCLUDE} $6"
if test "x$4" = "x" ; then # no header, assume found
$1_HEADER_FOUND="1"
else # check for the header
saved_cppflags="${CPPFLAGS}"
CPPFLAGS="${CPPFLAGS} ${$1_INCLUDE}"
AC_CHECK_HEADER([$4], [$1_HEADER_FOUND=1], [$1_HEADER_FOUND=0])
CPPFLAGS="${saved_cppflags}"
fi
if test "x${$1_HEADER_FOUND}" = "x0" ; then
$1_LIB=""
$1_INCLUDE=""
else
if test "x${pbxfuncname}" = "x" ; then # only checking headers -> no library
$1_LIB=""
fi
PBX_$1=1
# XXX don't know how to evaluate the description (third argument) in AC_DEFINE_UNQUOTED
AC_DEFINE_UNQUOTED([HAVE_$1], 1, [Define this to indicate the ${$1_DESCRIP} library])
AC_DEFINE_UNQUOTED([HAVE_$1_VERSION], [$7], [Define to indicate the ${$1_DESCRIP} library version])
fi
fi
fi
])