1AC_DEFUN([PDNS_WITH_LIBSODIUM], [
2  AC_MSG_CHECKING([whether we will be linking in libsodium])
3  AC_ARG_WITH([libsodium],
4    AS_HELP_STRING([--with-libsodium],[use libsodium @<:@default=auto@:>@]),
5    [with_libsodium=$withval],
6    [with_libsodium=auto],
7  )
8  AC_MSG_RESULT([$with_libsodium])
9
10  AS_IF([test "x$with_libsodium" != "xno"], [
11    AS_IF([test "x$with_libsodium" = "xyes" -o "x$with_libsodium" = "xauto"], [
12      PKG_CHECK_MODULES([LIBSODIUM], [libsodium], [
13        AC_DEFINE([HAVE_LIBSODIUM], [1], [Define to 1 if you have libsodium])
14        save_CFLAGS=$CFLAGS
15        save_LIBS=$LIBS
16        CFLAGS="$LIBSODIUM_CFLAGS $CFLAGS"
17        LIBS="$LIBSODIUM_LIBS $LIBS"
18        AC_CHECK_FUNCS([crypto_box_easy_afternm crypto_box_curve25519xchacha20poly1305_easy randombytes_stir])
19        CFLAGS=$save_CFLAGS
20        LIBS=$save_LIBS
21      ], [ : ])
22    ])
23  ])
24  AM_CONDITIONAL([LIBSODIUM], [test "x$LIBSODIUM_LIBS" != "x"])
25  AS_IF([test "x$with_libsodium" = "xyes"], [
26    AS_IF([test x"$LIBSODIUM_LIBS" = "x"], [
27      AC_MSG_ERROR([libsodium requested but libraries were not found])
28    ])
29  ])
30])
31