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# dnscrypt.m4

# dnsc_DNSCRYPT([action-if-true], [action-if-false])

# --------------------------------------------------------------------------

# Check for required dnscrypt libraries and add dnscrypt configure args.

AC_DEFUN([dnsc_DNSCRYPT],

[

AC_ARG_ENABLE([dnscrypt],

AS_HELP_STRING([--enable-dnscrypt],

[Enable dnscrypt support (requires libsodium)]),

[opt_dnscrypt=$enableval], [opt_dnscrypt=no])

if test "x$opt_dnscrypt" != "xno"; then

AC_ARG_WITH([libsodium], AS_HELP_STRING([--with-libsodium=path],

[Path where libsodium is installed, for dnscrypt]), [

CFLAGS="$CFLAGS -I$withval/include"

LDFLAGS="$LDFLAGS -L$withval/lib"

])

AC_SEARCH_LIBS([sodium_init], [sodium], [],

AC_MSG_ERROR([The sodium library was not found. Please install sodium!]))

AC_SEARCH_LIBS([crypto_box_curve25519xchacha20poly1305_beforenm], [sodium],

[

AC_SUBST([ENABLE_DNSCRYPT_XCHACHA20], [1])

AC_DEFINE(

[USE_DNSCRYPT_XCHACHA20], [1],

[Define to 1 to enable dnscrypt with xchacha20 support])

],

[

AC_SUBST([ENABLE_DNSCRYPT_XCHACHA20], [0])

])

AC_SEARCH_LIBS([sodium_set_misuse_handler], [sodium],

[

AC_DEFINE(

[SODIUM_MISUSE_HANDLER], [1],

[Define to 1 if libsodium supports sodium_set_misuse_handler])

],

[

])

$1

else

AC_SUBST([ENABLE_DNSCRYPT_XCHACHA20], [0])

$2

fi

])