Allow to overwrite gcrypt PBKDF2 use for configure.

diff --git a/configure.ac b/configure.ac
index 1286cf9..f69c011 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -117,7 +117,9 @@ AC_DEFUN([CONFIGURE_GCRYPT], [
                GCRYPT_REQ_VERSION=1.1.42
        fi
        dnl Check if we can use gcrypt PBKDF2 (1.6.0 supports empty password)
-       AM_PATH_LIBGCRYPT([1.6.0], [use_internal_pbkdf2=0], [use_internal_pbkdf2=1])
+       AC_ARG_ENABLE([gcrypt-pbkdf2], AS_HELP_STRING([--enable-gcrypt-pbkdf2],[force enable internal gcrypt PBKDF2]),
+               [use_internal_pbkdf2=0],
+               [AM_PATH_LIBGCRYPT([1.6.0], [use_internal_pbkdf2=0], [use_internal_pbkdf2=1])])
        AM_PATH_LIBGCRYPT($GCRYPT_REQ_VERSION,,[AC_MSG_ERROR([You need the gcrypt library.])])
 
        if test x$enable_static_cryptsetup = xyes; then