diff -ru libxslt-1.1.34.orig/configure.ac libxslt-1.1.34/configure.ac
--- libxslt-1.1.34.orig/configure.ac	2019-10-28 09:11:11.000000000 +0100
+++ libxslt-1.1.34/configure.ac	2020-09-26 17:08:16.822422567 +0200
@@ -329,17 +329,16 @@
     CRYPTO_TESTDIR=crypto
     ;;
   *)
-    AC_PATH_TOOL(LIBGCRYPT_CONFIG, libgcrypt-config, no)
-    if test "$LIBGCRYPT_CONFIG" != "no" ; then
-      LIBGCRYPT_VERSION=`$LIBGCRYPT_CONFIG --version`
+    if test "$PKG_CONFIG" != "no" ; then
+      LIBGCRYPT_VERSION=`$PKG_CONFIG --modver libgcrypt`
       if test VERSION_TO_NUMBER(echo $LIBGCRYPT_VERSION) -lt VERSION_TO_NUMBER(echo "1.1.42")
       then
         LIBGCRYPT_CFLAGS=""
         LIBGCRYPT_LIBS=""
         echo 'gcrypt library version < 1.1.42 - Crypto extensions will not be available.'
       else
-        LIBGCRYPT_CFLAGS=`$LIBGCRYPT_CONFIG $libgcrypt_config_args --cflags`
-        LIBGCRYPT_LIBS=`$LIBGCRYPT_CONFIG $libgcrypt_config_args --libs`
+        LIBGCRYPT_CFLAGS=`$PKG_CONFIG --cflags libgcrypt`
+        LIBGCRYPT_LIBS=`$PKG_CONFIG --libs libgcrypt`
         AC_DEFINE(HAVE_GCRYPT, 1, [Define if gcrypt library is available.])
         echo 'Crypto extensions will be available.'
         WITH_CRYPTO=1