* The upstream tests for libgcrypt are awkward and not working.
  - Requires libgcrypt-config, which seems broken?
* AM_PATH_LIBGCRYPT exists for a reason, why not use it? KISS.
* Upstream abandoned AM_PATH_LIBGCRYPT in the past...newer automake ok?

Upstream status: Pending

Index: vlc-2.2.1/configure.ac
===================================================================
--- vlc-2.2.1.orig/configure.ac
+++ vlc-2.2.1/configure.ac
@@ -4017,25 +4017,19 @@ PKG_ENABLE_MODULES_VLC([LIBXML2], [xml],
 dnl
 dnl libgcrypt
 dnl
+GCRYPT_LIBVER=1
+GCRYPT_REQ=1.1.94
 AC_ARG_ENABLE(libgcrypt,
   [  --disable-libgcrypt     gcrypt support (default enabled)])
 AS_IF([test "${enable_libgcrypt}" != "no"], [
-  AC_CHECK_DECL([GCRYCTL_SET_THREAD_CBS], [
-    libgcrypt-config --version >/dev/null || \
-        AC_MSG_ERROR([gcrypt.h present but libgcrypt-config could not be found])
-    AC_CHECK_LIB(gcrypt, gcry_control, [
-      have_libgcrypt="yes"
-      GCRYPT_CFLAGS="`libgcrypt-config --cflags`"
-      GCRYPT_LIBS="`libgcrypt-config --libs`"
-    ], [
-      AC_MSG_ERROR([libgcrypt not found. Install libgcrypt or pass --disable-libgcrypt.])
-    ], [`libgcrypt-config --libs`])
-  ], [
-    AC_MSG_ERROR([libgcrypt version 1.1.94 or higher not found. Install libgcrypt or pass --disable-libgcrypt.])
-  ], [#include <gcrypt.h>]
-  )
+      AM_PATH_LIBGCRYPT($GCRYPT_LIBVER:$GCRYPT_REQ,
+      [
+          GCRYPT_CFLAGS="$LIBGCRYPT_CFLAGS"
+          GCRYPT_LIBS="$LIBGCRYPT_LIBS"
+      ],[
+          AC_MSG_ERROR([libgcrypt version 1.1.94 or higher not found. Install libgcrypt or use --disable-libgcrypt. Have a nice day.])
+      ])
 ])
-
 AC_SUBST(GCRYPT_CFLAGS)
 AC_SUBST(GCRYPT_LIBS)
 AM_CONDITIONAL([HAVE_GCRYPT], [test "${have_libgcrypt}" = "yes"])