CMake: Check for libgcrypt availability.

CMakeLists.txt

@@ -19,6 +19,7 @@ find_package(SDL)
 find_package(GnuTLS)
 find_package(Threads)
 find_package(X11)
+find_library(LIBGCRYPT_LIBRARIES gcrypt)
 
 if(Threads_FOUND)
   option(TIGHTVNC_FILETRANSFER "Enable filetransfer" ON)
@@ -33,6 +34,11 @@ option(LIBVNCSERVER_ALLOW24BPP "Allow 24 bpp" ON)
 if(GNUTLS_FOUND)
   set(LIBVNCSERVER_WITH_CLIENT_TLS 1)
 endif(GNUTLS_FOUND)
+if(LIBGCRYPT_LIBRARIES)
+  message(STATUS "Found libgcrypt: ${LIBGCRYPT_LIBRARIES}")
+  set(LIBVNCSERVER_WITH_CLIENT_GCRYPT 1)
+endif(LIBGCRYPT_LIBRARIES)
+
 
 check_include_file("fcntl.h"       LIBVNCSERVER_HAVE_FCNTL_H)
 check_include_file("netinet/in.h"  LIBVNCSERVER_HAVE_NETINET_IN_H)

rfb/rfbconfig.h.cmake

@@ -54,6 +54,9 @@
 /* Define to the version of this package. */
 #define LIBVNCSERVER_PACKAGE_VERSION  "@PACKAGE_VERSION@"
 
+/* Define to 1 if libgcrypt is present */
+#cmakedefine LIBVNCSERVER_WITH_CLIENT_GCRYPT 1
+
 /* Define to 1 if GnuTLS is present */
 #cmakedefine LIBVNCSERVER_WITH_CLIENT_TLS 1