Use pkg-config to detect libpcsclite.

Test the presence of libpcsclite, libpkcs11-helper-1, opensc-pkcs11
and libcryptsetup only if the tdehw library is built.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

CMakeLists.txt

@@ -756,7 +756,9 @@ endif( WITH_LZMA )
 
 ##### check for pcsc ############################
 
-if( WITH_PCSC )
+if( WITH_TDEHWLIB AND WITH_PCSC )
+  pkg_search_module( PCSCLITE libpcsclite )
+  if( NOT PCSCLITE_FOUND )
     find_path( PCSCLITE_INCLUDE_DIR pcsclite.h
       HINTS /usr/include/PCSC )
     find_library( PCSCLITE_LIBRARY NAMES pcsclite libpcsclite PCSC )
@@ -766,16 +768,17 @@ if( WITH_PCSC )
       set( PCSCLITE_INCLUDE_DIRS ${PCSCLITE_INCLUDE_DIR} )
       set( PCSCLITE_LIBRARIES ${PCSCLITE_LIBRARY} )
     endif( PCSCLITE_LIBRARY AND PCSCLITE_INCLUDE_DIR )
+  endif( NOT PCSCLITE_FOUND )
   if( NOT PCSCLITE_FOUND )
     tde_message_fatal( "PCSCLITE is requested, but not found on your system" )
   endif( NOT PCSCLITE_FOUND )
   set( HAVE_PCSC_SUPPORT 1 )
-endif( WITH_PCSC )
+endif( WITH_TDEHWLIB AND WITH_PCSC )
 
 
 ##### check for pkcs ############################
 
-if( WITH_PKCS )
+if( WITH_TDEHWLIB AND WITH_PKCS )
   pkg_search_module( LIBPKCS11-HELPER libpkcs11-helper-1 )
   if( NOT LIBPKCS11-HELPER_FOUND )
       message(FATAL_ERROR "\nPKCS support was requested, but libpkcs11-helper-1 was not found on your system" )
@@ -797,7 +800,7 @@ endif( )
 
 ##### check for pkcs ############################
 
-if( WITH_CRYPTSETUP )
+if( WITH_TDEHWLIB AND WITH_CRYPTSETUP )
   pkg_search_module( LIBCRYPTSETUP libcryptsetup )
   if( NOT LIBCRYPTSETUP_FOUND )
     find_library( LIBCRYPTSETUP_LIBRARY cryptsetup )