CUPS printing: Define CUPS_PRINTER_SCANNER for Linux if CUPS is < 1.4

printing/backend/print_backend_cups.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/backend/print_backend.h"
 
 #include "build/build_config.h"
 
 #include <dlfcn.h>
 #include <errno.h>
 #include <pthread.h>
 
 #if defined(OS_MACOSX)
 #include <AvailabilityMacros.h>
 #else
 #include <gcrypt.h>
 #endif
 
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/values.h"
 #include "googleurl/src/gurl.h"
 #include "printing/backend/cups_helper.h"
 #include "printing/backend/print_backend_consts.h"
 
-#if defined(OS_MACOSX)
-#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_5
+#if (defined(OS_MACOSX) && \
+     MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_5) || \
+    (defined(OS_LINUX) && \
+     CUPS_VERSION_MAJOR == 1 && CUPS_VERSION_MINOR < 4)
 const int CUPS_PRINTER_SCANNER = 0x2000000;  // Scanner-only device
-#endif  // MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_5
-#else
+#endif
+
+#if !defined(OS_MACOSX)
 GCRY_THREAD_OPTION_PTHREAD_IMPL;
 
 namespace {
 
 // Init GCrypt library (needed for CUPS) using pthreads.
 // There exists a bug in CUPS library, where it crashed with: "ath.c:184:
 // _gcry_ath_mutex_lock: Assertion `*lock == ((ath_mutex_t) 0)' failed."
 // It happened when multiple threads tried printing simultaneously.
 // Google search for 'gnutls thread safety' provided a solution that
 // initialized gcrypt and gnutls.
@@ skipping 29 matching lines @@
     }
     if ((*pgnutls_global_init)() != 0)
       LOG(ERROR) << "Gnutls initialization failed";
   }
 };
 
 static base::LazyInstance<GcryptInitializer> g_gcrypt_initializer(
     base::LINKER_INITIALIZED);
 
 }  // namespace
-#endif  // defined(OS_MACOSX)
+#endif  // !defined(OS_MACOSX)
 
 namespace printing {
 
 static const char kCUPSPrinterInfoOpt[] = "printer-info";
 static const char kCUPSPrinterStateOpt[] = "printer-state";
 static const char kCUPSPrinterTypeOpt[] = "printer-type";
 
 class PrintBackendCUPS : public PrintBackend {
  public:
   PrintBackendCUPS(const GURL& print_server_url, bool blocking);
@@ skipping 204 matching lines @@
                    << ", HTTP error: " << http_error;
         file_util::Delete(ppd_path, false);
         ppd_path.clear();
       }
     }
   }
   return ppd_path;
 }
 
 }  // namespace printing