Commit dc37d1c56b for qemu.org

commit dc37d1c56b87c6f4bc354d07791c9e69549e1524
Author: Philippe Mathieu-Daudé <philmd@linaro.org>
Date:   Thu May 2 11:56:42 2024 +0200

    crypto: Allow building with GnuTLS but without Libtasn1

    We only use Libtasn1 in unit tests. As noted in commit d47b83b118
    ("tests: add migration tests of TLS with x509 credentials"), having
    GnuTLS without Libtasn1 is a valid configuration, so do not require
    Libtasn1, to avoid:

      Dependency gnutls found: YES 3.7.1 (cached)
      Run-time dependency libtasn1 found: NO (tried pkgconfig)

      ../meson.build:1914:10: ERROR: Dependency "libtasn1" not found, tried pkgconfig

    Fixes: ba7ed407e6 ("configure, meson: convert libtasn1 detection to meson")
    Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
    Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
    Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/meson.build b/meson.build
index af9f0380e2..4eca361319 100644
--- a/meson.build
+++ b/meson.build
@@ -1979,6 +1979,7 @@ endif
 tasn1 = not_found
 if gnutls.found()
   tasn1 = dependency('libtasn1',
+                     required: false,
                      method: 'pkg-config')
 endif
 keyutils = not_found