}
	}

	chain := [][]*Certificate{{}}
	numCerts := macOS.SecTrustGetCertificateCount(trustObj)
	for i := 0; i < numCerts; i++ {
		certRef, err := macOS.SecTrustGetCertificateAtIndex(trustObj, i)
		if err != nil {
			return nil, err
		}
		cert, err := exportCertificate(certRef)
		if err != nil {
			return nil, err
		}
		chain[0] = append(chain[0], cert)
	}
	if len(chain[0]) == 0 {

The tool chain and runtime also have regular Go tests in their packages.
The main reasons to add a new test to this directory are:

* it is most naturally expressed using the test runner; or

Jacek Ewertowski <******@****.***> 1666353045 +0200

  - Tool chain 'clang' (Clang):
      - Could not find C++ compiler 'clang++'. Searched in:
          - ${file('clang-bin')}""")
        } else {
            failure.assertHasCause("""No tool chain is available to build C++ for host operating system '${osName}' architecture '${archName}':
  - Tool chain 'visualCpp' (Visual Studio):
      - Visual Studio is not available on this operating system.
  - Tool chain 'gcc' (GNU GCC):

Oliver Liu <******@****.***> 1523299220 -0700

Tao Li <******@****.***> 1518720412 -0800

.build.gradle
----
include::{snippetsPath}/native-binaries/tool-chains/groovy/build.gradle[tag=buildable]
----


[[native_binaries:tool_chain]]
== Tool chains

  // CHECK-NEXT: [[out_ch:%.*]] = tfrt.merge.chains [[ch]], [[ch1]] : !tfrt.chain, !tfrt.chain
  // CHECK-NEXT: tfrt.return [[out_ch]], [[r2]] : !tfrt.chain, !tfrt_fallback.tf_tensor
  func.return %6#0 : tensor<3x3xf32>
}

        fails("assemble")

        then:
        failure.assertHasDescription("Execution failed for task ':compileDebugSwift'.")
        failure.assertHasCause("""No tool chain is available to build Swift for host operating system '${osName}' architecture '${archName}':
  - Tool chain 'swiftc' (Swift Compiler):
      - Could not find Swift compiler 'swiftc'. Searched in:
          - ${file('swift-bin')}""")
    }

// CHECK-NEXT: [[out_chain:%.*]] = tfrt.merge.chains [[o2_chain]], [[o3_chain]], [[o4_chain]], [[o5_chain]]
// CHECK-NEXT: tfrt.return [[out_chain]], [[o9]], [[o5]], [[o8]], [[o6]], [[arg1]], [[o3]] : !tfrt.chain, !tfrt_fallback.tf_tensor, !tfrt_fallback.tf_tensor, !tfrt_fallback.tf_tensor, !tfrt_fallback.tf_tensor, !tfrt_fallback.tf_tensor, !tfrt_fallback.tf_tensor