[[sec:building_an_executable]]
== Building an executable

To build a native executable, you define an executable component in the `components` container. The following sample defines an executable called `main`:

=== Example: Defining executable components

[source.multi-language-sample,groovy]
.build.gradle
----
include::{snippetsPath}/native-binaries/c/groovy/build.gradle[tag=executables]
----

            return JavaVersion.current();
        }
    }

    @Override
    public GradleExecuter usingExecutable(String script) {
        this.executable = script;
        return this;
    }

    public String getExecutable() {
        return executable;
    }

    @Override
    public GradleExecuter withStdinPipe() {
        return withStdinPipe(new PipedOutputStream());
    }

    @Override

def setup_python(environ_cp):
  """Setup python related env variables."""
  # Get PYTHON_BIN_PATH, default is the current running python.
  default_python_bin_path = sys.executable
  ask_python_bin_path = ('Please specify the location of python. [Default is '
                         '{}]: ').format(default_python_bin_path)
  while True:

	80:  "authentication error",
	81:  "need authenticator",
	82:  "device power is off",
	83:  "device error",
	84:  "value too large to be stored in data type",
	85:  "bad executable (or shared library)",
	86:  "bad CPU type in executable",
	87:  "shared library version mismatch",
	88:  "malformed Mach-o file",
	89:  "operation canceled",
	90:  "identifier removed",
	91:  "no message of desired type",

==== Configuring a non-existing executable now fails

When configuring an executable explicitly for link:{groovyDslPath}/org.gradle.api.tasks.compile.ForkOptions.html#org.gradle.api.tasks.compile.ForkOptions:executable[`JavaCompile`] or link:{groovyDslPath}/org.gradle.api.tasks.testing.Test.html#org.gradle.api.tasks.testing.Test:executable[`Test`] tasks, Gradle will now emit an error if this executable does not exist.

	80:  "authentication error",
	81:  "need authenticator",
	82:  "device power is off",
	83:  "device error",
	84:  "value too large to be stored in data type",
	85:  "bad executable (or shared library)",
	86:  "bad CPU type in executable",
	87:  "shared library version mismatch",
	88:  "malformed Mach-o file",
	89:  "operation canceled",
	90:  "identifier removed",
	91:  "no message of desired type",

# To learn more about import library (called interface library in Bazel):
#     https://docs.microsoft.com/en-us/cpp/build/linking-an-executable-to-a-dll?view=vs-2017#linking-implicitly
filegroup(
    name = "get_tensorflow_dll_import_lib",
    srcs = ["//tensorflow:tensorflow.dll"],
    output_group = "interface_library",

	// code generation.
	GenSymsLate func(*Link, *loader.Loader)

	// TLSIEtoLE converts a TLS Initial Executable relocation to
	// a TLS Local Executable relocation.
	//
	// This is possible when a TLS IE relocation refers to a local
	// symbol in an executable, which is typical when internally
	// linking PIE binaries.
	TLSIEtoLE func(P []byte, off, size int)

	{82, "EPWROFF", "device power is off"},
	{83, "EDEVERR", "device error"},
	{84, "EOVERFLOW", "value too large to be stored in data type"},
	{85, "EBADEXEC", "bad executable (or shared library)"},
	{86, "EBADARCH", "bad CPU type in executable"},
	{87, "ESHLIBVERS", "shared library version mismatch"},
	{88, "EBADMACHO", "malformed Mach-o file"},
	{89, "ECANCELED", "operation canceled"},

	{82, "EPWROFF", "device power is off"},
	{83, "EDEVERR", "device error"},
	{84, "EOVERFLOW", "value too large to be stored in data type"},
	{85, "EBADEXEC", "bad executable (or shared library)"},
	{86, "EBADARCH", "bad CPU type in executable"},
	{87, "ESHLIBVERS", "shared library version mismatch"},
	{88, "EBADMACHO", "malformed Mach-o file"},
	{89, "ECANCELED", "operation canceled"},