add recipe for Apple libdispatch (aka Grand Central Dispatch)

recipes/libdispatch/all/CMakeLists.txt

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+cmake_minimum_required(VERSION 2.8.11)
+project(cmake_wrapper)
+
+include(conanbuildinfo.cmake)
+conan_basic_setup()
+
+add_subdirectory("source_subfolder")

recipes/libdispatch/all/conandata.yml

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+sources:
+  "5.3.2":
+    sha256: d18ad8f24e3461108d8e2e0c838c8fca671f808ab8d06a2c32a7065f321995a1
+    url: https://github.com/apple/swift-corelibs-libdispatch/archive/swift-5.3.2-RELEASE.tar.gz

recipes/libdispatch/all/conanfile.py

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+from conans import ConanFile, CMake, tools
+from conans.errors import ConanInvalidConfiguration
+import os
+
+required_conan_version = ">=1.32.0"
+
+class LibDispatchConan(ConanFile):
+    name = "libdispatch"
+    homepage = "https://github.com/apple/swift-corelibs-libdispatch"
+    description = "Grand Central Dispatch (GCD or libdispatch) provides comprehensive support for concurrent code execution on multicore hardware.."
+    topics = ("conan", "libdispatch", "apple", "GCD", "concurrency")
+    url = "https://github.com/conan-io/conan-center-index"
+    license = "Apache-2.0"
+    exports_sources = ["CMakeLists.txt"]
+    generators = "cmake"
+    settings = "os", "compiler", "build_type", "arch"
+
+    options = {"shared": [True, False], "fPIC": [True, False]}
+    default_options = {"shared": False, "fPIC": True}
+
+    _cmake = None
+
+    def validate(self):
+        if self.settings.build_type != "Release":
+            raise ConanInvalidConfiguration("Just Release builds allowed.")
+
+        if self.settings.compiler != "clang":
+            raise ConanInvalidConfiguration("Clang compiler is required.")
+
+    @property
+    def _source_subfolder(self):
+        return "source_subfolder"
+
+    @property
+    def _build_subfolder(self):
+        return "build_subfolder"
+
+    def source(self):
+        tools.get(**self.conan_data["sources"][self.version])
+        extracted_dir = "swift-corelibs-{}-swift-{}-RELEASE".format(self.name, self.version)
+
+        os.rename(extracted_dir, self._source_subfolder)
+
+    def _configure_cmake(self):
+        if self._cmake:
+            return self._cmake
+        self._cmake = CMake(self)
+        self._cmake.configure(build_folder=self._build_subfolder)
+        return self._cmake
+
+    def build(self):
+        cmake = self._configure_cmake()
+        cmake.build()
+
+    def package(self):
+        self.copy("LICENSE", dst="licenses", src=self._source_subfolder)
+        cmake = self._configure_cmake()
+        cmake.install()
+        tools.rmdir(os.path.join(self.package_folder, "share"))
+
+    def package_info(self):
+        self.cpp_info.libs = tools.collect_libs(self)
+        if self.settings.os == "Linux":
+            self.cpp_info.system_libs = ["pthread"]

recipes/libdispatch/all/test_package/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.1.2)
+project(test_package CXX)
+
+include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
+conan_basic_setup()
+
+find_package(libdispatch REQUIRED)
+
+# TEST_PACKAGE #################################################################
+add_executable(${CMAKE_PROJECT_NAME} test_package.cpp)
+set_property(TARGET ${CMAKE_PROJECT_NAME} PROPERTY CXX_STANDARD 14)
+target_link_libraries(${CMAKE_PROJECT_NAME} libdispatch::libdispatch)

recipes/libdispatch/all/test_package/conanfile.py

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+import os
+from conans import ConanFile, CMake, tools
+
+
+class TestPackageConan(ConanFile):
+    settings = "os", "compiler", "build_type", "arch"
+    generators = "cmake_find_package", "cmake"
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if not tools.cross_building(self.settings):
+            self.run(os.path.join("bin","test_package"), run_environment=True)

recipes/libdispatch/all/test_package/test_package.cpp

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+#include <dispatch/dispatch.h>
+
+int main() {
+	dispatch_queue_t main_q = dispatch_get_main_queue();
+	return 0;
+}

recipes/libdispatch/config.yml

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+versions:
+  "5.3.2":
+    folder: all