[DO-971] ffmpeg recipe with requirements (!9)

Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>
Reviewed-on: https://git.avroid.tech/Conan/conan_build/pulls/9

recipes/libcap/all/conanfile.py

@@ -0,0 +1,104 @@
+import os
+
+from conan import ConanFile
+from conan.errors import ConanInvalidConfiguration
+from conan.tools.build import cross_building
+from conan.tools.files import apply_conandata_patches, copy, chdir, export_conandata_patches, get, rmdir
+from conan.tools.gnu import Autotools, AutotoolsToolchain
+from conan.tools.layout import basic_layout
+
+required_conan_version = ">=1.53.0"
+
+
+class LibcapConan(ConanFile):
+    name = "libcap"
+    license = ("GPL-2.0-only", "BSD-3-Clause")
+    url = "https://github.com/conan-io/conan-center-index"
+    homepage = "https://git.kernel.org/pub/scm/libs/libcap/libcap.git"
+    description = "This is a library for getting and setting POSIX.1e" \
+                  " (formerly POSIX 6) draft 15 capabilities"
+    topics = ("capabilities")
+    settings = "os", "arch", "compiler", "build_type"
+    options = {
+        "shared": [True, False],
+        "fPIC": [True, False],
+        "psx_syscals": [True, False],
+    }
+    default_options = {
+        "shared": False,
+        "fPIC": True,
+        "psx_syscals": False,
+    }
+
+    def export_sources(self):
+        export_conandata_patches(self)
+
+    def configure(self):
+        if self.options.shared:
+            self.options.rm_safe("fPIC")
+        self.settings.rm_safe("compiler.libcxx")
+        self.settings.rm_safe("compiler.cppstd")
+
+    def layout(self):
+        basic_layout(self, src_folder="src")
+
+    def validate(self):
+        if self.settings.os != "Linux":
+            raise ConanInvalidConfiguration(f"{self.name} only supports Linux")
+
+    def source(self):
+        get(self, **self.conan_data["sources"][self.version], strip_root=True)
+
+    def generate(self):
+        tc = AutotoolsToolchain(self)
+        tc.fpic = self.options.get_safe("fPIC", True)
+        env = tc.environment()
+        env.define("SHARED", "yes" if self.options.shared else "no")
+        env.define("PTHREADS", "yes" if self.options.psx_syscals else "no")
+        env.define("DESTDIR", self.package_folder)
+        env.define("prefix", "/")
+        env.define("lib", "lib")
+
+        if cross_building(self):
+            # libcap needs to run an executable that is compiled from sources
+            # during the build - so it needs a native compiler (it doesn't matter which)
+            # Assume the `cc` command points to a working C compiler
+            env.define("BUILD_CC", "cc")
+
+        tc.generate(env)
+
+    def build(self):
+        apply_conandata_patches(self)
+
+        autotools = Autotools(self)
+        with chdir(self, os.path.join(self.source_folder, "libcap")):
+            autotools.make()
+
+    def package(self):
+        copy(self, "License", self.source_folder, os.path.join(self.package_folder, "licenses"))
+
+        autotools = Autotools(self)
+        with chdir(self, os.path.join(self.source_folder, "libcap")):
+            autotools.make(target="install-common-cap")
+            install_cap = ("install-shared-cap" if self.options.shared
+                           else "install-static-cap")
+            autotools.make(target=install_cap)
+
+            if self.options.psx_syscals:
+                autotools.make(target="install-common-psx")
+                install_psx = ("install-shared-psx" if self.options.shared
+                               else "install-static-psx")
+                autotools.make(target=install_psx)
+
+        rmdir(self, os.path.join(self.package_folder, "lib", "pkgconfig"))
+
+    def package_info(self):
+        self.cpp_info.components["cap"].set_property("pkg_config_name", "libcap")
+        self.cpp_info.components["cap"].libs = ["cap"]
+        if self.options.psx_syscals:
+            self.cpp_info.components["psx"].set_property("pkg_config_name", "libpsx")
+            self.cpp_info.components["psx"].libs = ["psx"]
+            self.cpp_info.components["psx"].system_libs = ["pthread"]
+            self.cpp_info.components["psx"].exelinkflags = ["-Wl,-wrap,pthread_create"]
+            # trick to avoid conflicts with cap component
+            self.cpp_info.set_property("pkg_config_name", "libcap-do-not-use")