[c-ares] Fix cross building

recipes/c-ares/all/conandata.yml

@@ -11,3 +11,7 @@ sources:
   "1.14.0":
     sha256: 62dd12f0557918f89ad6f5b759f0bf4727174ae9979499f5452c02be38d9d3e8
     url: https://github.com/c-ares/c-ares/archive/cares-1_14_0.tar.gz
+patches:
+  "1.14.0":
+    - patch_file: "patches/option-tools.patch"
+      base_path: "source_subfolder"

recipes/c-ares/all/conanfile.py

@@ -12,9 +12,17 @@ class CAresConan(ConanFile):
     topics = ("conan", "c-ares", "dns")
     homepage = "https://c-ares.haxx.se/"
     settings = "os", "compiler", "build_type", "arch"
-    options = {"shared": [True, False], "fPIC": [True, False]}
-    default_options = {"shared": False, "fPIC": True}
-    exports_sources = "CMakeLists.txt"
+    options = {
+        "shared": [True, False],
+        "fPIC": [True, False],
+        "tools": [True, False]
+    }
+    default_options = {
+        "shared": False,
+        "fPIC": True,
+        "tools": True
+    }
+    exports_sources = ["CMakeLists.txt", "patches/*"]
     generators = "cmake"
 
     _cmake = None
@@ -47,12 +55,15 @@ def _cmake_configure(self):
         self._cmake = CMake(self)
         self._cmake.definitions["CARES_STATIC"] = not self.options.shared
         self._cmake.definitions["CARES_SHARED"] = self.options.shared
-        self._cmake.definitions["CARES_BUILD_TESTS"] = "OFF"
-        self._cmake.definitions["CARES_MSVC_STATIC_RUNTIME"] = "OFF"
+        self._cmake.definitions["CARES_BUILD_TESTS"] = False
+        self._cmake.definitions["CARES_MSVC_STATIC_RUNTIME"] = False
+        self._cmake.definitions["CARES_BUILD_TOOLS"] = self.options.tools
         self._cmake.configure(build_folder=self._build_subfolder)
         return self._cmake
 
     def build(self):
+        for patch in self.conan_data.get("patches", {}).get(self.version, []):
+            tools.patch(**patch)
         cmake = self._cmake_configure()
         cmake.build()
 
@@ -77,9 +88,10 @@ def package_info(self):
             self.cpp_info.components["cares"].system_libs.append("rt")
         elif self.settings.os == "Windows":
             self.cpp_info.components["cares"].system_libs.extend(["ws2_32", "Advapi32"])
-        elif self.settings.os == "Macos":
+        elif tools.is_apple_os(self.settings.os):
             self.cpp_info.components["cares"].system_libs.append("resolv")
 
-        bin_path = os.path.join(self.package_folder, "bin")
-        self.output.info("Appending PATH environment variable: {}".format(bin_path))
-        self.env_info.PATH.append(bin_path)
+        if self.options.tools:
+            bin_path = os.path.join(self.package_folder, "bin")
+            self.output.info("Appending PATH environment variable: {}".format(bin_path))
+            self.env_info.PATH.append(bin_path)

recipes/c-ares/all/patches/option-tools.patch

@@ -0,0 +1,16 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -670,6 +670,8 @@ SET (CARES_FOUND 1 CACHE INTERNAL "CARES LIBRARY FOUND")
+ SET (CARES_LIBRARIES ${PROJECT_NAME}::cares CACHE INTERNAL "CARES LIBRARIES")
+
+
++OPTION (CARES_BUILD_TOOLS "Build tools" ON)
++IF(CARES_BUILD_TOOLS)
+ # Build ahost
+ ADD_EXECUTABLE (ahost ahost.c ${SAMPLESOURCES})
+ TARGET_COMPILE_DEFINITIONS (ahost PRIVATE HAVE_CONFIG_H=1)
+@@ -695,3 +697,4 @@ TARGET_LINK_LIBRARIES (acountry PRIVATE ${PROJECT_NAME})
+ IF (CARES_INSTALL)
+ 	INSTALL (TARGETS acountry ${TARGETS_INST_DEST})
+ ENDIF ()
++ENDIF()