Add minimum compiler check for cpp 17 compatibility

recipes/icu/all/conanfile.py

@@ -58,6 +58,16 @@ def _enable_icu_tools(self):
     def _with_unit_tests(self):
         return not self.conf.get("tools.build:skip_test", default=True, check_type=bool)
 
+    @property
+    def _minimum_compilers_version(self):
+        return {
+            "Visual Studio": "16",
+            "msvc": "192",
+            "gcc": "8",
+            "clang": "9",
+            "apple-clang": "12" if Version(self.version) >= "6.5.0" else "11"
+        }
+
     def export_sources(self):
         export_conandata_patches(self)
 
@@ -77,6 +87,11 @@ def validate(self):
 
         if self.settings.compiler.get_safe("cppstd"):
             check_min_cppstd(self, 17)
+        minimum_version = self._minimum_compilers_version.get(str(self.settings.compiler), False)
+        if not minimum_version:
+            self.output.warning("C++17 support required. Your compiler is unknown. Assuming it supports C++17.")
+        elif Version(self.settings.compiler.version) < minimum_version:
+            raise ConanInvalidConfiguration("C++17 support required, which your compiler does not support.")
 
     def layout(self):
         basic_layout(self, src_folder="src")