diff --git a/packages/c/c4core/patches/0.2.1/cmake-deps.patch b/packages/c/c4core/patches/0.2.1/cmake-deps.patch
new file mode 100644
index 000000000..71e788cdc
--- /dev/null
+++ b/packages/c/c4core/patches/0.2.1/cmake-deps.patch
@@ -0,0 +1,29 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index ea146a8..31373e5 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -69,14 +69,12 @@ set(C4CORE_SRC_FILES
+     c4/windows_push.hpp
+     c4/c4core.natvis
+     #
+-    c4/ext/debugbreak/debugbreak.h
+     c4/ext/rng/rng.hpp
+     c4/ext/sg14/inplace_function.h
+     )
+ if(C4CORE_WITH_FASTFLOAT)
+     list(APPEND C4CORE_SRC_FILES
+         c4/ext/fast_float.hpp
+-        c4/ext/fast_float_all.h
+         )
+ endif()
+ set(C4CORE_AMALGAMATED ${C4CORE_SRC_DIR}/../src_singleheader/c4/c4core_all.hpp)
+@@ -97,6 +95,9 @@ c4_add_library(c4core
+ )
+ if(NOT C4CORE_WITH_FASTFLOAT)
+     target_compile_definitions(c4core PUBLIC -DC4CORE_NO_FAST_FLOAT)
++else()
++    find_package(FastFloat REQUIRED CONFIG)
++    target_link_libraries(c4core PUBLIC "FastFloat::fast_float")
+ endif()
+ if(C4CORE_NO_DEBUG_BREAK)
+     target_compile_definitions(c4core PUBLIC -DC4_NO_DEBUG_BREAK)
diff --git a/packages/c/c4core/xmake.lua b/packages/c/c4core/xmake.lua
new file mode 100644
index 000000000..3f3db7046
--- /dev/null
+++ b/packages/c/c4core/xmake.lua
@@ -0,0 +1,56 @@
+package("c4core")
+    set_homepage("https://github.com/biojppm/c4core")
+    set_description("C++ utilities")
+    set_license("MIT")
+
+    add_urls("https://github.com/biojppm/c4core/releases/download/v$(version)/c4core-$(version)-src.zip",
+             "https://github.com/biojppm/c4core.git")
+
+    add_versions("0.2.1", "81ff1c0d15e24da6d76fdd1b6fdd903fa23d0df7c82e564f993147a4dac88773")
+
+    add_configs("fast_float", {description = "use fastfloat to parse floats", default = false, type = "boolean"})
+    add_configs("debugbreak", {description = "use debug break in debug builds", default = false, type = "boolean"})
+
+    add_deps("cmake")
+
+    on_load(function (package)
+        if package:config("fast_float") then
+            package:add("deps", "fast_float")
+        else
+            package:add("defines", "C4CORE_NO_FAST_FLOAT")
+        end
+        if package:config("debugbreak") then
+            package:add("deps", "debugbreak")
+        else
+            package:add("defines", "C4_NO_DEBUG_BREAK")
+        end
+
+        if package:config("fast_float") or package:config("debugbreak") then
+            package:add("patches", "0.2.1", "patches/0.2.1/cmake-deps.patch", "92c0c6510cc3b8cbd10b575b5b9d0defa2a19d19f24c1618a73d4f4636da4c9b")
+        end
+    end)
+
+    on_install(function (package)
+        if package:config("fast_float") then
+            io.replace("src/c4/ext/fast_float.hpp", "c4/ext/fast_float_all.h", "fast_float/fast_float.h", {plain = true})
+        end
+        if package:config("debugbreak") then
+            io.replace("src/c4/error.hpp", "c4/ext/debugbreak/debugbreak.h", "debugbreak.h", {plain = true})
+        end
+
+        local configs = {}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:is_debug() and "Debug" or "Release"))
+        table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
+        table.insert(configs, "-DC4CORE_WITH_FASTFLOAT=" .. (package:config("fast_float") and "ON" or "OFF"))
+        table.insert(configs, "-DC4CORE_NO_DEBUG_BREAK=" .. (package:config("debugbreak") and "OFF" or "ON"))
+        import("package.tools.cmake").install(package, configs, {packagedeps = "debugbreak"})
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                double value;
+                c4::from_chars("52.4354", &value);
+            }
+        ]]}, {configs = {languages = "c++11"}, includes = "c4/charconv.hpp"}))
+    end)