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conanfile.py

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+from conan import ConanFile
+from conan.tools.cmake import CMake, CMakeToolchain, CMakeDeps, cmake_layout
+from shutil import which
+
+class ArgonConan(ConanFile):
+    name = "argon"
+    version = "1.0"
+
+    settings = "os", "compiler", "build_type", "arch"
+    generators = "CMakeDeps"
+    # Remove tool_requires, no flex from Conan
+    requires = [
+        "gmp/6.3.0",
+        "cjson/1.7.16",
+        "bdwgc/8.2.8"
+    ]
+
+    default_options = {
+        "gmp/*:shared": False,
+        "cjson/*:shared": False,
+        "bdwgc/*:shared": False
+    }
+
+    def layout(self):
+        self.folders.source = "."
+        self.folders.build = "build"
+        self.folders.generators = "build"
+
+    def generate(self):
+        tc = CMakeToolchain(self)
+
+        # Try to find flex in system PATH first
+        flex_path = which("flex")
+
+        # If not found, fallback to flex from Conan build requirements
+        if not flex_path:
+            flex_dep = self.dependencies.build.get("flex", None)
+            if not flex_dep:
+                raise Exception("Flex not found in system PATH and not declared as build requirement")
+            flex_path = join(flex_dep.package_folder, "bin", "flex")
+
+        tc.variables["FLEX_EXECUTABLE"] = flex_path
+
+        tc.generate()
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()