add fann (#1622)

packages/f/fann/xmake.lua

@@ -0,0 +1,22 @@
+package("fann")
+    set_homepage("https://github.com/libfann/fann")
+    set_description("Official github repository for Fast Artificial Neural Network Library (FANN)")
+    set_license("LGPL-2.1")
+
+    add_urls("https://github.com/libfann/fann.git")
+    add_versions("2021.03.14", "a3cd24e528d6a865915a4fed6e8fac164ff8bfdc")
+
+    add_deps("cmake")
+
+    on_install("linux", "macosx", "windows", function (package)
+        local configs = {}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
+        table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
+        io.replace("CMakeLists.txt", "ADD_SUBDIRECTORY( tests )", "", {plain = true})
+        io.replace("CMakeLists.txt", "ADD_SUBDIRECTORY( lib/googletest )", "", {plain = true})
+        import("package.tools.cmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("fann_run", {includes = "floatfann.h"}))
+    end)