fgt: add package (#6306)

packages/f/fgt/xmake.lua

@@ -0,0 +1,51 @@
+package("fgt")
+    set_homepage("http://gadomski.github.io/fgt")
+    set_description("C++ library for fast Gauss transforms.")
+    set_license("LGPL-2.1")
+
+    add_urls("https://github.com/gadomski/fgt/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/gadomski/fgt.git")
+
+    add_versions("v0.4.11", "3f11165ae3bb6c349b1fb8971bb4bdeee2c58ca68184e8c603f1964a67282e3b")
+
+    add_configs("openmp", {description = "Use OpenMP parallelization", default = false, type = "boolean"})
+
+    add_deps("cmake")
+    add_deps("eigen")
+
+    on_load(function (package)
+        if package:config("openmp") then
+            package:add("deps", "openmp")
+            package:add("defines", "FGT_WITH_OPENMP")
+        end
+        if not package:config("shared") then
+            package:add("defines", "LIBRARY_C___STATIC_DEFINE")
+        end
+    end)
+
+    on_install(function (package)
+        io.replace("CMakeLists.txt", "STATIC", "", {plain = true})
+        io.replace("CMakeLists.txt", "SHARED", "", {plain = true})
+
+        local configs = {"-DWITH_TESTS=OFF"}
+        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"))
+        if package:is_plat("windows") and package:config("shared") then
+            table.insert(configs, "-DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=ON")
+        end
+
+        local opt = {}
+        if package:has_tool("cxx", "cl") then
+            opt.cxflags = "/utf-8"
+        end
+        import("package.tools.cmake").install(package, configs, opt)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test(const Eigen::MatrixXd& x, const Eigen::MatrixXd& y) {
+                double bandwidth = 0.3;
+                Eigen::VectorXd gauss_transform = fgt::direct(x, y, bandwidth);
+            }
+        ]]}, {configs = {languages = "c++17"}, includes = "fgt.hpp"}))
+    end)