ffts: add package (#5489)

* ffts: add package

* assert clang toolchain

packages/f/ffts/xmake.lua

@@ -0,0 +1,64 @@
+package("ffts")
+    set_homepage("http://anthonix.com/ffts")
+    set_description("The Fastest Fourier Transform in the South")
+
+    add_urls("https://github.com/linkotec/ffts.git")
+    add_versions("2019.03.19", "2c8da4877588e288ff4cd550f14bec2dc7bf668c")
+
+    add_configs("neon", {description = "Enables the use of NEON instructions.", default = false, type = "boolean"})
+    add_configs("vfp", {description = "Enables the use of VFP instructions.", default = false, type = "boolean"})
+
+    add_deps("cmake")
+
+    if on_check then
+        on_check(function (package)
+            if package:has_tool("cc", "clang", "clang_cl") then
+                raise("package(ffts) unsupported clang toolchain")
+            end
+        end)
+    end
+
+    on_install(function (package)
+        -- remove test
+        io.replace("CMakeLists.txt", "endif(ENABLE_STATIC OR ENABLE_SHARED)", "endif(0)", {plain = true})
+        io.replace("CMakeLists.txt", "if(ENABLE_STATIC OR ENABLE_SHARED)", "if(0)", {plain = true})
+        io.replace("CMakeLists.txt",
+            "install( TARGETS ffts_shared DESTINATION ${LIB_INSTALL_DIR} )",
+            [[install(TARGETS ffts_shared
+                RUNTIME DESTINATION bin
+                LIBRARY DESTINATION lib
+                ARCHIVE DESTINATION lib
+            )
+            ]], {plain = true})
+
+        if package:is_plat("android") then
+            io.replace("src/ffts.c", "cacheflush((long) start, (long) start + length, 0);", [[
+                #if defined(__arm__) || defined(__aarch64__)
+                    int cacheflush(long __addr, long __nbytes, long __cache);
+                    cacheflush((long) start, (long) start + length, 0);
+                #endif
+            ]], {plain = true})
+        end
+
+        if package:is_plat("windows") and package:config("shared") then
+            package:add("defines", "FFTS_SHARED")
+        end
+
+        local configs = {"-DCMAKE_POLICY_DEFAULT_CMP0057=NEW"}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:is_debug() and "Debug" or "Release"))
+        table.insert(configs, "-DENABLE_SHARED=" .. (package:config("shared") and "ON" or "OFF"))
+        table.insert(configs, "-DENABLE_STATIC=" .. (package:config("shared") and "OFF" or "ON"))
+        table.insert(configs, "-DCMAKE_CROSSCOMPILING=" .. (package:is_cross() and "ON" or "OFF"))
+        table.insert(configs, "-DENABLE_NEON=" .. (package:config("neon") and "ON" or "OFF"))
+        table.insert(configs, "-DENABLE_VFP=" .. (package:config("vfp") and "ON" or "OFF"))
+        import("package.tools.cmake").install(package, configs)
+
+        if package:is_plat("windows") and package:is_debug() then
+            local dir = package:installdir(package:config("shared") and "bin" or "lib")
+            os.trycp(path.join(package:buildir(), "fftsd.pdb"), dir)
+        end
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("ffts_execute", {includes = "ffts/ffts.h"}))
+    end)