add llama.cpp (#1908)

* add llama.cpp

* fix errors

* fix errors

* fix time

packages/l/llama.cpp/xmake.lua

@@ -0,0 +1,43 @@
+package("llama.cpp")
+    set_homepage("https://github.com/ggerganov/llama.cpp")
+    set_description("Port of Facebook's LLaMA model in C/C++")
+
+    add_urls("https://github.com/ggerganov/llama.cpp.git")
+    add_versions("2023.03.11", "7d9ed7b25fe17db3fc8848b5116d14682864ce8e")
+
+    if is_plat("macosx") then
+        add_frameworks("Accelerate")
+    elseif is_plat("linux") then
+        add_syslinks("pthread")
+    end
+
+    on_install("linux", "macosx", function (package)
+        local configs = {}
+        io.writefile("xmake.lua", [[
+            add_rules("mode.release", "mode.debug")
+            target("llama")
+                set_kind("$(kind)")
+                add_files("*.c")
+                add_headerfiles("(*.h)")
+                set_languages("c11")
+                add_cflags("-pthread")
+                if is_plat("macosx") then
+                    add_defines("GGML_USE_ACCELERATE")
+                    add_frameworks("Accelerate")
+                end
+                if is_arch("x86_64", "x64", "i386", "x86") then
+                    add_vectorexts("avx", "avx2", "sse3")
+                    add_cflags("-mf16c")
+                elseif is_arch("arm.*") then
+                    add_vectorexts("neon")
+                end
+        ]])
+        if package:config("shared") then
+            configs.kind = "shared"
+        end
+        import("package.tools.xmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("ggml_time_us", {includes = "ggml.h"}))
+    end)