support wasi-sdk

scripts/compiler/wasi.lua

@@ -0,0 +1,68 @@
+local wasi = require "compiler.gcc"
+local globals = require "globals"
+
+function wasi.update_flags(flags, _, cxxflags, attribute)
+    if attribute.mode == "debug" then
+        flags[#flags+1] = "-g"
+    end
+    if attribute.lto ~= "off" then
+        if attribute.lto == "thin" then
+            flags[#flags+1] = "-flto=thin"
+        else
+            flags[#flags+1] = "-flto"
+        end
+    end
+    if attribute.rtti == "off" then
+        cxxflags[#cxxflags+1] = "-fno-rtti"
+    end
+    flags[#flags+1] = "-target"
+    flags[#flags+1] = attribute.target or "wasm32-wasi"
+    flags[#flags+1] = "--sysroot"
+    flags[#flags+1] = globals.WASI_SDK_PATH.."/share/wasi-sysroot"
+end
+
+function wasi.update_ldflags(ldflags, attribute)
+    if attribute.crt == "dynamic" then
+        ldflags[#ldflags+1] = "-lstdc++"
+    else
+        ldflags[#ldflags+1] = "-Wl,--push-state,-Bstatic"
+        ldflags[#ldflags+1] = "-lstdc++"
+        ldflags[#ldflags+1] = "-Wl,--pop-state"
+    end
+    if attribute.mode ~= "debug" then
+        ldflags[#ldflags+1] = "-Wl,-S"
+    end
+    if attribute.lto ~= "off" then
+        if attribute.lto == "thin" then
+            ldflags[#ldflags+1] = "-flto=thin"
+        else
+            ldflags[#ldflags+1] = "-flto"
+        end
+    end
+    ldflags[#ldflags+1] = "-target"
+    ldflags[#ldflags+1] = attribute.target or "wasm32-wasi"
+    ldflags[#ldflags+1] = "--sysroot"
+    ldflags[#ldflags+1] = globals.WASI_SDK_PATH.."/share/wasi-sysroot"
+end
+
+function wasi.rule_dll(w, name, ldflags)
+    error "TODO"
+end
+
+function wasi.rule_exe(w, name, ldflags)
+    if globals.hostshell == "cmd" then
+        w:rule("link_"..name, ([[$cc @$out.rsp -o $out %s]]):format(ldflags),
+            {
+                description = "Link    Exe $out",
+                rspfile = "$out.rsp",
+                rspfile_content = "$in",
+            })
+    else
+        w:rule("link_"..name, ([[$cc $in -o $out %s]]):format(ldflags),
+            {
+                description = "Link    Exe $out"
+            })
+    end
+end
+
+return wasi

scripts/env/wasi.lua

@@ -0,0 +1,2 @@
+local globals = require "globals"
+globals.cc = globals.WASI_SDK_PATH .. "/bin/clang"

scripts/writer.lua

@@ -772,6 +772,9 @@ function m.generate()
     if globals.os == "android" and globals.hostos ~= "android" then
         require "env.ndk"
     end
+    if globals.compiler == "wasi" then
+        require "env.wasi"
+    end
 
     if globals.compiler == "msvc" then
         if not globals.prebuilt then