Buildroot hacks for wimp

build/config/BUILDCONFIG.gn

diff --git a/build/config/BUILDCONFIG.gn b/build/config/BUILDCONFIG.gn
index b74b2e2..e3a4e52 100644
--- a/build/config/BUILDCONFIG.gn
+++ b/build/config/BUILDCONFIG.gn
@@ -592,7 +592,21 @@
   win_toolchain_version = ""
   clang_win = ""
   clang_win_version = ""
-  host_toolchain = "//build/toolchain/wasm"
+  if (host_os == "linux") {
+    # Use clang for the x86/64 Linux host builds.
+    if (host_cpu == "x86" || host_cpu == "x64") {
+      host_toolchain = "//build/toolchain/linux:clang_$host_cpu"
+    } else {
+      host_toolchain = "//build/toolchain/linux:$host_cpu"
+    }
+  } else if (host_os == "mac") {
+    host_toolchain = "//build/toolchain/mac:clang_$host_cpu"
+  } else if (host_os == "win") {
+    assert(is_clang)
+    host_toolchain = "//build/toolchain/win:clang_$host_cpu"
+  } else {
+    assert(false, "Unknown host for wasm compile")
+  }
   set_default_toolchain("//build/toolchain/wasm")
 } else {
   assert(false, "Toolchain not set because of unknown platform.")

build/config/compiler/BUILD.gn

diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 1da7b04..12f34ab 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -1012,7 +1012,7 @@
       "-Wshorten-64-to-32",
       "-Wimplicit-int-conversion",
       "-Wsign-compare",
-      "-Wsign-conversion",
+      #"-Wsign-conversion",
       # Avoid bugs of the form `if (size_t i = size; i >= 0; --i)` while
       # fixing types to be sign-correct.
       "-Wtautological-unsigned-zero-compare",

build/config/mac/mac_sdk.gni

diff --git a/build/config/mac/mac_sdk.gni b/build/config/mac/mac_sdk.gni
index 6d59b1b..b2f1b43 100644
--- a/build/config/mac/mac_sdk.gni
+++ b/build/config/mac/mac_sdk.gni
@@ -18,8 +18,8 @@
   mac_sdk_path = ""
 }
 
-assert(mac_sdk_min != "")
-assert(mac_deployment_target != "")
+#assert(mac_sdk_min != "")
+#assert(mac_deployment_target != "")
 
 if (mac_sdk_path == "") {
   find_sdk_args = []

build/toolchain/wasm.gni

diff --git a/build/toolchain/wasm.gni b/build/toolchain/wasm.gni
index 0d9e3bf..a5e33ac 100644
--- a/build/toolchain/wasm.gni
+++ b/build/toolchain/wasm.gni
@@ -101,6 +101,7 @@
     "deps",
     "includes",
     "inputs",
+    "libs",
     "sources",
     "include_dirs",
     "public_configs",