rust: use our compiler builtins library (#26999)

every time std is built there is a `compiler-builtins` crate being built. it compiles specific LLVM
sources (compiler-rt part) to get optimized intrinsics. make the build faster a bit by using our own
library

Author: ognevny

mingw-w64-rust/PKGBUILD

@@ -23,7 +23,7 @@ pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}"
            "${MINGW_PACKAGE_PREFIX}-rust-wasm" \
            "${MINGW_PACKAGE_PREFIX}-rust-emscripten"))
 pkgver=1.92.0
-pkgrel=1
+pkgrel=2
 pkgdesc="Systems programming language focused on safety, speed and concurrency (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -39,6 +39,7 @@ license=('spdx:Apache-2.0 AND MIT')
 makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
              "${MINGW_PACKAGE_PREFIX}-clang"
              "${MINGW_PACKAGE_PREFIX}-cmake"
+             "${MINGW_PACKAGE_PREFIX}-compiler-rt"
              "${MINGW_PACKAGE_PREFIX}-curl"
              "${MINGW_PACKAGE_PREFIX}-libffi"
              "${MINGW_PACKAGE_PREFIX}-libgit2"
@@ -57,9 +58,7 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
                "${MINGW_PACKAGE_PREFIX}-emscripten" \
                "${MINGW_PACKAGE_PREFIX}-wasi-libc" \
                "${MINGW_PACKAGE_PREFIX}-wasm-component-ld")
-             $((( _pgo )) && echo \
-               "${MINGW_PACKAGE_PREFIX}-compiler-rt" \
-               "${MINGW_PACKAGE_PREFIX}-lld"))
+             $((( _pgo )) && echo "${MINGW_PACKAGE_PREFIX}-lld"))
 source=("${rust_dist_server}/${_realname}c-${pkgver}-src.tar.xz"{,.asc}
         "bootstrap.toml"
         "bootstrap-wasm.toml"
@@ -73,7 +72,7 @@ source=("${rust_dist_server}/${_realname}c-${pkgver}-src.tar.xz"{,.asc}
 noextract=(${_realname}c-${pkgver}-src.tar.xz)
 sha256sums=('ebee170bfe4c4dfc59521a101de651e5534f4dae889756a5c97ca9ea40d0c307'
             'SKIP'
-            '575e47859d2ff5dbc73291a2f976bc682338e323b6e6c5858bc40955bbbb7005'
+            '107e2bba21a572a020d34dceba3b2c0ae18976ad67e91254b85b290d8db32a6a'
             'd693577fabe39a3046cd44fd002adf9557de6883eaea9007eae7f8372295ea0e'
             '7cb1773c288ffb1c1e751edc49b1890c84bf9c362742bc5225d19d474edb73a0'
             '56882f1a0f1404c10c7726d6cc37444f2b343e72b969badfcb43760f80db0f32'
@@ -145,6 +144,16 @@ build() {
   export LIBSQLITE3_SYS_USE_PKG_CONFIG=1
   export LIBSSH2_SYS_USE_PKG_CONFIG=1
 
+  # use our compiler-rt for host target
+  local _clangdir="$(clang -print-resource-dir)"
+  local _rt_arch
+  if [ $CARCH = i686 ]; then
+    _rt_arch=i386
+  else
+    _rt_arch=${CARCH}
+  fi
+  export COMPILER_RT_PATH="${_clangdir}/lib/windows/libclang_rt.builtins-${_rt_arch}.a"
+
   # substitute the values in bootstrap.toml
   export MSYS2_ENV_CONV_EXCL='INSTALL_PREFIX'
   export INSTALL_PREFIX="${MINGW_PREFIX}"

mingw-w64-rust/bootstrap.toml

@@ -69,60 +69,4 @@ ar = "$MINGW_PREFIX/bin/llvm-ar.exe"
 ranlib = "$MINGW_PREFIX/bin/llvm-ranlib.exe"
 linker = "$MINGW_PREFIX/bin/clang.exe"
 llvm-config = "$MINGW_PREFIX/bin/llvm-config.exe"
-
-[target.wasm32-unknown-unknown]
-cc = "$MINGW_PREFIX/bin/clang.exe"
-cxx = "$MINGW_PREFIX/bin/clang++.exe"
-ar = "$MINGW_PREFIX/bin/llvm-ar.exe"
-ranlib = "$MINGW_PREFIX/bin/llvm-ranlib.exe"
-linker = "$MINGW_PREFIX/bin/wasm-ld.exe"
-default-linker = "wasm-ld.exe"
-profiler = false
-
-[target.wasm32-unknown-emscripten]
-cc = "$MINGW_PREFIX/lib/emscripten/emcc.bat"
-cxx = "$MINGW_PREFIX/lib/emscripten/em++.bat"
-ar = "$MINGW_PREFIX/lib/emscripten/emar.bat"
-ranlib = "$MINGW_PREFIX/lib/emscripten/emranlib.bat"
-linker = "$MINGW_PREFIX/bin/wasm-ld.exe"
-default-linker = "wasm-ld.exe"
-profiler = false
-
-[target.wasm32v1-none]
-cc = "$MINGW_PREFIX/bin/clang.exe"
-cxx = "$MINGW_PREFIX/bin/clang++.exe"
-ar = "$MINGW_PREFIX/bin/llvm-ar.exe"
-ranlib = "$MINGW_PREFIX/bin/llvm-ranlib.exe"
-linker = "$MINGW_PREFIX/bin/wasm-ld.exe"
-default-linker = "wasm-ld.exe"
-profiler = false
-
-[target.wasm32-wasip1]
-cc = "$MINGW_PREFIX/bin/clang.exe"
-cxx = "$MINGW_PREFIX/bin/clang++.exe"
-ar = "$MINGW_PREFIX/bin/llvm-ar.exe"
-ranlib = "$MINGW_PREFIX/bin/llvm-ranlib.exe"
-linker = "$MINGW_PREFIX/bin/wasm-ld.exe"
-default-linker = "wasm-ld.exe"
-profiler = false
-wasi-root = "$MINGW_PREFIX/share/wasi-sysroot"
-
-[target.wasm32-wasip1-threads]
-cc = "$MINGW_PREFIX/bin/clang.exe"
-cxx = "$MINGW_PREFIX/bin/clang++.exe"
-ar = "$MINGW_PREFIX/bin/llvm-ar.exe"
-ranlib = "$MINGW_PREFIX/bin/llvm-ranlib.exe"
-linker = "$MINGW_PREFIX/bin/wasm-ld.exe"
-default-linker = "wasm-ld.exe"
-profiler = false
-wasi-root = "$MINGW_PREFIX/share/wasi-sysroot"
-
-[target.wasm32-wasip2]
-cc = "$MINGW_PREFIX/bin/clang.exe"
-cxx = "$MINGW_PREFIX/bin/clang++.exe"
-ar = "$MINGW_PREFIX/bin/llvm-ar.exe"
-ranlib = "$MINGW_PREFIX/bin/llvm-ranlib.exe"
-linker = "$MINGW_PREFIX/bin/wasm-ld.exe"
-default-linker = "wasm-ld.exe"
-profiler = false
-wasi-root = "$MINGW_PREFIX/share/wasi-sysroot"
+optimized-compiler-builtins = "$COMPILER_RT_PATH"