WIP

.github/workflows/main.yml

@@ -157,6 +157,7 @@ jobs:
   build-only-sysroot:
     name: Build only sysroot - ${{ matrix.name }}
     runs-on: ubuntu-24.04
+    needs: build  # Add dependency
     strategy:
       matrix:
         include:
@@ -170,10 +171,16 @@ jobs:
       - uses: ./.github/actions/checkout
       - uses: ./.github/actions/install-deps
       - run: cargo install wasm-component-ld@0.5.21
-      - run: sudo apt-get update -y && sudo apt-get install -y clang-20 lld-20
+      - uses: actions/download-artifact@v4
+        with:
+          name: dist-x86_64-linux
+          path: dist-x86_64-linux
+      - run: ./ci/merge-artifacts.sh
+      - run: tar xf dist/wasi-sdk-*.tar.gz
       - run: |
+          WASI_SDK_DIR=$(ls -d ./wasi-sdk-* | head -1)
           cmake -G Ninja -B build -S . \
-            -DCMAKE_C_COMPILER=/usr/lib/llvm-20/bin/clang \
+            -DCMAKE_C_COMPILER=$WASI_SDK_DIR/bin/clang \
             -DCMAKE_SYSTEM_NAME=WASI \
             -DWASI_SDK_INCLUDE_TESTS=ON \
             -DWASI_SDK_CPU_CFLAGS="" \

cmake/wasi-sdk-sysroot.cmake

@@ -133,8 +133,12 @@ function(define_wasi_libc_sub target target_suffix lto)
   get_property(directory_cflags DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY COMPILE_OPTIONS)
   set(extra_cflags_list "${WASI_SDK_CPU_CFLAGS} ${CMAKE_C_FLAGS} ${directory_cflags}")
 
-  if(${target} MATCHES p2 OR ${target} MATCHES p3)
+  if(${target} MATCHES p3)
-    # Always enable `-fPIC` for the `wasm32-wasip2` and `wasm32-wasip3` targets. This makes `libc.a`
+    list(APPEND extra_cmake_args -DBUILD_SHARED=OFF)
+  endif()
+
+  if(${target} MATCHES p2)
+    # Always enable `-fPIC` for the `wasm32-wasip2` targets. This makes `libc.a`
     # more flexible and usable in dynamic linking situations.
     list(APPEND extra_cflags_list -fPIC)
   endif()
@@ -205,7 +209,7 @@ execute_process(
   OUTPUT_STRIP_TRAILING_WHITESPACE)
 
 function(define_libcxx_sub target target_suffix extra_target_flags extra_libdir_suffix)
-  if(${target} MATCHES threads)
+  if(${target} MATCHES threads OR ${target} MATCHES p3)
     set(pic OFF)
     set(target_flags -pthread)
   else()

src/llvm-project

@@ -1 +1 @@
-Subproject commit 36ea1dfb7e24cdbcc4d8fb5bacd1d22dd0f470c3
+Subproject commit c8d54204f931757599092965975da00eb218a9fd

src/wasi-libc

@@ -1 +1 @@
-Subproject commit 5b95b096c157ad5a201150f146bc1d1ea2817650
+Subproject commit 36d2c170d7d71daf2cae71727d446a1fc5211b18

tests/CMakeLists.txt

@@ -83,7 +83,7 @@ function(add_testcase runwasi test)
       endif()
 
       # Apply target-specific options.
-      if(target MATCHES threads)
+      if(target MATCHES threads OR target MATCHES p3)
         target_compile_options(${target_name} PRIVATE -pthread)
         target_link_options(${target_name} PRIVATE -pthread)
       endif()
@@ -102,7 +102,7 @@ function(add_testcase runwasi test)
           if(WASI_SDK_EXCEPTIONS)
             set(runner "${runner} -Wexceptions")
           endif()
-          if(target MATCHES "wasip3")
+          if(target MATCHES p3)
             set(runner "${runner} -Wcomponent-model-async -Wcomponent-model-threading -Sp3")
           endif()
         endif()

tests/general/abort.c.stderr.expected

@@ -1,7 +1,7 @@
 Error: failed to run main module `abort.c.---.wasm`
 
 Caused by:
-    0: failed to invoke ---
+    0: error while executing at wasm backtrace:
-    1: error while executing at wasm backtrace:
+note: using the `WASMTIME_BACKTRACE_DETAILS=1` environment variable may show more debugging information
-       note: using the `WASMTIME_BACKTRACE_DETAILS=1` environment variable may show more debugging information
+    1: wasm trap: wasm `unreachable` instruction executed
-    2: wasm trap: wasm `unreachable` instruction executed
+

tests/general/assert-fail.c.stderr.expected

@@ -2,7 +2,7 @@ Assertion failed: false (assert-fail.c: main: 9)
 Error: failed to run main module `assert-fail.c.---.wasm`
 
 Caused by:
-    0: failed to invoke ---
+    0: error while executing at wasm backtrace:
-    1: error while executing at wasm backtrace:
+note: using the `WASMTIME_BACKTRACE_DETAILS=1` environment variable may show more debugging information
-       note: using the `WASMTIME_BACKTRACE_DETAILS=1` environment variable may show more debugging information
+    1: wasm trap: wasm `unreachable` instruction executed
-    2: wasm trap: wasm `unreachable` instruction executed
+

tests/general/sigabrt.c.stderr.expected

@@ -3,4 +3,4 @@ Program received fatal signal: Aborted
 Error: failed to run main module `sigabrt.c.---.wasm`
 
 Caused by:
-    0: failed to invoke ---
+    0: error while executing at wasm backtrace: