llvm 工具链构建失败

[yizhinailong]

Bug 报告

mcpp 版本： v0.0.19
操作系统： Linux x86_64 (WSL archlinux)
工具链： llvm@20.1.7

问题描述

将默认工具链切换到 llvm@20.1.7 后，构建在依赖扫描阶段失败。使用 llvm 工具链的项目无法构建。

复现步骤

1. mcpp toolchain install llvm 20.1.7
2. mcpp toolchain default llvm 20.1.7
3. mcpp new test-clang && cd test-clang
4. mcpp build

期望行为

使用 clang++ 正常构建，与 gcc@15.1.0-musl 工具链表现一致。

实际行为

❯ mcpp build
   Resolving toolchain
    Resolved llvm@20.1.7 → @mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/bin/clang++
    Inferred sources [src/**/*.{cppm,cpp,cc,c}]
    Inferred target mcpp-demo-clang (bin from src/main.cpp)
   Compiling mcpp-demo-clang v0.1.0 (.)
ninja: Entering directory `/home/liufeng/workspace/mcpp-demo-clang/target/x86_64-unknown-linux-gnu/e79ff64f8032c752'
[1/4] SCAN obj/main.cpp.ddi
FAILED: obj/main.cpp.ddi
env LD_LIBRARY_PATH='/home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/lib:/home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/lib/x86_64-unknown-linux-gnu:/usr/lib64:/home/liufeng/.mcpp/registry/data/xpkgs/xim-x-gcc-runtime/15.1.0/lib64'${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}  /home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/bin/clang-scan-deps -format=p1689 -- /home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/bin/clang++ -std=c++23 -fmodule-file=std=/home/liufeng/workspace/mcpp-demo-clang/target/x86_64-unknown-linux-gnu/e79ff64f8032c752/pcm.cache/std.pcm -fmodule-file=std.compat=/home/liufeng/workspace/mcpp-demo-clang/target/x86_64-unknown-linux-gnu/e79ff64f8032c752/pcm.cache/std.compat.pcm -fprebuilt-module-path=pcm.cache -O2 --sysroot=/home/liufeng/.mcpp/registry/subos/default -c /home/liufeng/workspace/mcpp-demo-clang/src/main.cpp -o obj/main.o > obj/main.cpp.ddi
ninja: build stopped: subcommand failed.
error: ninja failed (exit non-zero):
ninja: Entering directory `/home/liufeng/workspace/mcpp-demo-clang/target/x86_64-unknown-linux-gnu/e79ff64f8032c752'
[1/4] SCAN obj/main.cpp.ddi
FAILED: obj/main.cpp.ddi
env LD_LIBRARY_PATH='/home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/lib:/home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/lib/x86_64-unknown-linux-gnu:/usr/lib64:/home/liufeng/.mcpp/registry/data/xpkgs/xim-x-gcc-runtime/15.1.0/lib64'${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}  /home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/bin/clang-scan-deps -format=p1689 -- /home/liufeng/.mcpp/registry/data/xpkgs/xim-x-llvm/20.1.7/bin/clang++ -std=c++23 -fmodule-file=std=/home/liufeng/workspace/mcpp-demo-clang/target/x86_64-unknown-linux-gnu/e79ff64f8032c752/pcm.cache/std.pcm -fmodule-file=std.compat=/home/liufeng/workspace/mcpp-demo-clang/target/x86_64-unknown-linux-gnu/e79ff64f8032c752/pcm.cache/std.compat.pcm -fprebuilt-module-path=pcm.cache -O2 --sysroot=/home/liufeng/.mcpp/registry/subos/default -c /home/liufeng/workspace/mcpp-demo-clang/src/main.cpp -o obj/main.o > obj/main.cpp.ddi