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🔥 A cross-platform build utility based on Lua
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arch无法使用c++标准库模块 #5501

Closed Bright-Nabarro closed 1 month ago

Bright-Nabarro commented 1 month ago

Xmake 版本

2.9.4

操作系统版本和架构

Linux DESKTOP-3STVTCR 5.15.153.1-microsoft-standard-WSL2 #1 SMP Fri Mar 29 23:14:13 UTC 2024 x86_64 GNU/Linux

描述问题

gcc与clang使用import<...>导入标准库模块无法成功编译

期待的结果

hello world!

工程配置

--xmake.lua
add_rules("mode.debug", "mode.release")

target("hello")
    set_kind("binary")
    add_files("src/*.cpp")
    set_languages("c++20")
    set_policy("build.c++.modules", true)
//src/main.cpp
import <iostream>;

int main(int argc, char** argv) {
    std::cout << "hello world!" << std::endl;
    return 0;
}

附加信息和错误日志

❯ xmake -vD [ 0%]: generating.module.deps src/main.cpp /usr/sbin/gcc -m64 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -std=c++20 -fmodules-ts -D_GLIBCXX_USE_CXX11_ABI=0 -DNDEBUG -E -x c++ src/main.cpp -MT build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.json -MD -MF build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.d -fdeps-format=p1689r5 -fdeps-file=build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.json -fdeps-target=build/.objs/hello/linux/x86_64/release/src/main.cpp.o -o build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.i In module imported at src/main.cpp:1:1: /usr/include/c++/14.2.1/iostream: error: failed to read compiled module: No such file or directory /usr/include/c++/14.2.1/iostream: note: compiled module file is 'gcm.cache/./usr/include/c++/14.2.1/iostream.gcm' /usr/include/c++/14.2.1/iostream: note: imports must be built before being imported /usr/include/c++/14.2.1/iostream: fatal error: returning to the gate for a mechanical issue compilation terminated. error: @programdir/core/main.lua:329: @programdir/actions/build/main.lua:148: @programdir/modules/async/runjobs.lua:325: @programdir/core/sandbox/modules/os.lua:378: execv(/usr/sbin/gcc -m64 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -std=c++20 -fmodules-ts -D_GLIBCXX_USE_CXX11_ABI=0 -DNDEBUG -E -x c++ src/main.cpp -MT build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.json -MD -MF build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.d -fdeps-format=p1689r5 -fdeps-file=build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.json -fdeps-target=build/.objs/hello/linux/x86_64/release/src/main.cpp.o -o build/.gens/hello/linux/x86_64/release/rules/bmi/cache/modules/2d9b7c0b/main.cpp.i) failed(1) stack traceback: [C]: in function 'error' [@programdir/core/base/os.lua:973]: [@programdir/core/sandbox/modules/os.lua:378]: [@programdir/core/sandbox/modules/os.lua:291]: in function 'vrunv' [...s/c++/modules/modules_support/gcc/dependency_scanner.lua:53]: in function 'callback' [@programdir/modules/core/project/depend.lua:217]: in function 'on_changed' [...s/c++/modules/modules_support/gcc/dependency_scanner.lua:40]: in function 'generate_dependency_for' [...rules/c++/modules/modules_support/dependency_scanner.lua:227]: in function 'jobfunc' [@programdir/modules/async/runjobs.lua:241]:

stack traceback: [C]: in function 'error' @programdir/core/base/os.lua:973: in function 'base/os.raiselevel' (...tail calls...) @programdir/core/main.lua:329: in upvalue 'cotask' @programdir/core/base/scheduler.lua:406: in function <@programdir/core/base/scheduler.lua:399>

Issues-translate-bot commented 1 month ago

Bot detected the issue body's language is not English, translate it automatically.

Title: arch cannot use c++ standard library module

waruqi commented 1 month ago 
xmake f --toolchain=clang --runtimes=c++_shared -c
xmake -rv

试试呢

waruqi commented 1 month ago

import ;

你这也不是 std模块吧，是 std headerunits 。。这个 llvm/clang 本身的 deps scan 支持还有点问题。

std module 应该是用 import std;

参考 https://github.com/xmake-io/xmake/tree/dev/tests/projects/c%2B%2B/modules/stdmodules

Issues-translate-bot commented 1 month ago

Bot detected the issue body's language is not English, translate it automatically.

import ;

This is not a std module, but std headerunits. . There is still a problem with the deps scan support of llvm/clang itself.

std module should be imported std;

Reference https://github.com/xmake-io/xmake/tree/dev/tests/projects/c%2B%2B/modules/stdmodules

Bright-Nabarro commented 1 month ago 
xmake f --toolchain=clang --runtimes=c++_shared -c
xmake -rv

试试呢

❯ xmake f --toolchain=clang --runtimes=c++_shared -c checking for platform ... linux checking for architecture ... x86_64 ❯ xmake -vD checking for flags (clang_print_library_module_manifest_path) ... no

clang "-print-library-module-manifest-path" "-Qunused-arguments" "-m64" checkinfo: @programdir/core/sandbox/modules/os.lua:273: clang: error: unknown argument: '-print-library-module-manifest-path'

stack traceback: [C]: in function 'error' [@programdir/core/base/os.lua:973]: [@programdir/core/sandbox/modules/os.lua:273]: in function 'runv' [@programdir/modules/detect/tools/gcc/has_flags.lua:42]: [ 0%]: generating.module.deps src/main.cpp checking for /usr/sbin/clang-scan-deps ... ok checking for flags (-fvisibility-inlines-hidden) ... ok

clang "-fvisibility-inlines-hidden" "-Qunused-arguments" "-m64" checking for flags (-O3) ... ok clang "-O3" "-Qunused-arguments" "-m64" checking for flags (-std=c++20) ... ok clang "-std=c++20" "-Qunused-arguments" "-m64" checking for flags (-DNDEBUG) ... ok clang "-DNDEBUG" "-Qunused-arguments" "-m64" /usr/sbin/clang-scan-deps --format=p1689 -- /usr/sbin/clang -x c++ -c src/main.cpp -o build/.objs/hello/linux/x86_64/release/src/main.cpp.o -Qunused-arguments -m64 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -std=c++20 -stdlib=libc++ -DNDEBUG error: Error while scanning dependencies for src/main.cpp: src/main.cpp:1:8: error: header file (aka '/usr/sbin/../include/c++/v1/iostream') cannot be imported because it is not known to be a header unit

stack traceback: [C]: in function 'error' @programdir/core/base/os.lua:977: in function 'base/os.raiselevel' (...tail calls...) @programdir/core/main.lua:329: in upvalue 'cotask' @programdir/core/base/scheduler.lua:406: in function <@programdir/core/base/scheduler.lua:399>

Bright-Nabarro commented 1 month ago

import ;

你这也不是 std模块吧，是 std headerunits 。。这个 llvm/clang 本身的 deps scan 支持还有点问题。

std module 应该是用 import std;

参考 https://github.com/xmake-io/xmake/tree/dev/tests/projects/c%2B%2B/modules/stdmodules

使用import std; 能够在系统上正常编译运行

Issues-translate-bot commented 1 month ago

Bot detected the issue body's language is not English, translate it automatically.

import ;

This is not a std module, but std headerunits. . There is still a problem with the deps scan support of llvm/clang itself.

std module should be imported std;

Reference https://github.com/xmake-io/xmake/tree/dev/tests/projects/c%2B%2B/modules/stdmodules

Use import std; to compile and run normally on the system

waruqi commented 1 month ago

那不是好了么。。

/usr/sbin/clang-scan-deps --format=p1689 -- /usr/sbin/clang -x c++ -c src/main.cpp -o build/.objs/hello/linux/x86_64/release/src/main.cpp.o -Qunused-arguments -m64 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -std=c++20 -stdlib=libc++ -DNDEBUG error: Error while scanning dependencies for src/main.cpp: src/main.cpp:1:8: error: header file (aka '/usr/sbin/../include/c++/v1/iostream') cannot be imported because it is not known to be a header unit

clang-scan-deps 这个最新版 都还没很好支持 headerunit ，这个你要到 llvm/clang 那边去反馈。。

Ariaszzzhc commented 3 weeks ago

@Bright-Nabarro pacman 安装的 llvm 已经支持 import std 了吗