c++ module 编译出错

[RI-ss]

编译出错 重复定义符号

ide还显示无法找到 unit

---

另外新创建一个工程 用msbuild





可以找到该模块， 编译并运行成功

并且以上错误并不是一直存在，有时候清理一下工程，或者debug，release模式转换一下又可以编译成功

但是，一直显示无法找到该模块

请问哪里出了问题

[waruqi]

给个可复现的 demo 工程

[RI-ss]

https://cloud.189.cn/web/share?code=7f2AfmaueqU3（访问码：oso3）

[waruqi]

github 可以直接上传附件的

[RI-ss]

请用7z打开.zip

[waruqi]

这不可以的么，没啥问题

[waruqi]

还是复现不了

[RI-ss]

e 可能是vs抽风？

[waruqi]

不知道，无法复现，只能你自己调下了。。

xmake/xmake/rules/c++/modules/modules_support/msvc.lua

Line 86 in fce1932

function _add_objectfile_to_link_arguments(target, objectfile)

看下为啥 link obj 会 debug/release 重复加进去

[RI-ss]

你好 又出现一个类似的情况 全部清除后可以编译，让后release debug 切换一下出现错误, 看下能否复现
PS D:\c++\sdlt3> xmake f -m debug
checking for platform ... windows
checking for architecture ... x64
checking for Microsoft Visual Studio (x64) version ... 2022
PS D:\c++\sdlt3> xmake
[ 0%]: generating.module.deps src\main.cpp
[ 0%]: generating.module.deps src\unit.ixx
[ 0%]: generating.module.deps sparse_set\sparse_set.ixx
[ 8%]: compiling.module.debug sparse_set
[ 8%]: compiling.module.debug std
[ 8%]: compiling.headerunit.debug format
[ 8%]: compiling.headerunit.debug iostream
[ 8%]: compiling.headerunit.debug math.h
[ 8%]: compiling.headerunit.debug String
[ 34%]: compiling.module.debug std.compat
[ 52%]: compiling.module.debug unit
[ 52%]: archiving.debug sparse_set.lib
[ 82%]: compiling.debug src\main.cpp
[ 82%]: compiling.debug src\glad.c
[ 91%]: linking.debug sdlt3.exe
[100%]: build ok, spent 6.953s
PS D:\c++\sdlt3> xmake f -m release
checking for platform ... windows
checking for architecture ... x64
checking for Microsoft Visual Studio (x64) version ... 2022
PS D:\c++\sdlt3> xmake
[ 0%]: generating.module.deps sparse_set\sparse_set.ixx
[ 0%]: generating.module.deps src\main.cpp
[ 0%]: generating.module.deps src\unit.ixx
[ 8%]: compiling.headerunit.release format
[ 8%]: compiling.headerunit.release iostream
[ 8%]: compiling.headerunit.release math.h
[ 8%]: compiling.headerunit.release String
[ 8%]: compiling.module.release std
[ 8%]: compiling.module.release sparse_set
[ 43%]: compiling.module.release std.compat
[ 56%]: compiling.module.release unit
[ 56%]: archiving.release sparse_set.lib
[ 82%]: compiling.release src\main.cpp
[ 82%]: compiling.release src\glad.c
[ 91%]: linking.release sdlt3.exe
[100%]: build ok, spent 7.281s
PS D:\c++\sdlt3> xmake f -m debug
checking for platform ... windows
checking for architecture ... x64
checking for Microsoft Visual Studio (x64) version ... 2022
PS D:\c++\sdlt3> xmake
[ 52%]: archiving.debug sparse_set.lib
[ 91%]: linking.debug sdlt3.exe
error:
PS D:\c++\sdlt3> xmake
[ 91%]: linking.debug sdlt3.exe
error: build.objs\sdlt3\windows\x64\debug\src\unit.ixx.obj : warning LNK4042: 对象被多次指定；已忽略多余的指定
main.cpp.obj : error LNK2001: 无法解析的外部符号 "struct std::_Fake_allocator const std::_Fake_alloc" (?_Fake_alloc@std@@3U_Fake_allocator@1@B)
build\windows\x64\debug\sdlt3.exe : fatal error LNK1120: 1 个无法解析的外部命令

PS D:\c++\sdlt3> xmake -vwD
[ 91%]: linking.debug sdlt3.exe
"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.35.32215\bin\HostX64\x64\link.exe" -nologo -dynamicbase -nxcompat -machine:x64 -libpath:dependencies\lib -debug -pdb:build\windows\x64\debug\sdlt3.pdb -nodefaultlib:msvcrt.lib SDL2-static.lib User32.lib Shell32.lib Gdi32.lib Ole32.lib Winmm.lib Version.lib Imm32.lib Setupapi.lib Advapi32.lib OleAut32.lib build\stlmodules\cache\debug\std.ixx.ifc.obj build.objs\sdlt3\windows\x64\debug\src\unit.ixx.obj build\stlmodules\cache\debug\std.compat.ixx.ifc.obj -out:build\windows\x64\debug\sdlt3.exe build.objs\sdlt3\windows\x64\debug\src\main.cpp.obj build.objs\sdlt3\windows\x64\debug\src\unit.ixx.obj build.objs\sdlt3\windows\x64\debug\src\glad.c.obj
error: @programdir\modules\private\async\runjobs.lua:256: @programdir\actions\build\kinds\binary.lua:74: @programdir\modules\core\tools\link.lua:164: build.objs\sdlt3\windows\x64\debug\src\unit.ixx.obj : warning LNK4042: 对象被多次指定；已忽略多余的指定
main.cpp.obj : error LNK2001: 无法解析的外部符号 "struct std::_Fake_allocator const std::_Fake_alloc" (?_Fake_alloc@std@@3U_Fake_allocator@1@B)
build\windows\x64\debug\sdlt3.exe : fatal error LNK1120: 1 个无法解析的外部命令

stack traceback:
[C]: in function 'error'
[@programdir\core\base\os.lua:913]:
[@programdir\modules\core\tools\link.lua:164]: in function 'catch'
[@programdir\core\sandbox\modules\try.lua:123]: in function 'try'
[@programdir\modules\core\tools\link.lua:139]:
[C]: in function 'xpcall'
[@programdir\core\base\utils.lua:280]:
[@programdir\core\tool\linker.lua:222]: in function 'link'
[@programdir\actions\build\kinds\binary.lua:74]: in function 'callback'
[@programdir\modules\core\project\depend.lua:193]: in function 'on_changed'
[@programdir\actions\build\kinds\binary.lua:55]: in function '_do_link_target'
[@programdir\actions\build\kinds\binary.lua:102]:
[@programdir\actions\build\kinds\binary.lua:129]: in function '_link_target'
[@programdir\actions\build\kinds\binary.lua:157]: in function 'jobfunc'
[@programdir\modules\private\async\runjobs.lua:232]:
[C]: in function 'xpcall'
[@programdir\core\base\utils.lua:280]: in function 'trycall'
[@programdir\core\sandbox\modules\try.lua:117]: in function 'try'
[@programdir\modules\private\async\runjobs.lua:218]: in function 'cotask'
[@programdir\core\base\scheduler.lua:404]:

stack traceback:
[C]: in function 'error'
@programdir\core\base\os.lua:913: in function 'os.raiselevel'
(...tail calls...)
@programdir\modules\private\async\runjobs.lua:256: in field 'catch'
@programdir\core\sandbox\modules\try.lua:123: in global 'try'
@programdir\modules\private\async\runjobs.lua:218: in upvalue 'cotask'
@programdir\core\base\scheduler.lua:404: in function <@programdir\core\base\scheduler.lua:397>
PS D:\c++\sdlt3> xmake clean -a
PS D:\c++\sdlt3> xmake
checking for platform ... windows
checking for architecture ... x64
checking for Microsoft Visual Studio (x64) version ... 2022
[ 0%]: generating.module.deps sparse_set\sparse_set.ixx
[ 0%]: generating.module.deps src\main.cpp
[ 0%]: generating.module.deps src\unit.ixx
[ 8%]: compiling.headerunit.release iostream
[ 8%]: compiling.headerunit.release format
[ 8%]: compiling.headerunit.release math.h
[ 8%]: compiling.headerunit.release String
[ 8%]: compiling.module.release std
[ 8%]: compiling.module.release sparse_set
[ 43%]: compiling.module.release std.compat
[ 52%]: compiling.module.release unit
[ 56%]: archiving.release sparse_set.lib
[ 82%]: compiling.release src\main.cpp
[ 82%]: compiling.release src\glad.c
[ 91%]: linking.release sdlt3.exe
[100%]: build ok, spent 7.344s
PS D:\c++\sdlt3>
sdlt3.zip

[RI-ss]

编译完成后 移动一下代码，重新编译也会出现该情况