一个静态库由其他两个静态库生成的情况,xmake应该怎样写?

[likun123687]

有两个静态库a,b.静态库c由a,b合并生成,target c应该怎样写呢?

target("a")
    set_kind("static")
    add_files("a.cpp")
target_end()

target("b")
    set_kind("static")
    add_files("b.cpp")
target_end()

target("c")
    set_kind("static")
    add_deps("a", "b")
target_end()

这样写的话,会报错.

brucelee@brucedeMacBook-Pro mass]$ xmake -v
[ 86%]: archiving.release libc.a
"/usr/bin/xcrun -sdk macosx ar" -cr build/macosx/x86_64/release/libc.a
error: ar: no archive members specified
usage:  ar -d [-TLsv] archive file ...
        ar -m [-TLsv] archive file ...
        ar -m [-abiTLsv] position archive file ...
        ar -p [-TLsv] archive [file ...]
        ar -q [-cTLsv] archive file ...
        ar -r [-cuTLsv] archive file ...
        ar -r [-abciuTLsv] position archive file ...
        ar -t [-TLsv] archive [file ...]
        ar -x [-ouTLsv] archive [file ...]

[waruqi]

参考 https://github.com/xmake-io/xmake/blob/master/tests/projects/other/merge_archive2/xmake.lua

[likun123687]

我试了一下,发现target必须要有一个add_files才可以
也就是

target("c")
    set_kind("static")
    add_deps("a", "b")
    set_policy("build.merge_archive", true)
    add_files("c.cpp")
target_end()

是可以的,但是如果target c没有add_files的时候,还是会报错

target("c")
    set_kind("static")
    add_deps("a", "b")
    set_policy("build.merge_archive", true)
target_end()

brucelee@brucedeMacBook-Pro mass]$ xmake -v
[ 86%]: archiving.release libc.a
"/usr/bin/xcrun -sdk macosx ar" -cr build/macosx/x86_64/release/libc.a
error: ar: no archive members specified
usage:  ar -d [-TLsv] archive file ...
        ar -m [-TLsv] archive file ...
        ar -m [-abiTLsv] position archive file ...
        ar -p [-TLsv] archive [file ...]
        ar -q [-cTLsv] archive file ...
        ar -r [-cuTLsv] archive file ...
        ar -r [-abciuTLsv] position archive file ...
        ar -t [-TLsv] archive [file ...]
        ar -x [-ouTLsv] archive [file ...]

[likun123687]

暂时在target c add_fiels一个空cpp文件了,没找到什么好的方法

[waruqi]

加个空文件就行了，或者加一下 add_rules("c++") 或者自己走 merge_staticlib 脚本调用，#1638

[likun123687]

好的,感谢