RFR: 8345744: Use C++ LINK_TYPE with SetupBuildLauncher in StaticLibs.gmk

[Jiangli Zhou]

On Mon, 9 Dec 2024 18:51:15 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Please review following fix for linking static JDK launcher, thanks.
>> 
>> - Set LINK_TYPE to C++ when building the static launcher to make sure LDCXX instead of LD is used for linking.
>> 
>> - Remove -l:libstdc++. For linux, -static-libstdc++ is already set in STATIC_STDCXX_FLAGS. See https://github.com/openjdk/jdk/blob/e0d639878346946d0627a57b0eeb0cac8ca533fc/make/autoconf/lib-std.m4#L50.
>> 
>> See more details in https://bugs.openjdk.org/browse/JDK-8345744.
>
> I verified locally that removing -lstdc++ works fine. 
> 
> In fact, you are already changing macOS, since the LINK_TYPE affects all platforms.

Thanks for the review, @magicus!

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PR Comment: https://git.openjdk.org/jdk/pull/22624#issuecomment-2529559464