RFR: 8352481: Enforce the use of lld with clang [v7]

[SendaoYan]

On Thu, 27 Mar 2025 02:21:30 GMT, SendaoYan <syan at openjdk.org> wrote:

>> SendaoYan has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Force use of lld when build os is not macosx
>
> make/autoconf/toolchain.m4 line 625:
> 
>> 623:     # Force use of lld, since that is what we expect when setting flags later on
>> 624:     if test "x$TOOLCHAIN_TYPE" = xclang; then
>> 625:       if test "x$OPENJDK_BUILD_OS" != "xmacosx"; then
> 
> According to the implementation of makefile function `FLAGS_SETUP_LDFLAGS_HELPER` which locate in make/autoconf/flags-ldflags.m4 file, only the combination of `$TOOLCHAIN_TYPE == clang` and `$OPENJDK_TARGET_OS == linux` support lld linker.

> @sendaoYan fyi, i've raised a new bug as this fails to build on AIX clang: https://bugs.openjdk.org/browse/JDK-8353658

Hi @andrew-m-leonard, The new bug you mentioned seems duplicated to [JDK-8353005](https://bugs.openjdk.org/browse/JDK-8353005). Could you check that, thanks.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/24125#discussion_r2027273470