RFR: 8345265: Fix gcc LTO without disabling LTO for g1ParScanThreadState.cpp

Tue Dec 17 14:54:04 UTC 2024

On Sun, 8 Dec 2024 05:07:58 GMT, Julian Waters <jwaters at openjdk.org> wrote:

> This needs a name and description change, I'll do so later. @MBaesken does this fix LTO on your end? Kim also reports that LTO hangs indefinitely alongside several warning messages, do you have similar issues when you try to enable LTO?

When I try to build with this change  (with and without lto enabled) I run into  

/openjdk/tools/devkits/x86_64-linux-gnu-to-x86_64-linux-gnu-fedora27-gcc11.3.0/x86_64-linux-gnu/sysroot/usr/include/unistd.h:520:14: error: conflicting declaration of 'char* get_current_dir_name()' with 'C' linkage
  520 | extern char *get_current_dir_name (void) __THROW;
      |              ^~~~~~~~~~~~~~~~~~~~

(maybe it is related to the devkit, maybe to pch I don't know)

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PR Comment: https://git.openjdk.org/jdk/pull/22464#issuecomment-2527527380