[Bug binutils/28929] New: binutils 2.38 ar: issue when updating thin static libraries (malformed archive)

[luca.bacci at outlook dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28929

            Bug ID: 28929
           Summary: binutils 2.38 ar: issue when updating thin static
                    libraries (malformed archive)
           Product: binutils
           Version: 2.38
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: luca.bacci at outlook dot com
  Target Milestone: ---

Hello,

We recently found an issue in MSYS2 related to the overwriting (update) of thin
static library archives by gcc-ar, which is solved by downgrading binutils from
version 2.38 to version 2.37.

Specifically, what happens is that if a given thin static library archive is
updated by replacing an existing object file with a different version, the
resulting archive will be malformed.

More details can be found in the related MSYS2 issue on GitHub:
https://github.com/msys2/MINGW-packages/issues/10860

I remain at your disposal for informations,
Many thanks!
Luca

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