[Bug binutils/31614] New: [2.40 Regression] LD fails to link thin archive

[timo.kreuzer at reactos dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31614

            Bug ID: 31614
           Summary: [2.40 Regression] LD fails to link thin archive
           Product: binutils
           Version: 2.40
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: timo.kreuzer at reactos dot org
  Target Milestone: ---

Since version 2.40 LD fails to link (certain?) archives in thin format.

Test case:

1. Create the following file as oldnames.def:
----
LIBRARY msvcrt.dll

EXPORTS
eof==_eof
----

2. Create an import lib with the command "dlltool.exe --def oldnames.def
--output-lib=oldnames.a -t oldnames"

3. Convert the import lib to thin format with the command "ar.exe crT
liboldnames.a oldnames.a"

4. Create the following file as bug.c:
----
extern int eof(int fd);

int main() {
    return eof(0);
}
----

5. Compile bug.c with "gcc -o bug.obj -c bug.c"

6. Link bug.exe with "gcc bug.obj liboldnames.a -o bug.exe"


Expected behavior: It links the executable.

Observed behavior (with ld 2.40, 2.41, 2.42): ld fails with an error:
"collect2.exe: error: ld returned 5 exit status"

Using binutils 2.42 and only replacing ld.exe with version 2.39 fixes the
issue.

Please note that the process above is a simple example for an integral part of
the ReactOS build process and suggestions like "just don't convert the import
lib to thin format" are not helpful.

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