[Bug d/95184] New: GDC reporting multiple definitions of functions where DMD and LDC do not

[oss at cogitri dot dev]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95184

            Bug ID: 95184
           Summary: GDC reporting multiple definitions of functions where
                    DMD and LDC do not
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: oss at cogitri dot dev
  Target Milestone: ---

Created attachment 48556
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48556&action=edit
Full build log

When compiling glibd 2.1.0 with gir-to-d 0.21 with gdc 9.3.0 it errors out,
complaining about multiple definitions of functions:

/usr/lib/gcc/x86_64-alpine-linux-musl/9.3.0/../../../../x86_64-alpine-linux-musl/bin/ld:
glibd-2.0@sha/output_generated_gio_DataInputStream.d.o: in function
`_DT56_D3gio19BufferedInputStream19BufferedInputStream9__mixin1517getSeekableStructMFbZPS3gio1c5types9GSeekable':
DataInputStream.d:(.text+0x1be4): multiple definition of
`_DT56_D3gio19BufferedInputStream19BufferedInputStream9__mixin1517getSeekableStructMFbZPS3gio1c5types9GSeekable';
glibd-2.0@sha/output_generated_gio_BufferedInputStream.d.o:BufferedInputStream.d:(.text+0x10c):
first defined here

Since the source is generated via gir-to-d I don't think providing the source
makes much sense here, if you need assistance in building glibd I can help