[Bug 52338] New: Cygwin compilation fails: undefined reference to `_imp____acrt_iob_func' in winecrt0/debug.c

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52338

Bug ID: 52338
           Summary: Cygwin compilation fails: undefined reference to
                    `_imp____acrt_iob_func' in winecrt0/debug.c
           Product: Wine
           Version: 7.0-rc4
          Hardware: x86-64
                OS: Windows
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P2
         Component: build-env
          Assignee: [e-mail]
          Reporter: [e-mail]

(This is continuation from the bug 52328)

--- snip ---
tools/winegcc/winegcc.exe -o dlls/dxgi/dxgi.dll --wine-objdir .
-Wl,--disable-stdcall-fixup \
  -fasynchronous-unwind-tables -shared dlls/dxgi/dxgi.spec -mcygwin
dlls/dxgi/adapter.o \
  dlls/dxgi/device.o dlls/dxgi/dxgi_main.o dlls/dxgi/factory.o
dlls/dxgi/output.o \
  dlls/dxgi/surface.o dlls/dxgi/swapchain.o dlls/dxgi/utils.o
dlls/dxgi/version.res \
  dlls/gdi32/libgdi32.a libs/dxguid/libdxguid.a libs/uuid/libuuid.a
dlls/wined3d/libwined3d.a \
  dlls/user32/libuser32.a dlls/win32u/libwin32u.a dlls/winecrt0/libwinecrt0.a \
  dlls/kernel32/libkernel32.a dlls/ntdll/libntdll.a
/usr/lib/gcc/i686-pc-cygwin/11/../../../../i686-pc-cygwin/bin/ld:
dlls/winecrt0/libwinecrt0.a(debug.o): in function `fallback__wine_dbg_output':
/home/saukrs/src/wine/dlls/winecrt0/debug.c:178: undefined reference to
`_imp____acrt_iob_func'
/usr/lib/gcc/i686-pc-cygwin/11/../../../../i686-pc-cygwin/bin/ld:
dlls/winecrt0/libwinecrt0.a(debug.o): in function `fallback__wine_dbg_header':
/home/saukrs/src/wine/dlls/winecrt0/debug.c:203: undefined reference to
`_imp____acrt_iob_func'
collect2: error: ld returned 1 exit status
winegcc: /usr/bin/gcc.exe failed
make: *** [Makefile:57380: dlls/dxgi/dxgi.dll] Error 2
--- snip ---

[Bug 52338] Cygwin compilation fails: undefined reference to `_imp____acrt_iob_func' in winecrt0/debug.c

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52338

Saulius K.  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P2                          |P4

--- Comment #1 from Saulius K.  ---
If I add -lmsvcrt, the library gets built:

--- snip ---
$ tools/winegcc/winegcc.exe -o dlls/dxgi/dxgi.dll --wine-objdir .
-Wl,--disable-stdcall-fixup \
  -fasynchronous-unwind-tables -shared dlls/dxgi/dxgi.spec -mcygwin
dlls/dxgi/adapter.o \
  dlls/dxgi/device.o dlls/dxgi/dxgi_main.o dlls/dxgi/factory.o
dlls/dxgi/output.o \
  dlls/dxgi/surface.o dlls/dxgi/swapchain.o dlls/dxgi/utils.o
dlls/dxgi/version.res \
  dlls/gdi32/libgdi32.a libs/dxguid/libdxguid.a libs/uuid/libuuid.a
dlls/wined3d/libwined3d.a \
  dlls/user32/libuser32.a dlls/win32u/libwin32u.a dlls/winecrt0/libwinecrt0.a \
  dlls/kernel32/libkernel32.a dlls/ntdll/libntdll.a -lmsvcrt
--- snip ---

--- snip ---
$ ls -l dlls/dxgi/dxgi.dll
-rwxr-xr-x 1 saukrs None 1020855 Jan  4 16:23 dlls/dxgi/dxgi.dll
--- snip ---

[Bug 52338] Cygwin compilation fails: undefined reference to `_imp____acrt_iob_func' in winecrt0/debug.c

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52338

Jacek Caban  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
                 CC|                            |[e-mail]

--- Comment #2 from Jacek Caban  ---
It may seem weird, but I don't see a way to support -mcygwin on Cygwin :)

winecrt0 is linked to both modules converted to PE files and not converted
ones. On PE targets, it means that those debug functions get linked to all
modules. They need to get stderr, which depends on crt used. In -mcygwin case
we should use Cygwin libc, but it was earlier built with msvcrt definitions. We
get away with it on mingw because mingw crt is compatible with msvcrt in this
case.

I don't see an easy way around it, you may disable problematic modules with
configure options for now. The problem will not exist once we convert remaining
modules to PE files.

[Bug 52338] Cygwin compilation fails: undefined reference to `_imp____acrt_iob_func' in winecrt0/debug.c

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52338

--- Comment #3 from Saulius K.  ---
Thanks for clear explanation and the tip.

Do we have the bug/issue for converting remaining modules to PE files?
It would be nice to add it as a blocker.

[Bug 52338] Cygwin compilation fails: undefined reference to `_imp____acrt_iob_func' in winecrt0/debug.c

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52338

--- Comment #4 from Saulius K.  ---
Two other dlls that fails in similar manner:

dlls/wined3d/wined3d.dll
dlls/opengl32/opengl32.dll