[Bug 56973] New: Building wine with mingw/gcc 14.1.1 fails with error '-Wimplicit-function-declaration'

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56973

Bug ID: 56973
           Summary: Building wine with mingw/gcc 14.1.1 fails with  error
                    '-Wimplicit-function-declaration'
           Product: Wine
           Version: 9.13
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build-env
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

After updating mingw/gcc to 14.1.0 wine fails to build with error:

< i686-w64-mingw32-gcc -c -o dlls/msxml3/i386-windows/domdoc.o
dlls/msxml3/domdoc.c -Idlls/msxml3 -Iinclude -Iinclude/msvcrt \
  -I/usr/i686-w64-mingw32/sys-root/mingw/include/libxml2 -D_UCRT -D__WINESRC__
-D__WINE_PE_BUILD \
  -Wall -fno-strict-aliasing -Wdeclaration-after-statement -Wempty-body
-Wignored-qualifiers \
  -Winit-self -Wno-packed-not-aligned -Wshift-overflow=2 -Wstrict-prototypes
-Wtype-limits \
  -Wunused-but-set-parameter -Wvla -Wwrite-strings -Wpointer-arith -Wlogical-op
-Wabsolute-value \
  -Wenum-conversion -Wno-misleading-indentation -fno-omit-frame-pointer
-mpreferred-stack-boundary=2 \
  -gdwarf-4 -g -O2
dlls/msxml3/domdoc.c: In function 'doparse':
dlls/msxml3/domdoc.c:546:9: error: initialization of 'void (*)(void *, const
xmlError *)' {aka 'void (*)(void *, const struct _xmlError *)'} from
incompatible pointer type 'void (*)(void *, xmlError *)' {aka 'void (*)(void *,
struct _xmlError *)'} [-Wincompatible-pointer-types]
  546 |         sax_serror                      /* serror */
      |         ^~~~~~~~~~
dlls/msxml3/domdoc.c:546:9: note: (near initialization for
'sax_handler.serror')
make: *** [Makefile:78873: dlls/msxml3/i386-windows/domdoc.o] Error 1 >

Adding "-Wno-error=incompatible-pointer-types" to CROSSCFLAGS seems to
circumvent this error but run into the following error:

<i686-w64-mingw32-gcc -c -o dlls/msxml3/i386-windows/main.o dlls/msxml3/main.c
-Idlls/msxml3 -Iinclude -Iinclude/msvcrt \
  -I/usr/i686-w64-mingw32/sys-root/mingw/include/libxml2 -D_UCRT -D__WINESRC__
-D__WINE_PE_BUILD \
  -Wall -fno-strict-aliasing -Wdeclaration-after-statement -Wempty-body
-Wignored-qualifiers \
  -Winit-self -Wno-packed-not-aligned -Wshift-overflow=2 -Wstrict-prototypes
-Wtype-limits \
  -Wunused-but-set-parameter -Wvla -Wwrite-strings -Wpointer-arith -Wlogical-op
-Wabsolute-value \
  -Wenum-conversion -Wno-misleading-indentation -fno-omit-frame-pointer
-mpreferred-stack-boundary=2 \
  -Wno-error=incompatible-pointer-types
dlls/msxml3/main.c: In function 'DllMain':
dlls/msxml3/main.c:360:9: error: implicit declaration of function
'xmlThrDefTreeIndentString'; did you mean 'xmlTreeIndentString'?
[-Wimplicit-function-declaration]
  360 |         xmlThrDefTreeIndentString("\t");
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~
      |         xmlTreeIndentString
make: *** [Makefile:79085: dlls/msxml3/i386-windows/main.o] Error 1 >

which have been mitigated by adding
"-Wno-error=-Wimplicit-function-declaration", and that allowed wine to build
successfully.

This doesn't happen using mingw/gcc 13.2 or 12.2

If any other details/tests requests are needed will gladly provide.