[Bug 41712] New: lto build is broken

https://bugs.winehq.org/show_bug.cgi?id=41712

Bug ID: 41712
           Summary: lto build is broken
           Product: Wine
           Version: 1.9.22
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build-env
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Compiling WINE with "-flto" in LDFLAGS breaks the build for link-time. The
problem boils down to the following minimal example:

$ cat main.c
    void foo();

int main() {
            foo();
    }
    $ cat foo.c 
    void foo() { }
    $ winegcc -c -flto foo.c  
    $ winegcc main.c foo.o  
    /usr/lib/wine/libwinecrt0.a(exe_entry.o): In function
`__wine_spec_exe_entry':
    (.text+0x8d): undefined reference to `ExitProcess'
    /usr/bin/ld: a.out.so: hidden symbol `ExitProcess' isn't defined
    /usr/bin/ld: final link failed: Bad value
    collect2: error: ld returned 1 exit status
    winegcc: gcc failed

Simply removing the "-flto" option from the steps fixes the build.