Problem building cygwin-3_1_7-release tagged newlib.

Problem building cygwin-3_1_7-release tagged newlib.

[Kaz Kylheku (Cygwin)]

Hi,

I'm trying to build the 3.1.7 tagged newlib. It runs into this problem:

c++wrap -O2 -g -fno-rtti -fno-exceptions -fno-use-cxa-atexit -Wall 
-Wstrict-aliasing -Wwrite-strings -fno-common -pipe -fbuiltin 
-fmessage-length=0 -MMD -Wimplicit-fallthrough=5 -Werror 
-fmerge-constants -ftracer -c -o _cygwin_crt0_common.o 
../../.././winsup/cygwin/lib/_cygwin_crt0_common.cc
In file included from ../../.././winsup/cygwin/winsup.h:83,
                  from 
../../.././winsup/cygwin/lib/_cygwin_crt0_common.cc:9:
../../.././winsup/cygwin/winlean.h:104:16: error: redefinition of 
'struct _MEM_ADDRESS_REQUIREMENTS'
   104 | typedef struct _MEM_ADDRESS_REQUIREMENTS
       |                ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/w32api/minwindef.h:163,
                  from /usr/include/w32api/windef.h:9,
                  from /usr/include/w32api/windows.h:69,
                  from ../../.././winsup/cygwin/winlean.h:56,
                  from ../../.././winsup/cygwin/winsup.h:83,
                  from 
../../.././winsup/cygwin/lib/_cygwin_crt0_common.cc:9:
/usr/include/w32api/winnt.h:4896:18: note: previous definition of 
'struct _MEM_ADDRESS_REQUIREMENTS'
  4896 |   typedef struct _MEM_ADDRESS_REQUIREMENTS {
       |                  ^~~~~~~~~~~~~~~~~~~~~~~~~

This looks like a clash between the installed toolchain header and the 
one in the winsup tree?

Is this a known problem?

Maybe I shouldn't be using the native Cygwin compiler for rebuilding the 
Cygwin DLL; what is the right way?

Re: Problem building cygwin-3_1_7-release tagged newlib.

[Ken Brown]

On 10/10/2020 3:22 PM, Kaz Kylheku (Cygwin) via Cygwin wrote:
> Hi,
> 
> I'm trying to build the 3.1.7 tagged newlib. It runs into this problem:
> 
> c++wrap -O2 -g -fno-rtti -fno-exceptions -fno-use-cxa-atexit -Wall 
> -Wstrict-aliasing -Wwrite-strings -fno-common -pipe -fbuiltin -fmessage-length=0 
> -MMD -Wimplicit-fallthrough=5 -Werror -fmerge-constants -ftracer -c -o 
> _cygwin_crt0_common.o ../../.././winsup/cygwin/lib/_cygwin_crt0_common.cc
> In file included from ../../.././winsup/cygwin/winsup.h:83,
>                   from ../../.././winsup/cygwin/lib/_cygwin_crt0_common.cc:9:
> ../../.././winsup/cygwin/winlean.h:104:16: error: redefinition of 'struct 
> _MEM_ADDRESS_REQUIREMENTS'
>    104 | typedef struct _MEM_ADDRESS_REQUIREMENTS
>        |                ^~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from /usr/include/w32api/minwindef.h:163,
>                   from /usr/include/w32api/windef.h:9,
>                   from /usr/include/w32api/windows.h:69,
>                   from ../../.././winsup/cygwin/winlean.h:56,
>                   from ../../.././winsup/cygwin/winsup.h:83,
>                   from ../../.././winsup/cygwin/lib/_cygwin_crt0_common.cc:9:
> /usr/include/w32api/winnt.h:4896:18: note: previous definition of 'struct 
> _MEM_ADDRESS_REQUIREMENTS'
>   4896 |   typedef struct _MEM_ADDRESS_REQUIREMENTS {
>        |                  ^~~~~~~~~~~~~~~~~~~~~~~~~
> 
> This looks like a clash between the installed toolchain header and the one in 
> the winsup tree?
> 
> Is this a known problem?

Yes.  It was caused by a mingw-w64 update and was fixed in commit c1f7c4d1.

Ken

Re: Problem building cygwin-3_1_7-release tagged newlib.

[Kaz Kylheku (Cygwin)]

On 2020-10-10 12:39, Ken Brown wrote:
> On 10/10/2020 3:22 PM, Kaz Kylheku (Cygwin) via Cygwin wrote:
>>   4896 |   typedef struct _MEM_ADDRESS_REQUIREMENTS {
>>        |                  ^~~~~~~~~~~~~~~~~~~~~~~~~
>> 
>> This looks like a clash between the installed toolchain header and the 
>> one in the winsup tree?
>> 
>> Is this a known problem?
> 
> Yes.  It was caused by a mingw-w64 update and was fixed in commit 
> c1f7c4d1.

Much thanks for that; it got past this stumbling block. After that there 
were
a bunch of GCC-10 fixes I had to find and cherry pick, and it built.