Problem building cygwin-3_1_7-release tagged newlib.

Ken Brown kbrown@cornell.edu
Sat Oct 10 19:39:25 GMT 2020



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


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