[Bug ada/82393] New: Compilation error on cygwin64

["didu31 at hotmail dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82393

            Bug ID: 82393
           Summary: Compilation error on cygwin64
           Product: gcc
           Version: 7.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
          Assignee: unassigned at gcc dot gnu.org
          Reporter: didu31 at hotmail dot fr
  Target Milestone: ---

System : cygwin64 on windows 10 64bit
configuration :  /cygdrive/c/Users/didier/git/gcc/configure --enable-libada
--enable-lto  --with-cloog=/usr/local --with-isl=/usr/local/ 
--enable-languages=c,c++,ada

When building gcc, compilation complains _O_BINARY and _O_TEXT are undefined.
This seems normal as they are windows-specific.
It seems, regarding similar bug reports (for other open source software) on the
web that they are defined in cygwin32 fcntl.h, nevertheless.

Here is the raw report :

/home/didier/gcc-build-7.2/./gcc/xgcc -v -save-temps
-B/home/didier/gcc-build-7.2/./gcc/ -B/usr/local/x86_64-unknown-cygwin/bin/
-B/usr/local/x86_64-unknown-cygwin/lib/ -isystem
/usr/local/x86_64-unknown-cygwin/include -isystem
/usr/local/x86_64-unknown-cygwin/sys-include -c -DIN_GCC  -W -Wall -g -O2 -g
-O2 -fexceptions -DIN_RTS -DHAVE_GETIPINFO -iquote . -iquote .. -iquote ../..
-iquote /cygdrive/c/Users/didier/git/gcc/gcc/ada -iquote
/cygdrive/c/Users/didier/git/gcc/gcc -I/cygdrive/c/Users/didier/git/gcc/include
 -I./../.. sysdep.c -o sysdep.o

Reading specs from /home/didier/gcc-build-7.2/./gcc/specs
COLLECT_GCC=/home/didier/gcc-build-7.2/./gcc/xgcc
Target: x86_64-unknown-cygwin
Configured with: /cygdrive/c/Users/didier/git/gcc/configure --enable-libada
--enable-lto --with-cloog=yes --with-isl=/usr/local/
--enable-languages=c,c++,ada
Thread model: single
gcc version 7.2.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-B' '/home/didier/gcc-build-7.2/./gcc/'
'-B' '/usr/local/x86_64-unknown-cygwin/bin/' '-B'
'/usr/local/x86_64-unknown-cygwin/lib/' '-isystem'
'/usr/local/x86_64-unknown-cygwin/include' '-isystem'
'/usr/local/x86_64-unknown-cygwin/sys-include' '-c' '-D' 'IN_GCC' '-Wextra'
'-Wall' '-g' '-O2' '-g' '-O2' '-fexceptions' '-D' 'IN_RTS' '-D'
'HAVE_GETIPINFO' '-iquote' '.' '-iquote' '..' '-iquote' '../..' '-iquote'
'/cygdrive/c/Users/didier/git/gcc/gcc/ada' '-iquote'
'/cygdrive/c/Users/didier/git/gcc/gcc' '-I'
'/cygdrive/c/Users/didier/git/gcc/include' '-I' './../..' '-o' 'sysdep.o'
'-mtune=generic' '-march=x86-64'
 /home/didier/gcc-build-7.2/./gcc/cc1.exe -E -quiet -v -I
/cygdrive/c/Users/didier/git/gcc/include -I ./../.. -iprefix
/home/didier/gcc-build-7.2/gcc/../lib/gcc/x86_64-unknown-cygwin/7.2.0/ -isystem
/home/didier/gcc-build-7.2/./gcc/include -isystem
/home/didier/gcc-build-7.2/./gcc/include-fixed -Dunix -idirafter
/usr/lib/../lib/../include/w32api -idirafter ../../include/w32api -D IN_GCC -D
IN_RTS -D HAVE_GETIPINFO -isystem /usr/local/x86_64-unknown-cygwin/include
-isystem /usr/local/x86_64-unknown-cygwin/sys-include -iquote . -iquote ..
-iquote ../.. -iquote /cygdrive/c/Users/didier/git/gcc/gcc/ada -iquote
/cygdrive/c/Users/didier/git/gcc/gcc sysdep.c -mtune=generic -march=x86-64
-Wextra -Wall -fexceptions -g -g -fworking-directory -O2 -O2 -fpch-preprocess
-o sysdep.i
ignoring nonexistent directory "/usr/local/x86_64-unknown-cygwin/include"
ignoring nonexistent directory "/usr/local/x86_64-unknown-cygwin/sys-include"
ignoring nonexistent directory
"/home/didier/gcc-build-7.2/gcc/../lib/gcc/x86_64-unknown-cygwin/7.2.0/include"
ignoring nonexistent directory
"/home/didier/gcc-build-7.2/gcc/../lib/gcc/x86_64-unknown-cygwin/7.2.0/include-fixed"
ignoring nonexistent directory
"/home/didier/gcc-build-7.2/gcc/../lib/gcc/x86_64-unknown-cygwin/7.2.0/../../../../x86_64-unknown-cygwin/include"
ignoring nonexistent directory
"/home/didier/gcc-build-7.2/gcc/../lib/gcc/../../lib/gcc/x86_64-unknown-cygwin/7.2.0/include"
ignoring nonexistent directory
"/home/didier/gcc-build-7.2/gcc/../lib/gcc/../../lib/gcc/x86_64-unknown-cygwin/7.2.0/include-fixed"
ignoring nonexistent directory
"/home/didier/gcc-build-7.2/gcc/../lib/gcc/../../lib/gcc/x86_64-unknown-cygwin/7.2.0/../../../../x86_64-unknown-cygwin/include"
ignoring nonexistent directory "../../include/w32api"
#include "..." search starts here:
 .
 ..
 ../..
 /cygdrive/c/Users/didier/git/gcc/gcc/ada
 /cygdrive/c/Users/didier/git/gcc/gcc
#include <...> search starts here:
 /cygdrive/c/Users/didier/git/gcc/include
 ./../..
 /home/didier/gcc-build-7.2/./gcc/include
 /home/didier/gcc-build-7.2/./gcc/include-fixed
 /usr/local/include
 /usr/include
 /usr/lib/../lib/../include/w32api
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-B' '/home/didier/gcc-build-7.2/./gcc/'
'-B' '/usr/local/x86_64-unknown-cygwin/bin/' '-B'
'/usr/local/x86_64-unknown-cygwin/lib/' '-isystem'
'/usr/local/x86_64-unknown-cygwin/include' '-isystem'
'/usr/local/x86_64-unknown-cygwin/sys-include' '-c' '-D' 'IN_GCC' '-Wextra'
'-Wall' '-g' '-O2' '-g' '-O2' '-fexceptions' '-D' 'IN_RTS' '-D'
'HAVE_GETIPINFO' '-iquote' '.' '-iquote' '..' '-iquote' '../..' '-iquote'
'/cygdrive/c/Users/didier/git/gcc/gcc/ada' '-iquote'
'/cygdrive/c/Users/didier/git/gcc/gcc' '-I'
'/cygdrive/c/Users/didier/git/gcc/include' '-I' './../..' '-o' 'sysdep.o'
'-mtune=generic' '-march=x86-64'
 /home/didier/gcc-build-7.2/./gcc/cc1.exe -fpreprocessed sysdep.i -quiet
-dumpbase sysdep.c -mtune=generic -march=x86-64 -auxbase-strip sysdep.o -g -g
-O2 -O2 -Wextra -Wall -version -fexceptions -o sysdep.s
GNU C11 (GCC) version 7.2.0 (x86_64-unknown-cygwin)
        compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version
3.1.5-p10, MPC version 1.0.3, isl version isl-0.15-GMP

GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (GCC) version 7.2.0 (x86_64-unknown-cygwin)
        compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version
3.1.5-p10, MPC version 1.0.3, isl version isl-0.15-GMP

GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 48e22b895796c0b5999b4c63d201b33b
sysdep.c: In function '__gnat_set_mode':
sysdep.c:195:13: error: '_O_BINARY' undeclared (first use in this function)
     case 0 : WIN_SETMODE (handle, _O_BINARY);          break;
             ^~~~~~~~~
sysdep.c:195:13: note: each undeclared identifier is reported only once for
each function it appears in
sysdep.c:197:13: error: '_O_TEXT' undeclared (first use in this function); did
you mean 'CONTEXT'?
     case 2 : WIN_SETMODE (handle, _O_TEXT);            break;
             ^~~~~~~
             CONTEXT