Python 3.14 and 3.13 fail to build on PPC64LE Fedora Rawhide: incomplete type ‘struct termio’

[vstinner]

PPC64LE Fedora Rawhide 3.x (GCC): https://buildbot.python.org/all/#/builders/455/builds/7290

gcc  -fno-strict-overflow -Wsign-compare -g -Og -Wall    -flto -fuse-linker-plugin -ffat-lto-objects -g -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden  -I../Include/internal -I../Include/internal/mimalloc -IObjects -IInclude -IPython -I. -I../Include   -fPIC -fPIC -c ../Modules/termios.c -o Modules/termios.o
In file included from /usr/include/asm/ioctl.h:12,
                 from /usr/include/asm/ioctls.h:5,
                 from /usr/include/bits/ioctls.h:23,
                 from /usr/include/sys/ioctl.h:26,
                 from ../Modules/termios.c:13:
../Modules/termios.c:1119:16: error: invalid application of ‘sizeof’ to incomplete type ‘struct termio’
 1119 |     {"TCGETA", TCGETA},
      |                ^~~~~~
../Modules/termios.c:1131:16: error: invalid application of ‘sizeof’ to incomplete type ‘struct termio’
 1131 |     {"TCSETA", TCSETA},
      |                ^~~~~~
../Modules/termios.c:1134:17: error: invalid application of ‘sizeof’ to incomplete type ‘struct termio’
 1134 |     {"TCSETAF", TCSETAF},
      |                 ^~~~~~~
../Modules/termios.c:1137:17: error: invalid application of ‘sizeof’ to incomplete type ‘struct termio’
 1137 |     {"TCSETAW", TCSETAW},
      |                 ^~~~~~~

PPC64LE Fedora Rawhide Clang 3.x (clang): https://buildbot.python.org/all/#/builders/33/builds/7515

clang  -fno-strict-overflow -Wsign-compare -g -Og -Wall    -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden  -I./Include/internal -I./Include/internal/mimalloc  -I. -I./Include    -fPIC -c ./Modules/termios.c -o Modules/termios.o
./Modules/termios.c:1119:16: error: invalid application of 'sizeof' to an incomplete type 'struct termio'
 1119 |     {"TCGETA", TCGETA},
      |                ^~~~~~

[vstinner]

cc @stratakis

[vstinner]

Same error on the 3.13 branch.

PPC64LE Fedora Rawhide Clang 3.13: https://buildbot.python.org/all/#/builders/1409/builds/592

./Modules/termios.c:1119:16: error: invalid application of 'sizeof' to an incomplete type 'struct termio'
 1119 |     {"TCGETA", TCGETA},
      |                ^~~~~~
/usr/include/asm/ioctls.h:26:17: note: expanded from macro 'TCGETA'
   26 | #define TCGETA          _IOR('t', 23, struct termio)
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/asm-generic/ioctl.h:84:60: note: expanded from macro '_IOR'
   84 | #define _IOR(type,nr,argtype)           _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(argtype)))
      |                                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/asm-generic/ioctl.h:75:28: note: expanded from macro '_IOC_TYPECHECK'
   75 | #define _IOC_TYPECHECK(t) (sizeof(t))
      |                            ^
/usr/include/asm-generic/ioctl.h:73:5: note: expanded from macro '_IOC'
   73 |          ((size) << _IOC_SIZESHIFT))
      |            ^~~~
./Modules/termios.c:1119:16: note: forward declaration of 'struct termio'
/usr/include/asm/ioctls.h:26:38: note: expanded from macro 'TCGETA'
   26 | #define TCGETA          _IOR('t', 23, struct termio)
      |                                              ^

[stratakis]

This started happening after GCC was updated from 15 to 15.1.

[yselkowitz]

This is actually due to an updated glibc snapshot in rawhide: https://lists.fedoraproject.org/archives/list/[email protected]/message/5E553SEIQLUFO66BEDBRSJLT3RKNYZXI/

[tuliom]

IMHO, the glibc update just exposed an issue in the kernel headers.
FYI: https://bugzilla.redhat.com/show_bug.cgi?id=2363674

[hroncok]

For the record, this impacts all the supported Python versions.

[vstinner]

IMHO, the glibc update just exposed an issue in the kernel headers.
FYI: https://bugzilla.redhat.com/show_bug.cgi?id=2363674

The issue was reported to linuxppc upstream: linuxppc/issues#488