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gh-85277: Fix building without stropts.h or empty stropts.h #143521

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Merged
vstinner merged 7 commits into from
Mar 10, 2026
Merged

gh-85277: Fix building without stropts.h or empty stropts.h #143521

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cc5d3e3
Fix building without stropts.h
shadchin Jan 7, 2026
2410cb6
Switch to `AC_CHECK_DECL`
shadchin Jan 8, 2026
2cbad39
fix style
shadchin Jan 8, 2026
7f8793f
Add News
shadchin Jan 8, 2026
93ceb4e
regen-configure
shadchin Jan 8, 2026
85b709e
fix lint
shadchin Jan 9, 2026
ba8f793
fix style
shadchin Jan 9, 2026
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Build/2026-01-08-22-27-07.gh-issue-85277.TotySi.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix building without ``stropts.h`` or empty ``stropts.h``
4 changes: 2 additions & 2 deletions Modules/posixmodule.c
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Expand Up @@ -9384,13 +9384,13 @@ os_openpty_impl(PyObject *module)
if (_Py_set_inheritable(master_fd, 0, NULL) < 0)
goto posix_error;

#if !defined(__CYGWIN__) && !defined(__ANDROID__) && !defined(HAVE_DEV_PTC)
#if defined(HAVE_STROPTS_H) && !defined(HAVE_DEV_PTC)
ioctl(slave_fd, I_PUSH, "ptem"); /* push ptem */
ioctl(slave_fd, I_PUSH, "ldterm"); /* push ldterm */
#ifndef __hpux
ioctl(slave_fd, I_PUSH, "ttcompat"); /* push ttcompat */
#endif /* __hpux */
#endif /* HAVE_CYGWIN */
#endif /* defined(HAVE_STROPTS_H) && !defined(HAVE_DEV_PTC) */
#endif /* HAVE_OPENPTY */

return Py_BuildValue("(ii)", master_fd, slave_fd);
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295 changes: 152 additions & 143 deletions configure
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10 changes: 9 additions & 1 deletion configure.ac
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Expand Up @@ -3010,7 +3010,7 @@ AC_CHECK_HEADERS([ \
io.h langinfo.h libintl.h libutil.h linux/auxvec.h sys/auxv.h linux/fs.h linux/limits.h linux/memfd.h \
linux/netfilter_ipv4.h linux/random.h linux/soundcard.h linux/sched.h \
linux/tipc.h linux/wait.h netdb.h net/ethernet.h netinet/in.h netpacket/packet.h poll.h process.h pthread.h pty.h \
sched.h setjmp.h shadow.h signal.h spawn.h stropts.h sys/audioio.h sys/bsdtty.h sys/devpoll.h \
sched.h setjmp.h shadow.h signal.h spawn.h sys/audioio.h sys/bsdtty.h sys/devpoll.h \
sys/endian.h sys/epoll.h sys/event.h sys/eventfd.h sys/file.h sys/ioctl.h sys/kern_control.h \
sys/loadavg.h sys/lock.h sys/memfd.h sys/mkdev.h sys/mman.h sys/modem.h sys/param.h sys/pidfd.h sys/poll.h \
sys/random.h sys/resource.h sys/select.h sys/sendfile.h sys/socket.h sys/soundcard.h sys/stat.h \
Expand All @@ -3021,6 +3021,14 @@ AC_CHECK_HEADERS([ \
AC_HEADER_DIRENT
AC_HEADER_MAJOR

# On Linux, stropts.h may be empty
AC_CHECK_DECL([I_PUSH], [AC_DEFINE([HAVE_STROPTS_H], [1], [Define to 1 if you have the <stropts.h> header file.])], [], [
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <stropts.h>
])
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@picnixz picnixz Jan 9, 2026 •
edited
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Suggested change
AC_CHECK_DECL([I_PUSH], [AC_DEFINE([HAVE_STROPTS_H], [1], [Define to 1 if you have the <stropts.h> header file.])], [], [
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <stropts.h>
])
AC_CHECK_DECL([I_PUSH], [
AC_DEFINE(
[HAVE_STROPTS_H], [1],
[Define to 1 if you have the <stropts.h> header file.]
)], [], [
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include <stropts.h>
])

Hopefully, I got my brackets right. Otherwise, put them when they are needed. m4 has some weird syntax and the way I put my blank lines may also be not supported.


# bluetooth/bluetooth.h has been known to not compile with -std=c99.
# http://permalink.gmane.org/gmane.linux.bluez.kernel/22294
SAVE_CFLAGS=$CFLAGS
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