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libstdc++: Fix autoconf check for O_NONBLOCK in <fcntl.h> 

I misused the AC_CHECK_DECL macro, assuming that it behaved like
AC_CHECK_DECLS and always defined a HAVE_xxx macro if the decl was
found. Instead, the [action-if-found] shell commands are needed to
defined HAVE_O_NONBLOCK explicitly.

libstdc++-v3/ChangeLog:

	* configure.ac: Fix check for O_NONBLOCK.
	* config.h.in: Regenerate.
	* configure: Regenerate.

(cherry picked from commit b68561dd79)
This commit is contained in:
Jonathan Wakely 2024-08-28 12:38:18 +01:00
parent b91eff42ec
commit fe7940dcea
3 changed files with 9 additions and 1 deletions
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3
libstdc++-v3/config.h.in
View File

@ -295,6 +295,9 @@
/* Define if openat is available in <fcntl.h>. */
#undef HAVE_OPENAT
/* Define if O_NONBLOCK is defined in <fcntl.h> */
#undef HAVE_O_NONBLOCK
/* Define if poll is available in <poll.h>. */
#undef HAVE_POLL

2
libstdc++-v3/configure vendored
View File

@ -71665,6 +71665,8 @@ if test "$ac_cv_have_decl_F_GETFL$ac_cv_have_decl_F_SETFL" = yesyes ; then
"
if test "x$ac_cv_have_decl_O_NONBLOCK" = xyes; then :
$as_echo "#define HAVE_O_NONBLOCK 1" >>confdefs.h
fi
fi

5
libstdc++-v3/configure.ac
View File

@ -530,7 +530,10 @@ AC_CHECK_HEADERS([fcntl.h sys/ioctl.h sys/socket.h sys/uio.h poll.h netdb.h arpa
AC_CHECK_DECL(F_GETFL,,,[#include <fcntl.h>])
AC_CHECK_DECL(F_SETFL,,,[#include <fcntl.h>])
if test "$ac_cv_have_decl_F_GETFL$ac_cv_have_decl_F_SETFL" = yesyes ; then
AC_CHECK_DECL(O_NONBLOCK,,,[#include <fcntl.h>])
AC_CHECK_DECL(O_NONBLOCK,
AC_DEFINE(HAVE_O_NONBLOCK,1,[Define if O_NONBLOCK is defined in <fcntl.h>]),
[],
[#include <fcntl.h>])
fi
# For Transactional Memory TS