Issue #22181: The availability of the getrandom() is now checked in configure,
and stored in pyconfig.h as the new HAVE_GETRANDOM_SYSCALL define.
Fix os.urandom() tests using file descriptors if os.urandom() uses getrandom().
diff --git a/configure.ac b/configure.ac
index c9bb90b..a6eaadc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4972,6 +4972,30 @@
[Define to 1 if the dirent structure has a d_type field])
fi
+# check if the Linux getrandom() syscall is available
+AC_MSG_CHECKING(for the Linux getrandom() syscall)
+AC_LINK_IFELSE(
+[
+ AC_LANG_SOURCE([[
+ #include <sys/syscall.h>
+
+ int main() {
+ const int flags = 0;
+ char buffer[1];
+ int n;
+ /* ignore the result, Python checks for ENOSYS at runtime */
+ (void)syscall(SYS_getrandom, buffer, sizeof(buffer), flags);
+ return 0;
+ }
+ ]])
+],[have_getrandom_syscall=yes],[have_getrandom_syscall=no])
+AC_MSG_RESULT($have_getrandom_syscall)
+
+if test "$have_getrandom_syscall" = yes; then
+ AC_DEFINE(HAVE_GETRANDOM_SYSCALL, 1,
+ [Define to 1 if the Linux getrandom() syscall is available])
+fi
+
# generate output files
AC_CONFIG_FILES(Makefile.pre Modules/Setup.config Misc/python.pc Misc/python-config.sh)
AC_CONFIG_FILES([Modules/ld_so_aix], [chmod +x Modules/ld_so_aix])