Add --disable-epoll.

Author: nascheme

Tools/configure/conf_platform.py

@@ -12,6 +12,10 @@
 
 import pyconf
 
+DISABLE_EPOLL = pyconf.arg_enable(
+    "epoll", help="disable epoll (default is yes if supported)"
+)
+
 
 def setup_machdep(v):
     """Detect MACHDEP from uname or cross-compile host triplet."""
@@ -830,10 +834,14 @@ def check_special_functions(v):
     pyconf.check_func("fchdir", headers=["unistd.h"])
     pyconf.check_func("fsync", headers=["unistd.h"])
     pyconf.check_func("fdatasync", headers=["unistd.h"])
-    pyconf.check_func(
-        "epoll_create", headers=["sys/epoll.h"], define="HAVE_EPOLL"
-    )
-    pyconf.check_func("epoll_create1", headers=["sys/epoll.h"])
+    disable_epoll = DISABLE_EPOLL.is_no()
+    pyconf.checking("for --disable-epoll")
+    pyconf.result("yes" if disable_epoll else "no")
+    if not disable_epoll:
+        pyconf.check_func(
+            "epoll_create", headers=["sys/epoll.h"], define="HAVE_EPOLL"
+        )
+        pyconf.check_func("epoll_create1", headers=["sys/epoll.h"])
     pyconf.check_func("kqueue", headers=["sys/types.h", "sys/event.h"])
     pyconf.check_func("prlimit", headers=["sys/time.h", "sys/resource.h"])
     pyconf.check_func(

Tools/configure/configure.awk

@@ -2588,6 +2588,7 @@ function _pyconf_register_options() {
 	pyconf_arg_enable("bolt", "", "enable usage of the llvm-bolt post-link optimizer (default is no)", "", "", "no")
 	pyconf_arg_with("platlibdir", "", "Python library directory name (default is \"lib\")", "", "", "")
 	pyconf_arg_with("wheel_pkg_dir", "", "Directory of wheel packages used by ensurepip (default: none)", "", "", "")
+	pyconf_arg_enable("epoll", "", "disable epoll (default is yes if supported)", "", "", "")
 	pyconf_arg_with("c_locale_coercion", "yes", "enable C locale coercion to a UTF-8 based locale (default is yes)", "", "", "")
 	pyconf_arg_with("openssl", "", "root of the OpenSSL directory", "DIR", "", "")
 	pyconf_arg_with("openssl_rpath", "", "Set runtime library directory (rpath) for OpenSSL libraries, no (default): don't set rpath, auto: auto-detect from --with-openssl and pkg-config, DIR: set an explicit rpath", "DIR|auto|no", "", "")
@@ -6784,7 +6785,7 @@ function u_check_posix_functions(    ANDROID_API_LEVEL, _i_name, blocked_len, ma
 	}
 }
 
-function u_check_special_functions(    _pyconf_cond_sys_eventfd_h, _pyconf_cond_sys_memfd_h, _pyconf_cond_sys_mman_h, _pyconf_cond_sys_timerfd_h, ac_cv_have_chflags, ac_cv_have_lchflags) {
+function u_check_special_functions(    _pyconf_cond_sys_eventfd_h, _pyconf_cond_sys_memfd_h, _pyconf_cond_sys_mman_h, _pyconf_cond_sys_timerfd_h, ac_cv_have_chflags, ac_cv_have_lchflags, disable_epoll) {
 	pyconf_checking("whether dirfd is declared")
 	if (pyconf_check_decl("dirfd", "sys/types.h dirent.h", "HAVE_DIRFD")) {
 		pyconf_result("yes")
@@ -6797,8 +6798,13 @@ function u_check_special_functions(    _pyconf_cond_sys_eventfd_h, _pyconf_cond_
 	pyconf_check_func("fchdir", "unistd.h", "HAVE_FCHDIR")
 	pyconf_check_func("fsync", "unistd.h", "HAVE_FSYNC")
 	pyconf_check_func("fdatasync", "unistd.h", "HAVE_FDATASYNC")
-	pyconf_check_func("epoll_create", "sys/epoll.h", "HAVE_EPOLL")
-	pyconf_check_func("epoll_create1", "sys/epoll.h", "HAVE_EPOLL_CREATE1")
+	disable_epoll = (pyconf_option_is_no("enable_epoll") ? "yes" : "no")
+	pyconf_checking("for --disable-epoll")
+	pyconf_result((((disable_epoll != "") && (disable_epoll != "no")) ? "yes" : "no"))
+	if ((!((disable_epoll != "") && (disable_epoll != "no")))) {
+		pyconf_check_func("epoll_create", "sys/epoll.h", "HAVE_EPOLL")
+		pyconf_check_func("epoll_create1", "sys/epoll.h", "HAVE_EPOLL_CREATE1")
+	}
 	pyconf_check_func("kqueue", "sys/types.h sys/event.h", "HAVE_KQUEUE")
 	pyconf_check_func("prlimit", "sys/time.h sys/resource.h", "HAVE_PRLIMIT")
 	pyconf_check_func("_dyld_shared_cache_contains_path", "mach-o/dyld.h", "HAVE_DYLD_SHARED_CACHE_CONTAINS_PATH")