From 99c2e7e5542380bcf416fdbcf4f895c158f5cede Mon Sep 17 00:00:00 2001
From: Sergei Nikulov <sergey.nikulov@gmail.com>
Date: Tue, 15 Jan 2019 12:50:18 +0300
Subject: [PATCH] cmake: updated check for HAVE_POLL_FINE to match autotools

---
 CMake/OtherTests.cmake | 42 +++++++++++++++++++++++++++++++++++-------
 CMakeLists.txt         |  9 ++-------
 docs/KNOWN_BUGS        |  3 ---
 3 files changed, 37 insertions(+), 17 deletions(-)

diff --git a/CMake/OtherTests.cmake b/CMake/OtherTests.cmake
index ce6d3e13a..c180a5888 100644
--- a/CMake/OtherTests.cmake
+++ b/CMake/OtherTests.cmake
@@ -177,20 +177,48 @@ int main(void) {
   return 0;
 }" HAVE_STRUCT_TIMEVAL)
 
-
-include(CheckCSourceRuns)
-# See HAVE_POLL in CMakeLists.txt for why poll is disabled on macOS
-if(NOT APPLE)
-  set(CMAKE_REQUIRED_FLAGS)
+if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
+  # if not cross-compilation...
+  include(CheckCSourceRuns)
+  set(CMAKE_REQUIRED_FLAGS "")
   if(HAVE_SYS_POLL_H)
     set(CMAKE_REQUIRED_FLAGS "-DHAVE_SYS_POLL_H")
+  elseif(HAVE_POLL_H)
+    set(CMAKE_REQUIRED_FLAGS "-DHAVE_POLL_H")
   endif()
   check_c_source_runs("
+    #include <stdlib.h>
+    #include <sys/time.h>
+
     #ifdef HAVE_SYS_POLL_H
     #  include <sys/poll.h>
+    #elif  HAVE_POLL_H
+    #  include <poll.h>
     #endif
-    int main(void) {
-      return poll((void *)0, 0, 10 /*ms*/);
+
+    int main(void)
+    {
+        if(0 != poll(0, 0, 10)) {
+          return 1; /* fail */
+        }
+        else {
+          /* detect the 10.12 poll() breakage */
+          struct timeval before, after;
+          int rc;
+          size_t us;
+
+          gettimeofday(&before, NULL);
+          rc = poll(NULL, 0, 500);
+          gettimeofday(&after, NULL);
+
+          us = (after.tv_sec - before.tv_sec) * 1000000 +
+            (after.tv_usec - before.tv_usec);
+
+          if(us < 400000) {
+            return 1;
+          }
+        }
+        return 0;
     }" HAVE_POLL_FINE)
 endif()
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index bdd2a2980..edb1cec21 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@
 #                            | (__| |_| |  _ <| |___
 #                             \___|\___/|_| \_\_____|
 #
-# Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
 #
 # This software is licensed as described in the file COPYING, which
 # you should have received as part of this distribution. The terms
@@ -70,7 +70,6 @@ message(STATUS "curl version=[${CURL_VERSION}]")
 set(OPERATING_SYSTEM "${CMAKE_SYSTEM_NAME}")
 set(OS "\"${CMAKE_SYSTEM_NAME}\"")
 
-include_directories(${PROJECT_BINARY_DIR}/include/curl)
 include_directories(${CURL_SOURCE_DIR}/include)
 
 option(CURL_WERROR "Turn compiler warnings into errors" OFF)
@@ -828,12 +827,8 @@ endif()
 
 check_symbol_exists(basename      "${CURL_INCLUDES}" HAVE_BASENAME)
 check_symbol_exists(socket        "${CURL_INCLUDES}" HAVE_SOCKET)
-# poll on macOS is unreliable, it first did not exist, then was broken until
-# fixed in 10.9 only to break again in 10.12.
-if(NOT APPLE)
-  check_symbol_exists(poll        "${CURL_INCLUDES}" HAVE_POLL)
-endif()
 check_symbol_exists(select        "${CURL_INCLUDES}" HAVE_SELECT)
+check_symbol_exists(poll          "${CURL_INCLUDES}" HAVE_POLL)
 check_symbol_exists(strdup        "${CURL_INCLUDES}" HAVE_STRDUP)
 check_symbol_exists(strstr        "${CURL_INCLUDES}" HAVE_STRSTR)
 check_symbol_exists(strtok_r      "${CURL_INCLUDES}" HAVE_STRTOK_R)
diff --git a/docs/KNOWN_BUGS b/docs/KNOWN_BUGS
index b397149d5..43e008dee 100644
--- a/docs/KNOWN_BUGS
+++ b/docs/KNOWN_BUGS
@@ -384,9 +384,6 @@ problems may have been fixed or changed somewhat since this was written!
 
   - no nghttp2 check
 
-  - no check for what variadic macros that are supported. See
-    https://github.com/curl/curl/pull/3452
-
   - unusable tool_hugehelp.c with MinGW, see
     https://github.com/curl/curl/issues/3125