From 667b5721c71480b4e5dbd2f91d7668a2b92bf00b Mon Sep 17 00:00:00 2001
From: dmitrykos <dmitrykos@neutroncode.com>
Date: Thu, 4 Oct 2018 21:31:23 +0300
Subject: cmake: test and set missed defines during configuration

Added configuration checks for HAVE_BUILTIN_AVAILABLE and HAVE_CLOCK_GETTIME_MONOTONIC.

Closes #3097
---
 CMake/CurlTests.c       | 16 ++++++++++++++++
 CMakeLists.txt          |  6 ++++++
 lib/curl_config.h.cmake |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/CMake/CurlTests.c b/CMake/CurlTests.c
index ab244ac39..9388c835b 100644
--- a/CMake/CurlTests.c
+++ b/CMake/CurlTests.c
@@ -549,3 +549,19 @@ main() {
   return 0;
 }
 #endif
+#ifdef HAVE_CLOCK_GETTIME_MONOTONIC
+#include <time.h>
+int
+main() {
+  struct timespec ts = {0, 0}; 
+  clock_gettime(CLOCK_MONOTONIC, &ts); 
+  return 0;
+}
+#endif
+#ifdef HAVE_BUILTIN_AVAILABLE
+int
+main() {
+  if(__builtin_available(macOS 10.12, *)) {}
+  return 0;
+}
+#endif
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4d7605364..8ecf34ce0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1026,6 +1026,12 @@ if(HAVE_INET_NTOA_R_DECL_REENTRANT)
   set(NEED_REENTRANT 1)
 endif()
 
+# Check clock_gettime(CLOCK_MONOTONIC, x) support
+curl_internal_test(HAVE_CLOCK_GETTIME_MONOTONIC)
+
+# Check compiler support of __builtin_available()
+curl_internal_test(HAVE_BUILTIN_AVAILABLE)
+
 # Some other minor tests
 
 if(NOT HAVE_IN_ADDR_T)
diff --git a/lib/curl_config.h.cmake b/lib/curl_config.h.cmake
index ab0094be5..83cf07ba6 100644
--- a/lib/curl_config.h.cmake
+++ b/lib/curl_config.h.cmake
@@ -127,6 +127,9 @@
 /* Define to 1 if bool is an available type. */
 #cmakedefine HAVE_BOOL_T 1
 
+/* Define to 1 if you have the __builtin_available function. */
+#cmakedefine HAVE_BUILTIN_AVAILABLE 1
+
 /* Define to 1 if you have the clock_gettime function and monotonic timer. */
 #cmakedefine HAVE_CLOCK_GETTIME_MONOTONIC 1
 
-- 
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