From 52e27fe9c6421d36337c0b69df6ca2b3b2d72613 Mon Sep 17 00:00:00 2001
From: Sergei Nikulov <sergey.nikulov@gmail.com>
Date: Fri, 11 Jan 2019 12:05:17 +0300
Subject: cmake: added checks for HAVE_VARIADIC_MACROS_C99 and
 HAVE_VARIADIC_MACROS_GCC

---
 CMake/CurlTests.c | 46 ++++++++++++++++++++++++++++++++++++++++++++--
 CMakeLists.txt    |  2 ++
 2 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/CMake/CurlTests.c b/CMake/CurlTests.c
index 9388c835b..0756b2a31 100644
--- a/CMake/CurlTests.c
+++ b/CMake/CurlTests.c
@@ -553,8 +553,8 @@ main() {
 #include <time.h>
 int
 main() {
-  struct timespec ts = {0, 0}; 
-  clock_gettime(CLOCK_MONOTONIC, &ts); 
+  struct timespec ts = {0, 0};
+  clock_gettime(CLOCK_MONOTONIC, &ts);
   return 0;
 }
 #endif
@@ -565,3 +565,45 @@ main() {
   return 0;
 }
 #endif
+#ifdef HAVE_VARIADIC_MACROS_C99
+#define c99_vmacro3(first, ...) fun3(first, __VA_ARGS__)
+#define c99_vmacro2(first, ...) fun2(first, __VA_ARGS__)
+
+int fun3(int arg1, int arg2, int arg3);
+int fun2(int arg1, int arg2);
+
+int fun3(int arg1, int arg2, int arg3) {
+  return arg1 + arg2 + arg3;
+}
+int fun2(int arg1, int arg2) {
+  return arg1 + arg2;
+}
+
+int
+main() {
+  int res3 = c99_vmacro3(1, 2, 3);
+  int res2 = c99_vmacro2(1, 2);
+  return 0;
+}
+#endif
+#ifdef HAVE_VARIADIC_MACROS_GCC
+#define gcc_vmacro3(first, args...) fun3(first, args)
+#define gcc_vmacro2(first, args...) fun2(first, args)
+
+int fun3(int arg1, int arg2, int arg3);
+int fun2(int arg1, int arg2);
+
+int fun3(int arg1, int arg2, int arg3) {
+  return arg1 + arg2 + arg3;
+}
+int fun2(int arg1, int arg2) {
+  return arg1 + arg2;
+}
+
+int
+main() {
+  int res3 = gcc_vmacro3(1, 2, 3);
+  int res2 = gcc_vmacro2(1, 2);
+  return 0;
+}
+#endif
diff --git a/CMakeLists.txt b/CMakeLists.txt
index db443de31..bdd2a2980 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -972,6 +972,8 @@ foreach(CURL_TEST
     HAVE_INET_NTOA_R_DECL_REENTRANT
     HAVE_GETADDRINFO
     HAVE_FILE_OFFSET_BITS
+    HAVE_VARIADIC_MACROS_C99
+    HAVE_VARIADIC_MACROS_GCC
     )
   curl_internal_test(${CURL_TEST})
 endforeach()
-- 
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