From a2c19cd005a1130ba7f921e0264287cfbfa8513c Mon Sep 17 00:00:00 2001
From: Sanjam Panda <36253777+saitama951@users.noreply.github.com>
Date: Thu, 6 Jul 2023 22:51:28 +0530
Subject: [PATCH] [mono] Add cmake check for HAVE_CLOCK_GETTIME (#88428)

Fixes an issue with missing method names when perf is used together with BenchmarkDotNet using Mono on Linux due to incorrect event order of the fork events and the mmap2 events.
---
 src/mono/cmake/config.h.in     | 3 +++
 src/mono/cmake/configure.cmake | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/src/mono/cmake/config.h.in b/src/mono/cmake/config.h.in
index d9ed866..6a12eb5 100644
--- a/src/mono/cmake/config.h.in
+++ b/src/mono/cmake/config.h.in
@@ -957,6 +957,9 @@
 /* Enable WebCIL image loader */
 #cmakedefine ENABLE_WEBCIL 1
 
+/* define if clockgettime exists */
+#cmakedefine HAVE_CLOCK_GETTIME 1
+
 #if defined(ENABLE_LLVM) && defined(HOST_WIN32) && defined(TARGET_WIN32) && (!defined(TARGET_AMD64) || !defined(_MSC_VER))
 #error LLVM for host=Windows and target=Windows is only supported on x64 MSVC build.
 #endif
diff --git a/src/mono/cmake/configure.cmake b/src/mono/cmake/configure.cmake
index d85e488..fb9df16 100644
--- a/src/mono/cmake/configure.cmake
+++ b/src/mono/cmake/configure.cmake
@@ -115,6 +115,8 @@ ac_check_funcs(
   pthread_attr_setstacksize pthread_get_stackaddr_np
 )
 
+check_function_exists(clock_gettime HAVE_CLOCK_GETTIME)
+
 check_symbol_exists(madvise "sys/mman.h" HAVE_MADVISE)
 check_symbol_exists(pthread_mutexattr_setprotocol "pthread.h" HAVE_DECL_PTHREAD_MUTEXATTR_SETPROTOCOL)
 check_symbol_exists(CLOCK_MONOTONIC "time.h" HAVE_CLOCK_MONOTONIC)
-- 
2.7.4