MDEV-15778: Manually backport TokuDB macOS fixes from 10.0

Fix build on macOS 10.13:

39dceaae MDEV-10983: TokuDB does not compile on OS X 10.12
Make use of a different function to get the current tid.
Additionally, librt doesn't exist on OS X. Use System library instead.

 storage/tokudb/PerconaFT/cmake_modules/TokuFeatureDetection.cmake | 4 +++-
 storage/tokudb/PerconaFT/portability/portability.cc               | 9 ++++++++-
 storage/tokudb/PerconaFT/portability/tests/test-xid.cc            | 9 ++++++++-
 storage/tokudb/PerconaFT/portability/toku_config.h.in             | 1 +
 4 files changed, 20 insertions(+), 3 deletions(-)

storage/tokudb/ft-index/cmake_modules/TokuFeatureDetection.cmake

@@ -96,7 +96,7 @@ if (NOT HAVE_BACKTRACE_WITHOUT_EXECINFO)
   endif ()
 endif ()
 
-if(HAVE_CLOCK_REALTIME)
+if(HAVE_CLOCK_REALTIME AND (NOT APPLE))
   list(APPEND EXTRA_SYSTEM_LIBS rt)
 else()
   list(APPEND EXTRA_SYSTEM_LIBS System)
@@ -108,6 +108,8 @@ check_function_exists(pthread_rwlockattr_setkind_np HAVE_PTHREAD_RWLOCKATTR_SETK
 ## check for the right way to yield using pthreads
 check_function_exists(pthread_yield HAVE_PTHREAD_YIELD)
 check_function_exists(pthread_yield_np HAVE_PTHREAD_YIELD_NP)
+## check if we have pthread_threadid_np() (i.e. osx)
+check_function_exists(pthread_threadid_np HAVE_PTHREAD_THREADID_NP)
 ## check if we have pthread_getthreadid_np() (i.e. freebsd)
 check_function_exists(pthread_getthreadid_np HAVE_PTHREAD_GETTHREADID_NP)
 

storage/tokudb/ft-index/portability/portability.cc

@@ -115,6 +115,9 @@ PATENT RIGHTS GRANT:
 #if defined(HAVE_SYS_SYSCTL_H)
 # include <sys/sysctl.h>
 #endif
+#if defined(HAVE_PTHREAD_H)
+# include <pthread.h>
+#endif
 #if defined(HAVE_PTHREAD_NP_H)
 # include <pthread_np.h>
 #endif
@@ -154,7 +157,11 @@ toku_os_getpid(void) {
 
 int
 toku_os_gettid(void) {
-#if defined(__NR_gettid)
+#if defined(HAVE_PTHREAD_THREADID_NP)
+    uint64_t result;
+    pthread_threadid_np(NULL, &result);
+    return (int) result; // Used for instrumentation so overflow is ok here.
+#elif defined(__NR_gettid)
     return syscall(__NR_gettid);
 #elif defined(SYS_gettid)
     return syscall(SYS_gettid);

storage/tokudb/ft-index/portability/tests/test-xid.cc

@@ -103,11 +103,18 @@ PATENT RIGHTS GRANT:
 #if defined(HAVE_PTHREAD_NP_H)
 # include <pthread_np.h>
 #endif
+#if defined(HAVE_PTHREAD_H)
+# include <pthread.h>
+#endif
 
 // since we implement the same thing here as in toku_os_gettid, this test
 // is pretty pointless
 static int gettid(void) {
-#if defined(__NR_gettid)
+#if defined(HAVE_PTHREAD_THREADID_NP)
+    uint64_t result;
+    pthread_threadid_np(NULL, &result);
+    return (int) result;
+#elif defined(__NR_gettid)
     return syscall(__NR_gettid);
 #elif defined(SYS_gettid)
     return syscall(SYS_gettid);

storage/tokudb/ft-index/portability/toku_config.h.in

@@ -57,6 +57,7 @@
 #cmakedefine HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP 1
 #cmakedefine HAVE_PTHREAD_YIELD 1
 #cmakedefine HAVE_PTHREAD_YIELD_NP 1
+#cmakedefine HAVE_PTHREAD_THREADID_NP 1
 #cmakedefine HAVE_PTHREAD_GETTHREADID_NP 1
 
 #cmakedefine PTHREAD_YIELD_RETURNS_INT 1