clither build on macos

diff.diff

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ed9bc5..ce7842f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@ project ("clither"
 ###############################################################################

 include (CMakeDependentOption)
-option (CLITHER_BENCHMARKS "Compile benchmarks (requires C++)" ON)
+option (CLITHER_BENCHMARKS "Compile benchmarks (requires C++)" OFF)
 option (CLITHER_DOC "Compile LaTeX documents" ON)
 option (CLITHER_GFX "Set to OFF if you only want to build a server (headless) application.")
 cmake_dependent_option (CLITHER_GFX_SDL "Enable SDL graphics backend" ON "CLITHER_GFX" OFF)
diff --git a/src/thread_pthread.c b/src/thread_pthread.c
index 7aad8b4..834fece 100644
--- a/src/thread_pthread.c
+++ b/src/thread_pthread.c
@@ -44,9 +44,17 @@ thread_join(struct thread t, int timeout_ms)
     }
     ts.tv_sec += off.tv_sec;

+#ifdef __APPLE__
+    // On macOS, use a simple pthread_join without timeout.
+    if (pthread_join((pthread_t)t.handle, &ret) == 0)
+        return 0;
+    return -1;
+#else
+    // On Linux, use pthread_timedjoin_np if available.
     if (pthread_timedjoin_np((pthread_t)t.handle, &ret, &ts) == 0)
         return 0;
     return -1;
+#endif
 }

 /* ------------------------------------------------------------------------- */
diff --git a/src/tick_posix.c b/src/tick_posix.c
index 589ded5..da97a4b 100644
--- a/src/tick_posix.c
+++ b/src/tick_posix.c
@@ -26,7 +26,7 @@ tick_advance(struct tick* t)
     if (now > wait_until)
     {
         int ticks_behind = (now - wait_until) / t->interval;
-        if (ticks_behind >  0)
+        if (ticks_behind > 0)
             t->last = wait_until;
         return ticks_behind;
     }
@@ -51,12 +51,28 @@ tick_wait(struct tick* t)
         return (now - wait_until) / t->interval;
     }

-    /* Context switch on linux takes about ~1us */
+    /* Context switch on Linux takes about ~1us */
     if (wait_until - now > 2000)
     {
         ts.tv_sec = wait_until / 1e9;
         ts.tv_nsec = wait_until - ts.tv_sec * 1e9;
+
+#ifdef __APPLE__
+        // Use nanosleep with a calculated relative time.
+        struct timespec rel_ts;
+        clock_gettime(CLOCK_REALTIME, &rel_ts);
+        rel_ts.tv_sec = ts.tv_sec - rel_ts.tv_sec;
+        rel_ts.tv_nsec = ts.tv_nsec - rel_ts.tv_nsec;
+        if (rel_ts.tv_nsec < 0)
+        {
+            rel_ts.tv_nsec += 1e9;
+            rel_ts.tv_sec -= 1;
+        }
+        if (nanosleep(&rel_ts, NULL) == 0)
+#else
+        // Use clock_nanosleep with TIMER_ABSTIME if available.
         if (clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts, NULL) == 0)
+#endif
         {
             t->last = wait_until;
             return 0;
@@ -95,12 +111,26 @@ tick_wait_warp(struct tick* t, int warp, int tps)
         return (now - wait_until) / t->interval;
     }

-    /* Context switch on linux takes about ~1us */
+    /* Context switch on Linux takes about ~1us */
     if (wait_until - now > 2000)
     {
         ts.tv_sec = wait_until / 1e9;
         ts.tv_nsec = wait_until - ts.tv_sec * 1e9;
+
+#ifdef __APPLE__
+        struct timespec rel_ts;
+        clock_gettime(CLOCK_REALTIME, &rel_ts);
+        rel_ts.tv_sec = ts.tv_sec - rel_ts.tv_sec;
+        rel_ts.tv_nsec = ts.tv_nsec - rel_ts.tv_nsec;
+        if (rel_ts.tv_nsec < 0)
+        {
+            rel_ts.tv_nsec += 1e9;
+            rel_ts.tv_sec -= 1;
+        }
+        if (nanosleep(&rel_ts, NULL) == 0)
+#else
         if (clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts, NULL) == 0)
+#endif
         {
             t->last = wait_until;
             return 0;

ref: TheComet/clither#1