Linux/BSD: Fix support for NetBSD

Add __NetBSD__ to `platform_config.h` so that it can find `alloca`
and use the proper `pthread_setname_np` format.

Rename RANDOM_MAX to avoid conflict with NetBSD stdlib.

Fixes #42145.

(cherry picked from commit 5f4d64f4f3ca633a147eda995ab6613a446a4f0e)

core/math/math_funcs.h

@@ -47,7 +47,8 @@ class Math {
 public:
 	Math() {} // useless to instance
 
-	static const uint64_t RANDOM_MAX = 0xFFFFFFFF;
+	// Not using 'RANDOM_MAX' to avoid conflict with system headers on some OSes (at least NetBSD).
+	static const uint64_t RANDOM_32BIT_MAX = 0xFFFFFFFF;
 
 	static _ALWAYS_INLINE_ double sin(double p_x) { return ::sin(p_x); }
 	static _ALWAYS_INLINE_ float sin(float p_x) { return ::sinf(p_x); }
@@ -280,8 +281,8 @@ public:
 	static void randomize();
 	static uint32_t rand_from_seed(uint64_t *seed);
 	static uint32_t rand();
-	static _ALWAYS_INLINE_ double randd() { return (double)rand() / (double)Math::RANDOM_MAX; }
-	static _ALWAYS_INLINE_ float randf() { return (float)rand() / (float)Math::RANDOM_MAX; }
+	static _ALWAYS_INLINE_ double randd() { return (double)rand() / (double)Math::RANDOM_32BIT_MAX; }
+	static _ALWAYS_INLINE_ float randf() { return (float)rand() / (float)Math::RANDOM_32BIT_MAX; }
 
 	static double random(double from, double to);
 	static float random(float from, float to);

core/math/random_pcg.h

@@ -67,7 +67,6 @@ class RandomPCG {
 public:
 	static const uint64_t DEFAULT_SEED = 12047754176567800795U;
 	static const uint64_t DEFAULT_INC = PCG_DEFAULT_INC_64;
-	static const uint64_t RANDOM_MAX = 0xFFFFFFFF;
 
 	RandomPCG(uint64_t p_seed = DEFAULT_SEED, uint64_t p_inc = DEFAULT_INC);
 

drivers/unix/thread_posix.cpp

@@ -29,17 +29,17 @@
 /*************************************************************************/
 
 #include "thread_posix.h"
-#include "core/script_language.h"
 
 #if (defined(UNIX_ENABLED) || defined(PTHREAD_ENABLED)) && !defined(NO_THREADS)
 
+#include "core/os/memory.h"
+#include "core/safe_refcount.h"
+#include "core/script_language.h"
+
 #ifdef PTHREAD_BSD_SET_NAME
 #include <pthread_np.h>
 #endif
 
-#include "core/os/memory.h"
-#include "core/safe_refcount.h"
-
 static void _thread_id_key_destr_callback(void *p_value) {
 	memdelete(static_cast<Thread::ID *>(p_value));
 }
@@ -130,6 +130,8 @@ Error ThreadPosix::set_name_func_posix(const String &p_name) {
 #ifdef PTHREAD_BSD_SET_NAME
 	pthread_set_name_np(running_thread, p_name.utf8().get_data());
 	int err = 0; // Open/FreeBSD ignore errors in this function
+#elif defined(PTHREAD_NETBSD_SET_NAME)
+	int err = pthread_setname_np(running_thread, "%s", const_cast<char *>(p_name.utf8().get_data()));
 #else
 	int err = pthread_setname_np(running_thread, p_name.utf8().get_data());
 #endif // PTHREAD_BSD_SET_NAME

platform/server/platform_config.h

@@ -31,10 +31,19 @@
 #if defined(__linux__) || defined(__APPLE__)
 #include <alloca.h>
 #endif
-#if defined(__FreeBSD__) || defined(__OpenBSD__)
-#include <stdlib.h>
+
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+#include <stdlib.h> // alloca
+// FreeBSD and OpenBSD use pthread_set_name_np, while other platforms,
+// include NetBSD, use pthread_setname_np. NetBSD's version however requires
+// a different format, we handle this directly in thread_posix.
+#ifdef __NetBSD__
+#define PTHREAD_NETBSD_SET_NAME
+#else
 #define PTHREAD_BSD_SET_NAME
 #endif
+#endif
+
 #ifdef __APPLE__
 #define PTHREAD_RENAME_SELF
 #endif

platform/x11/platform_config.h

@@ -31,10 +31,18 @@
 #ifdef __linux__
 #include <alloca.h>
 #endif
-#if defined(__FreeBSD__) || defined(__OpenBSD__)
-#include <stdlib.h>
+
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+#include <stdlib.h> // alloca
+// FreeBSD and OpenBSD use pthread_set_name_np, while other platforms,
+// include NetBSD, use pthread_setname_np. NetBSD's version however requires
+// a different format, we handle this directly in thread_posix.
+#ifdef __NetBSD__
+#define PTHREAD_NETBSD_SET_NAME
+#else
 #define PTHREAD_BSD_SET_NAME
 #endif
+#endif
 
 #define GLES3_INCLUDE_H "thirdparty/glad/glad/glad.h"
 #define GLES2_INCLUDE_H "thirdparty/glad/glad/glad.h"