From abac34eda2da59e5151bd8a96bfe9e4d550bafd5 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 5 Mar 2026 16:38:20 -0500
Subject: [PATCH] libuv: Restore support for macOS 10.x

Upstream libuv no longer supports these versions.
---
 Utilities/cmlibuv/src/unix/core.c   |  4 ++++
 Utilities/cmlibuv/src/unix/darwin.c | 12 ++++++++++++
 Utilities/cmlibuv/src/unix/fs.c     | 26 ++++++++++++++++++++++----
 3 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/Utilities/cmlibuv/src/unix/core.c b/Utilities/cmlibuv/src/unix/core.c
index fc2b13b4f3..6b2e79299d 100644
--- a/Utilities/cmlibuv/src/unix/core.c
+++ b/Utilities/cmlibuv/src/unix/core.c
@@ -124,6 +124,9 @@ STATIC_ASSERT(offsetof(uv_buf_t, len) == offsetof(struct iovec, iov_len));
 
 /* https://github.com/libuv/libuv/issues/1674 */
 int uv_clock_gettime(uv_clock_id clock_id, uv_timespec64_t* ts) {
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
+  return UV_ENOSYS;
+#else
   struct timespec t;
   int r;
 
@@ -148,6 +151,7 @@ int uv_clock_gettime(uv_clock_id clock_id, uv_timespec64_t* ts) {
   ts->tv_nsec = t.tv_nsec;
 
   return 0;
+#endif
 }
 
 
diff --git a/Utilities/cmlibuv/src/unix/darwin.c b/Utilities/cmlibuv/src/unix/darwin.c
index 98ddf27287..a4e8129c39 100644
--- a/Utilities/cmlibuv/src/unix/darwin.c
+++ b/Utilities/cmlibuv/src/unix/darwin.c
@@ -32,6 +32,12 @@
 #include <sys/sysctl.h>
 #include <unistd.h>  /* sysconf */
 
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 101200
+#  include <dlfcn.h>
+#  define mach_continuous_time uv__mach_continuous_time
+   static uint64_t (*uv__mach_continuous_time)(void);
+#endif
+
 static uv_once_t once = UV_ONCE_INIT;
 static mach_timebase_info_data_t timebase;
 
@@ -54,6 +60,12 @@ void uv__platform_loop_delete(uv_loop_t* loop) {
 static void uv__hrtime_init_once(void) {
   if (KERN_SUCCESS != mach_timebase_info(&timebase))
     abort();
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 101200
+  uv__mach_continuous_time = (uint64_t (*)(void))
+    dlsym(RTLD_DEFAULT, "mach_continuous_time");
+  if (uv__mach_continuous_time == NULL)
+    uv__mach_continuous_time = mach_absolute_time;
+#endif
 }
 
 
diff --git a/Utilities/cmlibuv/src/unix/fs.c b/Utilities/cmlibuv/src/unix/fs.c
index 5f2551351f..bc31781085 100644
--- a/Utilities/cmlibuv/src/unix/fs.c
+++ b/Utilities/cmlibuv/src/unix/fs.c
@@ -203,7 +203,7 @@ static ssize_t uv__fs_fdatasync(uv_fs_t* req) {
 }
 
 
-#if defined(__APPLE__)                                                        \
+#if (defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED >= 101300)           \
     || defined(_AIX71)                                                        \
     || defined(__DragonFly__)                                                 \
     || defined(__FreeBSD__)                                                   \
@@ -234,7 +234,7 @@ static struct timespec uv__fs_to_timespec(double time) {
 
 
 static ssize_t uv__fs_futime(uv_fs_t* req) {
-#if defined(__APPLE__)                                                        \
+#if (defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED >= 101300)           \
     || defined(_AIX71)                                                        \
     || defined(__DragonFly__)                                                 \
     || defined(__FreeBSD__)                                                   \
@@ -1167,7 +1167,7 @@ static ssize_t uv__fs_sendfile(uv_fs_t* req) {
 
 
 static ssize_t uv__fs_utime(uv_fs_t* req) {
-#if defined(__APPLE__)                                                        \
+#if (defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED >= 101300)           \
     || defined(_AIX71)                                                        \
     || defined(__DragonFly__)                                                 \
     || defined(__FreeBSD__)                                                   \
@@ -1202,7 +1202,7 @@ static ssize_t uv__fs_utime(uv_fs_t* req) {
 
 
 static ssize_t uv__fs_lutime(uv_fs_t* req) {
-#if defined(__APPLE__)                                                        \
+#if (defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED >= 101300)           \
     || defined(_AIX71)                                                        \
     || defined(__DragonFly__)                                                 \
     || defined(__FreeBSD__)                                                   \
@@ -1258,7 +1258,11 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
   uv_file dstfd;
   struct stat src_statsbuf;
   struct stat dst_statsbuf;
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED < 101300
+  struct timeval times[2];
+#else
   struct timespec times[2];
+#endif
   int dst_flags;
   int result;
   int err;
@@ -1340,8 +1344,15 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
    * Change the timestamps of the destination file to match the source file.
    */
 #if defined(__APPLE__)
+#  if MAC_OS_X_VERSION_MIN_REQUIRED < 101300
+  times[0].tv_sec = src_statsbuf.st_atimespec.tv_sec;
+  times[0].tv_usec = src_statsbuf.st_atimespec.tv_nsec / 1000;
+  times[1].tv_sec = src_statsbuf.st_mtimespec.tv_sec;
+  times[1].tv_usec = src_statsbuf.st_mtimespec.tv_nsec / 1000;
+#  else
   times[0] = src_statsbuf.st_atimespec;
   times[1] = src_statsbuf.st_mtimespec;
+#  endif
 #elif defined(_AIX)
   times[0].tv_sec = src_statsbuf.st_atime;
   times[0].tv_nsec = src_statsbuf.st_atime_n;
@@ -1352,10 +1363,17 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
   times[1] = src_statsbuf.st_mtim;
 #endif
 
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED < 101300
+  if (futimes(dstfd, times) == -1) {
+    err = UV__ERR(errno);
+    goto out;
+  }
+#else
   if (futimens(dstfd, times) == -1) {
     err = UV__ERR(errno);
     goto out;
   }
+#endif
 
   /*
    * Change the ownership and permissions of the destination file to match the