3 files changed, 43 insertions, 8 deletions
diff --git a/src/lib/corelib/tools/fileinfo.cpp b/src/lib/corelib/tools/fileinfo.cpp
index c4ba0e5e0..a1571b954 100644
--- a/src/lib/corelib/tools/fileinfo.cpp
+++ b/src/lib/corelib/tools/fileinfo.cpp
@@ -371,7 +371,9 @@ bool FileInfo::exists() const
 
 FileTime FileInfo::lastModified() const
 {
-#if HAS_CLOCK_GETTIME
+#if APPLE_STAT_TIMESPEC
+    return m_stat.st_mtimespec;
+#elif HAS_CLOCK_GETTIME
     return m_stat.st_mtim;
 #else
     return m_stat.st_mtime;
@@ -380,7 +382,9 @@ FileTime FileInfo::lastModified() const
 
 FileTime FileInfo::lastStatusChange() const
 {
-#if HAS_CLOCK_GETTIME
+#if APPLE_STAT_TIMESPEC
+    return m_stat.st_ctimespec;
+#elif HAS_CLOCK_GETTIME
     return m_stat.st_ctim;
 #else
     return m_stat.st_ctime;
diff --git a/src/lib/corelib/tools/filetime.cpp b/src/lib/corelib/tools/filetime.cpp
index 3f7148594..8b34ba81e 100644
--- a/src/lib/corelib/tools/filetime.cpp
+++ b/src/lib/corelib/tools/filetime.cpp
@@ -55,6 +55,20 @@ template<bool> struct CompileTimeAssert;
 template<> struct CompileTimeAssert<true> {};
 #endif
 
+#ifdef APPLE_CUSTOM_CLOCK_GETTIME
+#include <sys/time.h>
+// clk_id isn't used, only the CLOCK_REALTIME case is implemented.
+int clock_gettime(int /*clk_id*/, struct timespec *t)
+{
+    struct timeval tv;
+    // Resolution of gettimeofday is 1000nsecs = 1 microsecond.
+    int ret = gettimeofday(&tv, NULL);
+    t->tv_sec  = tv.tv_sec;
+    t->tv_nsec = tv.tv_usec * 1000;
+    return ret;
+}
+#endif
+
 FileTime::FileTime()
 {
 #ifdef Q_OS_WIN
@@ -124,6 +138,13 @@ FileTime FileTime::currentTime()
     FILETIME *const ft = reinterpret_cast<FILETIME *>(&result.m_fileTime);
     SystemTimeToFileTime(&st, ft);
     return result;
+#elif defined APPLE_CUSTOM_CLOCK_GETTIME
+    InternalType t;
+    // Explicitly use our custom version, so that we don't get an additional unresolved symbol on a
+    // system that actually provides one, but isn't used due to the minimium deployment target
+    // being lower.
+    qbs::Internal::clock_gettime(CLOCK_REALTIME, &t);
+    return t;
 #elif HAS_CLOCK_GETTIME
     InternalType t;
     clock_gettime(CLOCK_REALTIME, &t);
diff --git a/src/lib/corelib/tools/filetime.h b/src/lib/corelib/tools/filetime.h
index d68c6ac4a..73e9d4544 100644
--- a/src/lib/corelib/tools/filetime.h
+++ b/src/lib/corelib/tools/filetime.h
@@ -45,17 +45,27 @@
 #include <QtCore/qdatastream.h>
 #include <QtCore/qdebug.h>
 
-#if defined(Q_OS_UNIX)
+#if defined(Q_OS_UNIX) && !defined(__APPLE__)
 #include <time.h>
-#define BUILD_HOST_HAS_CLOCK_GETTIME (_POSIX_C_SOURCE >= 199309L)
+#define HAS_CLOCK_GETTIME (_POSIX_C_SOURCE >= 199309L)
+#endif // Q_OS_UNIX
+
 #ifdef __APPLE__
+
 #if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101200
-#define HAS_CLOCK_GETTIME BUILD_HOST_HAS_CLOCK_GETTIME
+// macOS 10.12+ ships clock_gettime.
+#else
+// We implement our own clock_gettime.
+#define APPLE_CUSTOM_CLOCK_GETTIME 1
 #endif // __MAC_OS_X_VERSION_MIN_REQUIRED
-#else // __APPLE__
-#define HAS_CLOCK_GETTIME BUILD_HOST_HAS_CLOCK_GETTIME
+
+// Either way we have a clock_gettime in the end.
+#define HAS_CLOCK_GETTIME 1
+
+// Apple stat struct has slightly different names for time fields.
+#define APPLE_STAT_TIMESPEC 1
+
 #endif // __APPLE__
-#endif // Q_OS_UNIX
 
 namespace qbs {
 namespace Internal {