diff --git a/libomptarget/CMakeLists.txt b/libomptarget/CMakeLists.txt
index 3d9c78a72..ad0afb47d 100644
--- a/libomptarget/CMakeLists.txt
+++ b/libomptarget/CMakeLists.txt
@@ -53,6 +53,13 @@ if(LIBOMPTARGET_CMAKE_BUILD_TYPE MATCHES debug)
   add_definitions(-O0)
 endif()
 
+set(LIBOMPTARGET_FLANG_API FALSE CACHE BOOL
+        "Build API for Flang.")
+if(${LIBOMPTARGET_FLANG_API})
+  add_definitions(-DFLANG_API)
+  libomptarget_say("Building OpenMP API for FLANG.")
+endif()
+
 include_directories(include)
 
 # Build target agnostic offloading library.
diff --git a/libomptarget/deviceRTLs/nvptx/src/interface.h b/libomptarget/deviceRTLs/nvptx/src/interface.h
index 680df48d4..b23bf7053 100644
--- a/libomptarget/deviceRTLs/nvptx/src/interface.h
+++ b/libomptarget/deviceRTLs/nvptx/src/interface.h
@@ -88,6 +88,36 @@ EXTERN int omp_is_initial_device(void);
 EXTERN int omp_get_initial_device(void);
 EXTERN int omp_get_max_task_priority(void);
 
+
+#ifdef FLANG_API
+EXTERN double omp_get_wtick_(void);
+EXTERN double omp_get_wtime_(void);
+EXTERN int omp_get_num_threads_(void);
+EXTERN int omp_get_max_threads_(void);
+EXTERN int omp_get_thread_limit_(void);
+EXTERN int omp_get_thread_num_(void);
+EXTERN int omp_get_num_procs_(void);
+EXTERN int omp_in_parallel_(void);
+EXTERN int omp_in_final_(void);
+EXTERN int omp_get_nested_(void);
+EXTERN int omp_get_max_active_levels_(void);
+EXTERN int omp_get_level_(void);
+EXTERN int omp_get_active_level_(void);
+EXTERN int omp_get_ancestor_thread_num_(int level);
+EXTERN int omp_get_team_size_(int level);
+EXTERN int omp_get_default_device_(void);
+EXTERN int omp_get_num_devices_(void);
+EXTERN int omp_get_num_teams_(void);
+EXTERN int omp_get_team_num_(void);
+EXTERN void omp_get_schedule_(omp_sched_t *kind, int *modifier);
+EXTERN int omp_get_initial_device_(void);
+EXTERN int omp_get_max_task_priority_(void);
+EXTERN int omp_get_cancellation_(void);
+EXTERN int omp_get_dynamic_(void);
+EXTERN void omp_lib_osnt4_(int num);
+EXTERN void omp_lib_osmal4_(int level);
+#endif
+
 ////////////////////////////////////////////////////////////////////////////////
 // OMPTARGET_NVPTX private (debug / temportary?) interface
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/libomptarget/deviceRTLs/nvptx/src/libcall.cu b/libomptarget/deviceRTLs/nvptx/src/libcall.cu
index 15040dbaf..aedfed242 100644
--- a/libomptarget/deviceRTLs/nvptx/src/libcall.cu
+++ b/libomptarget/deviceRTLs/nvptx/src/libcall.cu
@@ -460,3 +460,67 @@ EXTERN void xlf_debug_print_double(double *p) {
 EXTERN void xlf_debug_print_addr(void *p) {
   printf("xlf DEBUG %d): %p \n", omp_get_team_num(), p);
 }
+
+
+#ifdef FLANG_API
+EXTERN double omp_get_wtick_(void) { return omp_get_wtick(); }
+
+EXTERN double omp_get_wtime_(void) { return omp_get_wtime(); }
+
+EXTERN int omp_get_num_threads_(void) { return omp_get_num_threads(); }
+
+EXTERN int omp_get_max_threads_(void) { return omp_get_max_threads(); }
+
+EXTERN int omp_get_thread_limit_(void) { return omp_get_thread_limit(); }
+
+EXTERN int omp_get_thread_num_(void) { return omp_get_thread_num(); }
+
+EXTERN int omp_get_num_procs_(void) { return omp_get_num_procs(); }
+
+EXTERN int omp_in_parallel_(void) { return omp_in_parallel(); }
+
+EXTERN int omp_in_final_(void) { return omp_in_final(); }
+
+EXTERN int omp_get_nested_(void) { return omp_get_nested(); }
+
+EXTERN int omp_get_max_active_levels_(void) {
+  return omp_get_max_active_levels();
+}
+
+EXTERN int omp_get_level_(void) { return omp_get_level(); }
+
+EXTERN int omp_get_active_level_(void) { return omp_get_active_level(); }
+
+EXTERN int omp_get_ancestor_thread_num_(int* level) {
+  return omp_get_ancestor_thread_num(*level);
+}
+
+EXTERN int omp_get_team_size_(int* level) { return omp_get_team_size(*level); }
+
+EXTERN int omp_get_default_device_(void) { return omp_get_default_device(); }
+
+EXTERN int omp_get_num_devices_(void) { return omp_get_num_devices(); }
+
+EXTERN int omp_get_num_teams_(void) { return omp_get_num_teams(); }
+
+EXTERN int omp_get_team_num_(void) { return omp_get_team_num(); }
+
+EXTERN void omp_get_schedule_(omp_sched_t *kind, int *modifier) {
+  return omp_get_schedule(kind, modifier);
+}
+
+EXTERN int omp_get_initial_device_(void) { return omp_get_initial_device(); }
+
+EXTERN int omp_get_max_task_priority_(void) {
+  return omp_get_max_task_priority();
+}
+
+EXTERN int omp_get_cancellation_(void) { return omp_get_cancellation(); }
+
+EXTERN int omp_get_dynamic_(void) { return omp_get_dynamic(); }
+
+EXTERN void omp_lib_osnt4_(int* num) { omp_set_num_threads(*num); }
+
+EXTERN void omp_lib_osmal4_(int* level) { omp_set_max_active_levels(*level); }
+#endif
+