Fix build configuration

raster/r.univar/benchmark/benchmark_r_univar.py

@@ -0,0 +1,59 @@
+"""Benchmarking of r.univar
+
+@author Aaron Saw Min Sern
+"""
+
+from grass.pygrass.modules import Module
+from subprocess import DEVNULL
+import os
+
+ITERATION = 5
+UP_TO_THREADS = 12
+
+
+def benchmark(module):
+    term_size = os.get_terminal_size()
+    print(module.get_bash())
+
+    min_ave = float("inf")
+    min_t = 1
+    for t in range(1, UP_TO_THREADS + 1):
+        print("\u2500" * term_size.columns)
+        print(f"Benchmark with {t} thread(s)...\n")
+        sum = 0
+        for _ in range(ITERATION):
+            module(nprocs=t).run()
+            print(f"{module.time}s")
+            sum += module.time
+
+        ave = sum / ITERATION
+        if t == 1:
+            serial_ave = ave
+        if ave < min_ave:
+            min_ave = ave
+            min_t = t
+        print(f"\nResult - {ave}s")
+
+    print("\u2500" * term_size.columns)
+    print(f"\nSerial average time - {serial_ave}s")
+    print(f"Best average time - {min_ave}s ({min_t} threads)\n")
+
+
+def main():
+    multiple_maps_parallel = Module(
+        "r.univar", map=["elevation"] * 10, flags="g", stdout_=DEVNULL
+    )
+    multiple_maps_with_zone_parallel = Module(
+        "r.univar",
+        map=["elevation"] * 10,
+        zones="basin_50K",
+        flags="g",
+        stdout_=DEVNULL,
+    )
+
+    benchmark(multiple_maps_parallel)
+    benchmark(multiple_maps_with_zone_parallel)
+
+
+if __name__ == "__main__":
+    main()

raster/r.univar/r.univar_main.c

@@ -422,6 +422,7 @@ process_raster(univar_stat * stats, int fd, int fdz, const struct Cell_head *reg
 
 }
 
+#if defined(_OPENMP)
 static void
 process_raster_threaded(univar_stat * stats, char *fname, char *zone_fname, const struct Cell_head *region, const int threads)
 {
@@ -626,3 +627,4 @@ process_raster_threaded(univar_stat * stats, char *fname, char *zone_fname, cons
     if (n_zones)
         G_free(zoneraster_row);
 }
+#endif