diff --git a/UnixBench/Makefile b/UnixBench/Makefile
index d6868ba..1390da1 100644
--- a/UnixBench/Makefile
+++ b/UnixBench/Makefile
@@ -58,43 +58,52 @@ GL_LIBS = -lGL -lXext -lX11
 CC=gcc
 
 # OPTIMISATION SETTINGS:
+# Use gcc option if defined UB_GCC_OPTIONS via "Environment variable" or "Command-line arguments".
+ifdef UB_GCC_OPTIONS
+  OPTON = $(UB_GCC_OPTIONS)
 
-## Very generic
-#OPTON = -O
+else
+  ## Very generic
+  #OPTON = -O
 
-## For Linux 486/Pentium, GCC 2.7.x and 2.8.x
-#OPTON = -O2 -fomit-frame-pointer -fforce-addr -fforce-mem -ffast-math \
-#	-m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2
+  ## For Linux 486/Pentium, GCC 2.7.x and 2.8.x
+  #OPTON = -O2 -fomit-frame-pointer -fforce-addr -fforce-mem -ffast-math \
+  #	-m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2
 
-## For Linux, GCC previous to 2.7.0
-#OPTON = -O2 -fomit-frame-pointer -fforce-addr -fforce-mem -ffast-math -m486
+  ## For Linux, GCC previous to 2.7.0
+  #OPTON = -O2 -fomit-frame-pointer -fforce-addr -fforce-mem -ffast-math -m486
 
-#OPTON = -O2 -fomit-frame-pointer -fforce-addr -fforce-mem -ffast-math \
-#	-m386 -malign-loops=1 -malign-jumps=1 -malign-functions=1
+  #OPTON = -O2 -fomit-frame-pointer -fforce-addr -fforce-mem -ffast-math \
+  #	-m386 -malign-loops=1 -malign-jumps=1 -malign-functions=1
 
-## For Solaris 2, or general-purpose GCC 2.7.x
-#OPTON = -O2 -fomit-frame-pointer -fforce-addr -ffast-math -Wall
+  ## For Solaris 2, or general-purpose GCC 2.7.x
+  #OPTON = -O2 -fomit-frame-pointer -fforce-addr -ffast-math -Wall
 
-## For Digital Unix v4.x, with DEC cc v5.x
-#OPTON = -O4
-#CFLAGS = -DTIME -std1 -verbose -w0
+  ## For Digital Unix v4.x, with DEC cc v5.x
+  #OPTON = -O4
+  #CFLAGS = -DTIME -std1 -verbose -w0
 
-## gcc optimization flags
-## (-ffast-math) disables strict IEEE or ISO rules/specifications for math funcs
-OPTON = -O3 -ffast-math
+  ## gcc optimization flags
+  ## (-ffast-math) disables strict IEEE or ISO rules/specifications for math funcs
+  OPTON = -O3 -ffast-math
 
-## OS detection.  Comment out if gmake syntax not supported by other 'make'.
-OSNAME:=$(shell uname -s)
+  ## OS detection.  Comment out if gmake syntax not supported by other 'make'. 
+  OSNAME:=$(shell uname -s)
+  ifeq ($(OSNAME),Linux)
+    # Not all CPU architectures support "-march" or "-march=native".
+    #   - Supported    : x86, x86_64, ARM, AARCH64, etc..
+    #   - Not Supported: RISC-V, IBM Power, etc...
+    OPTON += -march=native -mtune=native
+  endif
+
+  ifeq ($(OSNAME),Darwin)
+    # (adjust flags or comment out this section for older versions of XCode or OS X)
+    # (-mmacosx-versin-min= requires at least that version of SDK be installed)
+    OPTON += -march=native -mmacosx-version-min=10.10
+    #http://stackoverflow.com/questions/9840207/how-to-use-avx-pclmulqdq-on-mac-os-x-lion/19342603#19342603
+    CFLAGS += -Wa,-q
+  endif
 
-ifeq ($(OSNAME),Linux)
-OPTON += -march=native -mtune=native
-endif
-ifeq ($(OSNAME),Darwin)
-# (adjust flags or comment out this section for older versions of XCode or OS X)
-# (-mmacosx-versin-min= requires at least that version of SDK be installed)
-OPTON += -march=native -mmacosx-version-min=10.10
-#http://stackoverflow.com/questions/9840207/how-to-use-avx-pclmulqdq-on-mac-os-x-lion/19342603#19342603
-CFLAGS += -Wa,-q
 endif
 
 
diff --git a/UnixBench/Run b/UnixBench/Run
index a3c5b81..b4abd26 100755
--- a/UnixBench/Run
+++ b/UnixBench/Run
@@ -1585,6 +1585,48 @@ sub summarizeRun {
 }
 
 
+# Write CSV Headers.
+#   e.g.: "Concurrency,Dhrystone 2 using register variables,Double-Precision Whetstone"
+#       
+sub summarizeRunCsvHeader {
+    my ( $results, $reportFd ) = @_;
+
+    # First col is for Concurrency value.
+    printf $reportFd "Concurrency";
+
+    # Write CSV Headers of test.
+    foreach my $bench (@{$results->{'list'}}) {
+        my $bresult = $results->{$bench};
+        printf $reportFd ",%s", $bresult->{'msg'};
+    }
+    printf $reportFd "\n";
+}
+
+# Write CSV data rows per concurrency as "./Run -c 1 -c 2".
+#   e.g.: 1,33526940.9,3623.9
+#         2,30386997.8,3678.8
+#         4,31439797.3,3781.4
+#         8,32872262.9,3826.2
+sub summarizeRunCsvRows {
+    my ( $results, $reportFd) = @_;
+
+    # Write concurrency value.
+    printf $reportFd "%d", $results->{'copies'};
+    
+    # Write test results.
+    my $isFirstColumn = 1;
+    foreach my $bench (@{$results->{'list'}}) {
+        my $bresult = $results->{$bench};
+
+        printf $reportFd ",%.1f", $bresult->{'score'};
+        $isFirstColumn = 0;
+    }
+
+    printf $reportFd "\n";
+}
+
+
+
 ############################################################################
 # HTML REPORTS
 ############################################################################
@@ -1887,13 +1929,26 @@ sub main {
     # Generate unique file names for the report and log file.
     my $reportFile = logFile($systemInfo);
     my $reportHtml = $reportFile . ".html";
+    my $reportCsv = $reportFile . ".csv";
     my $logFile = $reportFile . ".log";
 
+    # If defined "UB_OUTPUT_CSV" on Environment, output csv file.
+    my $ubOutputCsv = $ENV{"UB_OUTPUT_CSV"};
+    my $isOutputFormatCsv = defined($ubOutputCsv) && $ubOutputCsv eq "true";
+    # If write CSV, header needs only once.
+    my $is_csv_header_written = 0;
+    
     # Open the log file for writing.
     open(my $reportFd, ">", $reportFile) ||
                             die("Run: can't write to $reportFile\n");
     open(my $reportFd2, ">", $reportHtml) ||
                             die("Run: can't write to $reportHtml\n");
+    my $reportFd_Csv;
+    if ($isOutputFormatCsv) {
+        open($reportFd_Csv, ">", $reportCsv) ||
+                            die("Run: can't write to $reportCsv\n");
+    }
+
     printf $reportFd "   BYTE UNIX Benchmarks (Version %s)\n\n", $version;
     runHeaderHtml($systemInfo, $reportFd2);
 
@@ -1912,6 +1967,14 @@ sub main {
 
         summarizeRun($systemInfo, $results, $verbose, $reportFd);
         summarizeRunHtml($systemInfo, $results, $verbose, $reportFd2);
+
+        if ($isOutputFormatCsv) {
+            if ( $is_csv_header_written == 0 ) {
+                summarizeRunCsvHeader($results, $reportFd_Csv);
+                $is_csv_header_written = 1;
+            }
+            summarizeRunCsvRows($results, $reportFd_Csv);
+        }
     }
 
     runFooterHtml($reportFd2);
@@ -1919,6 +1982,9 @@ sub main {
     # Finish the report.
     close($reportFd);
     close($reportFd2);
+    if ($isOutputFormatCsv) {
+        close($reportFd_Csv);
+    }
 
     # Display the report, if not in quiet mode.
     if ($verbose > 0) {
diff --git a/UnixBench/USAGE b/UnixBench/USAGE
index 748b033..29e5785 100644
--- a/UnixBench/USAGE
+++ b/UnixBench/USAGE
@@ -65,12 +65,12 @@ so that randomly-churning background processes don't randomise the results
 too much.  This is particularly true for the graphics tests.
 
 
-Output can be specified by using the following variables:
+Output can be specified by setting the following environment variables:
 
   * "UB_RESULTDIR" : Absolute path of output directory of result files.
   * "UB_TMPDIR" : Absolute path of temporary files for IO tests.
   * "UB_OUTPUT_FILE_NAME" : Output file name. If exists it will be overwritten.
-    
+  * "UB_OUTPUT_CSV"       : If set "true", output results(score only) to .csv.
 ============================================================================
 
 Tests