i've whote an "ugly" implementation of a pipe-friendly mode

src/arm.c

@@ -17,6 +17,8 @@
 #endif
 #include <assert.h>
 
+#include <stdbool.h>
+extern bool quiet;
 #include "hwcap.h"
 
 /**
@@ -142,7 +144,7 @@ struct flag_info flags[] = {
  *
  * Returns exit status (0 on success, non-zero on failure).
  */
-int print_flags()
+int print_flags( bool quiet )
 {
 	unsigned long hwcap, hwcap2, subarch = 0;
 	char* uname_m;
@@ -180,7 +182,10 @@ int print_flags()
 		return 1;
 	}
 
-	fputs("CPU_FLAGS_ARM:", stdout);
+    if (!quiet)
+    {
+        fputs("CPU_FLAGS_ARM:", stdout);
+    }
 
 	for (i = 0; flags[i].name; ++i)
 	{

src/main.c

@@ -11,25 +11,29 @@
 #include <getopt.h>
 #include <stdio.h>
 
-int print_flags();
+#include <stdbool.h>
+bool quiet = false;
+int print_flags(bool quiet);
 
 struct option long_options[] = {
 	{ "help", no_argument, 0, 'h' },
 	{ "version", no_argument, 0, 'V' },
+    { "quiet", no_argument, 0, 'q' },
 	{ 0, 0, 0, 0 }
 };
 
 const char* usage = "Usage: %s [options]\n"
 	"\n"
 	"Options:\n"
 	"  -h, --help               print this help message\n"
-	"  -V, --version            print program version\n";
+	"  -V, --version            print program version\n"
+    "  -q, --quiet              make output easily pipeable, remove cpu type\n";
 
 int main(int argc, char* argv[])
 {
 	int opt;
 
-	while ((opt = getopt_long(argc, argv, "hV", long_options, 0)) != -1)
+	while ((opt = getopt_long(argc, argv, "hVq", long_options, 0)) != -1)
 	{
 		switch (opt)
 		{
@@ -39,17 +43,19 @@ int main(int argc, char* argv[])
 			case 'V':
 				puts(PACKAGE_STRING);
 				return 0;
+            case 'q':
+                quiet = true; //TODO this doesn't work?
+                return print_flags(quiet);
 			case '?':
 				fprintf(stderr, usage, argv[0]);
 				return 1;
 		}
 	}
-	if (optind != argc)
-	{
-		fprintf(stderr, "%s: unexpected position parameter\n", argv[0]);
-		fprintf(stderr, usage, argv[0]);
-		return 1;
-	}
-
-	return print_flags();
+    if (optind != argc)
+    {
+        fprintf(stderr, "%s: unexpected position parameter\n", argv[0]);
+        fprintf(stderr, usage, argv[0]);
+        return 1;
+    }
+    return print_flags(quiet);
 }

src/ppc.c

@@ -19,6 +19,8 @@
 #endif
 #include <assert.h>
 
+#include <stdbool.h>
+extern bool quiet;
 #include "hwcap.h"
 
 /**
@@ -59,15 +61,18 @@ struct flag_info flags[] = {
  *
  * Returns exit status (0 on success, non-zero on failure).
  */
-int print_flags()
+int print_flags( bool quiet )
 {
 	unsigned long hwcap = 0, hwcap2 = 0;
 	int i;
 
 	hwcap = get_hwcap();
 	hwcap2 = get_hwcap2();
 
-	fputs("CPU_FLAGS_PPC:", stdout);
+    if (!quiet)
+    {
+	    fputs("CPU_FLAGS_PPC:", stdout);
+    }
 
 	for (i = 0; flags[i].name; ++i)
 	{

src/x86.c

@@ -16,6 +16,7 @@
 #	include <stdint.h>
 #endif
 #include <assert.h>
+#include <stdbool.h>
 
 #include "x86.h"
 
@@ -91,7 +92,7 @@ struct flag_info flags[] = {
  *
  * Returns exit status (0 on success, non-zero on failure).
  */
-int print_flags()
+int print_flags( bool quiet )
 {
 	uint32_t intel_ecx = 0, intel_edx = 0, intel_sub0_ebx = 0, intel_sub0_ecx = 0;
 	uint32_t amd_ecx = 0, amd_edx = 0;
@@ -111,7 +112,10 @@ int print_flags()
 	/* Centaur (VIA) */
 	got_centaur = run_cpuid(0xC0000001, 0, 0, 0, &centaur_edx);
 
-	fputs("CPU_FLAGS_X86:", stdout);
+    if (!quiet)
+    {
+        fputs("CPU_FLAGS_X86:", stdout);
+    }
 
 	for (i = 0; flags[i].name; ++i)
 	{

tests/test.sh

@@ -29,8 +29,13 @@ fi
 echo "Expected: ${EXPECTED}"
 echo "Result:   ${RESULT}"
 if [ "${EXPECTED}" != "${RESULT}" ]; then
-	echo "Result does not match!" >&2
-	RET=1
+  IFS=':' read -ra ADDR <<< "$IN"
+  for i in "${ADDR[@]}"; do
+    if [ "${EXPECTED}" != "${RESULT}" ]; then
+      echo "Result does not match!" >&2
+      RET=1
+    fi
+  done
 fi
 
 exit "${RET}"