cpupower: make NLS truly optional

Loosely based on a patch for cpufrequtils, submittted by
Sergey Dryabzhinsky <sergey.dryabzhinsky@gmail.com> and
signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

tools/power/cpupower/Makefile

@@ -137,6 +137,7 @@ CFLAGS +=	-pipe
 ifeq ($(strip $(NLS)),true)
 	INSTALL_NLS += install-gmo
 	COMPILE_NLS += create-gmo
+	CFLAGS += -DNLS
 endif
 
 ifeq ($(strip $(CPUFREQ_BENCH)),true)

tools/power/cpupower/utils/helpers/helpers.h

@@ -16,11 +16,20 @@
 #include "helpers/bitmask.h"
 
 /* Internationalization ****************************/
+#ifdef NLS
+
 #define _(String) gettext(String)
 #ifndef gettext_noop
 #define gettext_noop(String) String
 #endif
 #define N_(String) gettext_noop(String)
+
+#else /* !NLS */
+
+#define _(String) String
+#define N_(String) String
+
+#endif
 /* Internationalization ****************************/
 
 extern int run_as_root;