1 files changed, 15 insertions, 10 deletions

diff --git a/src/pretty_printing.h b/src/pretty_printing.h
index 88028fdec..7389ad97f 100644
--- a/src/pretty_printing.h
+++ b/src/pretty_printing.h
@@ -3,52 +3,55 @@
 // Pretty printing helpers
 //
 
+#ifndef _pretty_printing_h
+#define _pretty_printing_h
+
 #include <ostream>
 
 #include "emscripten-optimizer/colors.h"
 
-std::ostream &doIndent(std::ostream &o, unsigned indent) {
+inline std::ostream &doIndent(std::ostream &o, unsigned indent) {
   for (unsigned i = 0; i < indent; i++) {
     o << "  ";
   }
   return o;
 }
 
-std::ostream &incIndent(std::ostream &o, unsigned& indent) {
+inline std::ostream &incIndent(std::ostream &o, unsigned& indent) {
   o << '\n';
   indent++;
   return o; 
 }
 
-std::ostream &decIndent(std::ostream &o, unsigned& indent) {
+inline std::ostream &decIndent(std::ostream &o, unsigned& indent) {
   indent--;
   doIndent(o, indent);
   return o << ')';
 }
 
-std::ostream &prepareMajorColor(std::ostream &o) {
+inline std::ostream &prepareMajorColor(std::ostream &o) {
   Colors::red(o);
   Colors::bold(o);
   return o;
 }
 
-std::ostream &prepareColor(std::ostream &o) {
+inline std::ostream &prepareColor(std::ostream &o) {
   Colors::magenta(o);
   Colors::bold(o);
   return o;
 }
 
-std::ostream &prepareMinorColor(std::ostream &o) {
+inline std::ostream &prepareMinorColor(std::ostream &o) {
   Colors::orange(o);
   return o;
 }
 
-std::ostream &restoreNormalColor(std::ostream &o) {
+inline std::ostream &restoreNormalColor(std::ostream &o) {
   Colors::normal(o);
   return o;
 }
 
-std::ostream& printText(std::ostream &o, const char *str) {
+inline std::ostream& printText(std::ostream &o, const char *str) {
   o << '"';
   Colors::green(o);
   o << str;
@@ -56,7 +59,7 @@ std::ostream& printText(std::ostream &o, const char *str) {
   return o << '"';
 }
 
-std::ostream& printOpening(std::ostream &o, const char *str, bool major=false) {
+inline std::ostream& printOpening(std::ostream &o, const char *str, bool major=false) {
   o << '(';
   major ? prepareMajorColor(o) : prepareColor(o);
   o << str;
@@ -64,7 +67,7 @@ std::ostream& printOpening(std::ostream &o, const char *str, bool major=false) {
   return o;
 }
 
-std::ostream& printMinorOpening(std::ostream &o, const char *str) {
+inline std::ostream& printMinorOpening(std::ostream &o, const char *str) {
   o << '(';
   prepareMinorColor(o);
   o << str;
@@ -72,3 +75,5 @@ std::ostream& printMinorOpening(std::ostream &o, const char *str) {
   return o;
 }
 
+#endif //  _pretty_printing_h
+