Enable support for GCC 5 builds
Index: b/spectool_gtk_widget.h
===================================================================
--- a/spectool_gtk_widget.h
+++ b/spectool_gtk_widget.h
@@ -196,16 +196,16 @@
 gint spectool_widget_timeout(gpointer *data);
 
 /* Calculate the channel clicked in */
-inline int spectool_widget_find_chan_pt(SpectoolWidget *wwidget, int x, int y);
+/*inline*/ int spectool_widget_find_chan_pt(SpectoolWidget *wwidget, int x, int y);
 
 void spectool_widget_context_channels(gpointer *aux);
 void spectool_widget_context_dbm(gpointer *aux);
 void spectool_widget_context_dbmlines(gpointer *aux);
 
 /* Color space conversion tools */
-inline void rgb_to_hsv(double r, double g, double b, 
+/*inline*/ void rgb_to_hsv(double r, double g, double b,
 					   double *h, double *s, double *v);
-inline void hsv_to_rgb(double *r, double *g, double *b, 
+/*inline*/ void hsv_to_rgb(double *r, double *g, double *b,
 					   double h, double s, double v);
 
 G_END_DECLS
Index: b/spectool_gtk_channel.c
===================================================================
--- a/spectool_gtk_channel.c
+++ b/spectool_gtk_channel.c
@@ -39,7 +39,7 @@
 
 G_DEFINE_TYPE(SpectoolChannel, spectool_channel, SPECTOOL_TYPE_WIDGET);
 
-inline int spectool_channel_find_chan_pt(SpectoolChannel *cwidget, int x, int y) {
+/*inline*/ int spectool_channel_find_chan_pt(SpectoolChannel *cwidget, int x, int y) {
 	int dbm, maxy, nchannels;
 	SpectoolWidget *wwidget;
 
Index: b/spectool_gtk_widget.c
===================================================================
--- a/spectool_gtk_widget.c
+++ b/spectool_gtk_widget.c
@@ -876,7 +876,7 @@
 
 /* Annoying that nothing else seems to include this, but we need it for
  * calculating the gradient of colors for the channel highlights */
-inline void rgb_to_hsv(double r, double g, double b, 
+/*inline*/ void rgb_to_hsv(double r, double g, double b,
 					   double *h, double *s, double *v) {
 	double min, delta;
 
@@ -956,7 +956,7 @@
 	}
 }
 
-inline void hsv_to_rgb(double *r, double *g, double *b, 
+/*inline*/ void hsv_to_rgb(double *r, double *g, double *b,
 					   double h, double s, double v) {
 	double hf = h / 60;
 	int i = floor(hf);
