From 3ecedd11dd869d38588c149c1bf6f3fd48070ce0 Mon Sep 17 00:00:00 2001
From: Colin Dean <git@cad.cx>
Date: Sun, 8 Apr 2018 11:49:07 -0400
Subject: [PATCH 1/3] Silences a few build warnings

---
 font.h    | 2 +-
 optar.c   | 2 +-
 unoptar.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/font.h b/font.h
index 49e0b7a..77a7ae1 100644
--- a/font.h
+++ b/font.h
@@ -269,7 +269,7 @@ static char header_data_cmap[256][3] = {
 	{255,255,255},
 	{255,255,255}
 	};
-static char header_data[] = {
+static char header_data[36000] = {
 	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
diff --git a/optar.c b/optar.c
index b7739ad..c6c9d13 100644
--- a/optar.c
+++ b/optar.c
@@ -16,7 +16,7 @@
 #define HEIGHT (2*BORDER+DATA_HEIGHT+TEXT_HEIGHT)
 #define TEXT_HEIGHT 24
 
-static unsigned char ary[WIDTH*HEIGHT];
+static unsigned char ary[WIDTH * HEIGHT];
 static unsigned char *file_label=(unsigned char *)""; /* The filename written in the
 					file_label */
 static char *output_filename; /* The output filename */
diff --git a/unoptar.c b/unoptar.c
index 5cd6e76..afcead7 100644
--- a/unoptar.c
+++ b/unoptar.c
@@ -316,7 +316,7 @@ static double angle(double x, double y)
 {
 	double deg;
 
-	if (abs(x)>abs(y)){
+	if (fabs(x)>fabs(y)){
 		/* Horizontal */
 		deg=180/M_PI*asin(y);
 		if (x<0) deg=180-deg;

From a3f7e4765f80f6c2f2b5ad28568dac946cbfaaac Mon Sep 17 00:00:00 2001
From: Colin Dean <git@cad.cx>
Date: Sun, 8 Apr 2018 12:01:21 -0400
Subject: [PATCH 2/3] Adds some compiler-specific configuration

Mostly to silence warnings. I hate buzzers going off!
---
 Makefile | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index dc32b61..cd6b04c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,14 @@
 CC?=gcc
 LDFLAGS=-lm
-CFLAGS=-O3 -Wall -Wuninitialized -fomit-frame-pointer -funroll-loops \
-	-fstrength-reduce -DNODEBUG `libpng-config --I_opts`
+ifeq ($(CC), gcc)
+  SPECIFIC_CFLAGS=-fstrength-reduce
+else
+  SPECIFIC_CFLAGS=
+endif
+CFLAGS=-O3 -Wall -Wuninitialized \
+       -fomit-frame-pointer -funroll-loops \
+			 $(SPECIFIC_CFLAGS) \
+	     -DNODEBUG `libpng-config --I_opts`
 
 all: optar unoptar
 

From 9c8379c25466bf142459a26b0f34521bdde2af12 Mon Sep 17 00:00:00 2001
From: Colin Dean <git@cad.cx>
Date: Sun, 8 Apr 2018 12:03:44 -0400
Subject: [PATCH 3/3] Explicitly declares variable types for ints

GCC 7 discourages implicit typing
---
 optar.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/optar.c b/optar.c
index c6c9d13..1f2cba1 100644
--- a/optar.c
+++ b/optar.c
@@ -109,7 +109,7 @@ void border(void)
 	memset(ptr,0,BORDER*WIDTH);
 }
 
-void cross(x,y)
+void cross(int x, int y)
 {
 	unsigned char *ptr=ary+y*WIDTH+x;
 	unsigned c;
@@ -132,7 +132,7 @@ void crosses(void)
 }
 
 /* x is in the range 0 to DATA_WIDTH-1 */
-void text_block (destx, srcx, width)
+void text_block (int destx, int srcx, int width)
 {
 	int x, y;
 	unsigned char *srcptr;