6 files changed, 23 insertions, 13 deletions

diff --git a/README.md b/README.md
index 726f9b1..b4ad4b3 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ To install `ted` on Linux, you will need:
 These can be installed on Ubuntu/Debian with:
 
 ```
-sudo apt install gcc libsdl2-dev wget unzip cmake
+sudo apt install clang libsdl2-dev wget unzip cmake
 ```
 
 Then run
diff --git a/build.c b/build.c
index 216c28e..ba85cdd 100644
--- a/build.c
+++ b/build.c
@@ -160,7 +160,7 @@ static int parse_nonnegative_integer(char32_t **str, char32_t *end) {
 	int n = 0;
 	for (number_len = 0; s != end && s[number_len] >= '0' && s[number_len] <= '9'; ++number_len) {
 		n *= 10;
-		n += s[number_len] - '0';
+		n += (int)s[number_len] - '0';
 	}
 	if (number_len == 0)
 		return -1;
diff --git a/gl.c b/gl.c
index a7f720f..8326de6 100644
--- a/gl.c
+++ b/gl.c
@@ -66,7 +66,14 @@ static int gl_version_minor;
 
 static void gl_get_procs(void) {
 	#define gl_get_proc(upper, lower) gl##lower = (PFNGL##upper##PROC)SDL_GL_GetProcAddress("gl" #lower);
+#if __GNUC__ && !__clang__
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
 	gl_for_each_proc(gl_get_proc)
+#if __GNUC__ && !__clang__
+	#pragma GCC diagnostic pop
+#endif
 	#undef gl_get_proc
 }
 
diff --git a/math.c b/math.c
index 42f6cb9..6fa309d 100644
--- a/math.c
+++ b/math.c
@@ -810,11 +810,12 @@ static u32 color_interpolate(float x, u32 color1, u32 color2) {
 	// to make it interpolate more nicely, convert to hsv, interpolate in that space, then convert back
 	c1 = color_rgba_to_hsva(c1);
 	c2 = color_rgba_to_hsva(c2);
-	float h1 = c1.x, s1 = c1.y, v1 = c1.z, a1 = c1.w;
-	float h2 = c2.x, s2 = c2.y, v2 = c2.z, a2 = c2.w;
+	// v_1/2 named differently to avoid shadowing
+	float h1 = c1.x, s1 = c1.y, v_1 = c1.z, a1 = c1.w;
+	float h2 = c2.x, s2 = c2.y, v_2 = c2.z, a2 = c2.w;
 	
 	float s_out = lerpf(x, s1, s2);
-	float v_out = lerpf(x, v1, v2);
+	float v_out = lerpf(x, v_1, v_2);
 	float a_out = lerpf(x, a1, a2);
 	
 	float h_out;
diff --git a/syntax.c b/syntax.c
index 19aca34..56dc15f 100644
--- a/syntax.c
+++ b/syntax.c
@@ -573,8 +573,10 @@ static void syntax_highlight_python(SyntaxState *state, char32_t const *line, u3
 	}
 	*state = 0;
 	if (in_string && string_is_multiline) {
-		*state |= SYNTAX_STATE_PYTHON_STRING
-			| (SYNTAX_STATE_PYTHON_STRING_DBL_QUOTED * string_is_dbl_quoted);
+		*state |= (SyntaxState)(
+			SYNTAX_STATE_PYTHON_STRING
+			| (SYNTAX_STATE_PYTHON_STRING_DBL_QUOTED * string_is_dbl_quoted)
+		);
 	}
 }
 
diff --git a/text.c b/text.c
index 9e9246f..cf951e1 100644
--- a/text.c
+++ b/text.c
@@ -322,12 +322,12 @@ top:
 		}
 		if (state->render) {
 			float r = state->color[0], g = state->color[1], b = state->color[2], a = state->color[3];
-			TextVertex v1 = {{x0, y0}, {s0, t0}, {r, g, b, a}};
-			TextVertex v2 = {{x0, y1}, {s0, t1}, {r, g, b, a}};
-			TextVertex v3 = {{x1, y1}, {s1, t1}, {r, g, b, a}};
-			TextVertex v4 = {{x1, y0}, {s1, t0}, {r, g, b, a}};
-			TextTriangle triangle1 = {v1, v2, v3};
-			TextTriangle triangle2 = {v3, v4, v1};
+			TextVertex v_1 = {{x0, y0}, {s0, t0}, {r, g, b, a}};
+			TextVertex v_2 = {{x0, y1}, {s0, t1}, {r, g, b, a}};
+			TextVertex v_3 = {{x1, y1}, {s1, t1}, {r, g, b, a}};
+			TextVertex v_4 = {{x1, y0}, {s1, t0}, {r, g, b, a}};
+			TextTriangle triangle1 = {v_1, v_2, v_3};
+			TextTriangle triangle2 = {v_3, v_4, v_1};
 			arr_add(font->triangles[page], triangle1);
 			arr_add(font->triangles[page], triangle2);
 		}