Add Makefile for OpenBSD

.gitignore

@@ -3,3 +3,4 @@ cmake*
 build
 compile_commands.json
 site
+libflint.so

Makefile

@@ -0,0 +1,29 @@
+.PHONY : clean
+
+CFLAGS =		-std=c99 -Iinclude -pedantic -Wall -Wextra
+LDFLAGS =		-fPIC -shared
+
+TARGET = 	libflint.so
+SRC !=		ls src/*.c
+OBJ =			$(SRC:./src/$.c=./obj/%.o)
+
+PREFIX =	$(DESTDIR)/usr/local
+LIBDIR =	$(PREFIX)/lib
+
+all: $(TARGET)
+
+$(TARGET): $(OBJ)
+	cc $(CFLAGS) $(LDFLAGS) -o $(TARGET) $(OBJ)
+
+./obj/%.o: ./src/%.c
+	cc $(CFLAGS) -c $< -o $@
+
+install: $(TARGET)
+	cp $(TARGET) $(LIBDIR)
+
+uninstall:
+	rm -f $(LIBDIR)/$(TARGET)
+
+clean:
+	rm -f $(TARGET)
+

src/math.c

@@ -76,3 +76,4 @@ Point *bresenham(int x0, int y0, int x1, int y1, size_t *sz) {
 Point *bresenham_p(Point p1, Point p2, size_t *sz) {
     return bresenham(p1.x, p1.y, p2.x, p2.y, sz);
 }
+

src/vector.c

@@ -31,7 +31,13 @@ int vec_init_with_capacity(Vector *vec, void (*destroy)(void *data), size_t capa
 
 static int vec_grow(Vector *const vec) {
     vec->capacity *= 2;
+
+#ifdef __OpenBSD__
+    vec->elements = reallocarray(vec->elements, vec->capacity, sizeof(void *));
+#else
     vec->elements = reallocf(vec->elements, sizeof(void *) * vec->capacity);
+#endif
+
     if (vec->elements == NULL) {
         return -1;
     }
@@ -106,7 +112,13 @@ int vec_shrink(Vector *vec) {
     }
 
     vec->capacity = vec_len(vec);
-    vec->elements = reallocf(vec, sizeof(void*) * vec_cap(vec));
+
+#ifdef __OpenBSD__
+    vec->elements = reallocarray(vec->elements, vec->capacity, sizeof(void *));
+#else
+    vec->elements = reallocf(vec->elements, sizeof(void *) * vec->capacity);
+#endif
+
     if (vec->elements == NULL) {
         return -1;
     }