Fixes and docs from osx

GNUmakefile

@@ -7,7 +7,7 @@ mandir ?= /share/man/man1
 MAKEFLAGS += --no-builtin-rules
 
 WARNINGS = -Wall -Wextra -Wpedantic -Wformat=2 -Wstrict-aliasing=3 -Wstrict-overflow=5 -Wstack-usage=12500 \
-	-Wfloat-equal -Wcast-align -Wpointer-arith -Wchar-subscripts -Warray-bounds=2
+	-Wfloat-equal -Wcast-align -Wpointer-arith -Wchar-subscripts -Warray-bounds=2 -Wno-unknown-warning-option
 
 override CFLAGS ?= -g -O2 $(WARNINGS)
 override CFLAGS += -std=c99

README.md

@@ -37,6 +37,19 @@ make install PREFIX=/usr
 make doxygen
 ```
 
+## OSX
+
+```sh
+# Make sure you have GNU Make and pkg-config installed
+brew install make pkg-config
+
+# You may need to setup your pkg-config to point to brew version of the libraries
+# For example to build curses renderer, you'd do:
+PKG_CONFIG_PATH="/usr/local/opt/ncurses/lib/pkgconfig" gmake curses
+
+# Other than that, follow the normal build steps, but use gmake instead of make
+```
+
 ## Environment variables
 
 | Variable         | Description                             | Value                |

lib/internal.h

@@ -339,7 +339,7 @@ void list_sort(struct list *list, int (*compar)(const void *a, const void *b));
 char* bm_strdup(const char *s);
 bool bm_resize_buffer(char **in_out_buffer, size_t *in_out_size, size_t nsize);
 BM_LOG_ATTR(1, 2) char* bm_dprintf(const char *fmt, ...);
-bool bm_vrprintf(char **in_out_buffer, size_t *in_out_len, const char *fmt, va_list args);
+BM_LOG_ATTR(3, 0) bool bm_vrprintf(char **in_out_buffer, size_t *in_out_len, const char *fmt, va_list args);
 size_t bm_strip_token(char *string, const char *token, size_t *out_next);
 int bm_strupcmp(const char *hay, const char *needle);
 int bm_strnupcmp(const char *hay, const char *needle, size_t len);