More fixing C

src/FileSystem.cake

@@ -1,9 +1,12 @@
+;; For strdup, strerror_r
+(add-build-options "-D_POSIX_C_SOURCE=200809L")
+
 (import "DynamicArray.cake"
         "FileUtilities.cake"
         "CHelpers.cake" "ComptimeHelpers.cake"
         &with-decls "DynamicArray.cake")
 
-(c-import "<stdio.h>"
+(c-import "<stdio.h>" "<string.h>"
           &with-decls "<stddef.h>" "<stdbool.h>") ;; for size_t
 
 (var filesystem-verbose-logging bool false)

src/SDL.cake

@@ -247,10 +247,12 @@
   (return name))
 
 ;; TODO Cakelisp CHelpers support flags
-(var-global keybind-modifier-flags-none (unsigned char) 0)
-(var-global keybind-modifier-flags-ctrl (unsigned char) (bit-shift-<< 1 0))
-(var-global keybind-modifier-flags-shift (unsigned char) (bit-shift-<< 1 1))
-(var-global keybind-modifier-flags-alt (unsigned char) (bit-shift-<< 1 2))
+(export-and-evaluate
+ ;; These are defines for C compilation support (avoids initializer not constant)
+ (c-preprocessor-define-constant keybind-modifier-flags-none 0)
+ (c-preprocessor-define-constant keybind-modifier-flags-ctrl (bit-shift-<< 1 0))
+ (c-preprocessor-define-constant keybind-modifier-flags-shift (bit-shift-<< 1 1))
+ (c-preprocessor-define-constant keybind-modifier-flags-alt (bit-shift-<< 1 2)))
 
 (defstruct keybind-key
   key (unsigned int)