stbi: make static

not to spoil the global namespace

+ since some functions are not used, it may also save a few bytes in build

Author: MartinPulec

src/utils/image_delegate.c

@@ -46,11 +46,17 @@
 #define strtok_s strtok_r
 #endif
 
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
 #include "../gpujpeg_common_internal.h"
 #include "../../libgpujpeg/gpujpeg_decoder.h" // ddecoder placeholders
 #include "image_delegate.h"
 #include "pam.h"
 #define STB_IMAGE_WRITE_IMPLEMENTATION
+#define STB_IMAGE_WRITE_STATIC
 #include "stb_image_write.h"
 #include "y4m.h"
 
@@ -68,8 +74,13 @@ gpujpeg_cuda_realloc_sized_host(void* ptr, int oldsz, int newsz);
 #define STBI_FREE gpujpeg_cuda_free_host
 #define STBI_REALLOC_SIZED gpujpeg_cuda_realloc_sized_host
 #define STB_IMAGE_IMPLEMENTATION
+#define STB_IMAGE_STATIC
 #include "stb_image.h"
 
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
 enum {
   DEPTH_8B = 8,
   MAXVAL_8B = 255,