Add 'extern' to tgl_allocator declaration in tools.h to prevent multiple definition error when used as static library

1 files changed, 1 insertions, 1 deletions

diff --git a/tools.h b/tools.h
index c9b7838..aa4c2bc 100644
--- a/tools.h
+++ b/tools.h
@@ -40,7 +40,7 @@
 #define tsnprintf tgl_snprintf
 
 
-struct tgl_allocator *tgl_allocator;
+extern struct tgl_allocator *tgl_allocator;
 double tglt_get_double_time (void);
 
 int tgl_inflate (void *input, int ilen, void *output, int olen);