Compile with -fno-common
https://github.com/ggreer/the_silver_searcher/commit/21eaa1c4160b868b0c5bbf59da17974429f30055

Index: src/options.c
--- src/options.c.orig
+++ src/options.c
@@ -20,6 +20,8 @@ const char *color_line_number = "\033[1;33m"; /* bold 
 const char *color_match = "\033[30;43m";      /* black with yellow background */
 const char *color_path = "\033[1;32m";        /* bold green */
 
+cli_options opts;
+
 /* TODO: try to obey out_fd? */
 void usage(void) {
     printf("\n");
