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https://bugs.gentoo.org/707452
--- a/sig2str.c
+++ b/sig2str.c
@@ -63,7 +63,7 @@ extern const unsigned int sys_nsigname; /* also from sys_signame.c */
#endif
#if !defined(SYS_SIGNAME_DECLARED)
-const char *const sys_signame[]; /* defined in sys_signame.c */
+extern const char *const sys_signame[]; /* defined in sys_signame.c */
#endif
#if !defined(HAVE_DECL_SIG2STR)
--- a/str2sig.c
+++ b/str2sig.c
@@ -29,7 +29,7 @@ static const char rcsid[] =
#include "newsyslog.h" /* generic portability definitions */
#if !defined(SYS_SIGNAME_DECLARED)
-const char *const sys_signame[]; /* defined in signame.c */
+extern const char *const sys_signame[]; /* defined in signame.c */
#endif
/* NetBSD gained sys_nsig sometime just prior to 1.4 */
@@ -65,7 +65,7 @@ extern const unsigned int sys_nsigname; /* also from sys_signame.c */
#endif
#if !defined(SYS_SIGNAME_DECLARED)
-const char *const sys_signame[]; /* defined in sys_signame.c */
+extern const char *const sys_signame[]; /* defined in sys_signame.c */
#endif
#if !defined(HAVE_DECL_STR2SIG)
--- a/sys_signame.c
+++ b/sys_signame.c
@@ -22,7 +22,7 @@
#include "config.h"
#include <sys/types.h>
-const char *const sys_signame[] = {
+extern const char *const sys_signame[] = {
/* 0 */ "Signal 0", /* Fake value for zero */
/* 1 */ "HUP", /* Control TTY hangup */
/* 2 */ "INT", /* Control TTY interrupt */
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