Fix the GCC build after _FORTIFY_SOURCE import

We haven't exposed gets(3) in a long time, rip out __gets_chk before
it's too late and something builds a gets(3) user with it enabled.

Author: kevans91

include/ssp/stdio.h

@@ -48,7 +48,6 @@ int __snprintf_chk(char *__restrict, size_t, int, size_t,
 int __vsnprintf_chk(char *__restrict, size_t, int, size_t,
      const char *__restrict, __va_list)
     __printflike(5, 0);
-char *__gets_chk(char *, size_t);
 char *__fgets_chk(char *, int, size_t, FILE *);
 __END_DECLS
 
@@ -78,11 +77,6 @@ __END_DECLS
         fmt, ap);			\
 })
 
-#define gets(str) ({			\
-   char *_ssp_str = (str);		\
-    __gets_chk(_ssp_str, __ssp_bos(_ssp_str));	\
-})
-
 #define fgets(str, len, fp) ({		\
     char *_ssp_str = (str);		\
     __fgets_chk(_ssp_str, len, __ssp_bos(_ssp_str), fp);	\

lib/libc/secure/Makefile.inc

@@ -4,7 +4,7 @@
 .PATH: ${LIBC_SRCTOP}/secure
 
 # _FORTIFY_SOURCE
-SRCS+=	gets_chk.c fgets_chk.c memcpy_chk.c memmove_chk.c memset_chk.c \
+SRCS+=	fgets_chk.c memcpy_chk.c memmove_chk.c memset_chk.c \
 	snprintf_chk.c sprintf_chk.c stpcpy_chk.c stpncpy_chk.c \
 	strcat_chk.c strcpy_chk.c strncat_chk.c strncpy_chk.c \
 	vsnprintf_chk.c vsprintf_chk.c

lib/libc/secure/Symbol.map

@@ -5,7 +5,6 @@ FBSD_1.0 {
 };
 
 FBSD_1.8 {
-	__gets_chk;
 	__fgets_chk;
 	__memcpy_chk;
 	__memmove_chk;

lib/libc/secure/gets_chk.c

@@ -4,7 +4,7 @@ SHLIBDIR?=	/lib
 SHLIB=		ssp
 SHLIB_MAJOR=	0
 
-SSP_SRCS=	gets_chk.c fgets_chk.c memcpy_chk.c memmove_chk.c memset_chk.c \
+SSP_SRCS=	fgets_chk.c memcpy_chk.c memmove_chk.c memset_chk.c \
 		snprintf_chk.c sprintf_chk.c stpcpy_chk.c stpncpy_chk.c \
 		strcat_chk.c strcpy_chk.c strncat_chk.c strncpy_chk.c \
 		vsnprintf_chk.c vsprintf_chk.c

lib/libssp/Makefile

@@ -20,7 +20,6 @@ LIBSSP_1.0 {
 };
 
 LIBSSP_1.1 {
-	__gets_chk;
 	__fgets_chk;
 	__memmove_chk;
 	__stpncpy_chk;

lib/libssp/Symbol.map

@@ -49,8 +49,6 @@
 .Ft int
 .Fn vsnprintf "char *str" "size_t len" "const char *fmt" "va_list ap"
 .Ft char *
-.Fn gets "char *str"
-.Ft char *
 .Fn fgets "char *str" "int len" "FILE *fp"
 .In ssp/string.h
 .Ft void *