signal: Move sys_errlist to a compat symbol

The symbol is deprecated by strerror since its usage imposes some issues
such as copy relocations.

Its internal name is also changed to _sys_errlist_internal to avoid
static linking usage.  The compat code is also refactored by removing
the over enginered errlist-compat.c generation from manual entried and
extra comment token in linker script file.  It disantangle the code
generation from manual and simplify both Linux and Hurd compat code.

The definitions from errlist.c are moved to errlist.h and a new test
is added to avoid a new errno entry without an associated one in manual.

Checked on x86_64-linux-gnu and i686-linux-gnu. I also run a check-abi
on all affected platforms.

Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 0 insertions, 10 deletions

diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions
index 52ca223..f72741b 100644
--- a/sysdeps/unix/sysv/linux/Versions
+++ b/sysdeps/unix/sysv/linux/Versions
@@ -1,9 +1,4 @@
 libc {
-  # The comment lines with "#errlist-compat" are magic; see errlist-compat.awk.
-  # When you get an error from errlist-compat.awk, you need to add a new
-  # version here.  Don't do this blindly, since this means changing the ABI
-  # for all GNU/Linux configurations.
-
   GLIBC_2.0 {
     # functions used in inline functions or macros
     __cmsg_nxthdr;
@@ -56,7 +51,6 @@ libc {
     # u*
     umount; uselib;
 
-    #errlist-compat	123
     _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
   }
   GLIBC_2.1 {
@@ -84,7 +78,6 @@ libc {
     # u*
     umount2;
 
-    #errlist-compat	125
     _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
   }
   GLIBC_2.2 {
@@ -102,7 +95,6 @@ libc {
     # r*
     readahead;
 
-    #errlist-compat	126
     _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
   }
   GLIBC_2.3.2 {
@@ -120,7 +112,6 @@ libc {
 
     unshare;
 
-    #errlist-compat	132
     _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
   }
   GLIBC_2.5 {
@@ -142,7 +133,6 @@ libc {
     fallocate;
   }
   GLIBC_2.12 {
-    #errlist-compat	135
     _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
 
     ntp_gettimex;