test: stop using lots of bss.

function                                             old     new   delta
test_main                                            425     456     +31
t_lex                                                 69      73      +4
syntax                                               100     104      +4
ptr_to_statics                                         8      12      +4
t_wp_op                                                4       -      -4
t_wp                                                   4       -      -4
ngroups                                                4       -      -4
group_array                                            4       -      -4
binop                                                590     585      -5
oexpr                                                104      97      -7
aexpr                                                101      94      -7
nexpr                                                831     820     -11
leaving                                              156       -    -156
------------------------------------------------------------------------------
(add/remove: 0/5 grow/shrink: 4/4 up/down: 43/-202)          Total: -159 bytes
   text    data     bss     dec     hex filename
 775098     929    9084  785111   bfad7 busybox_old
 775107     933    8908  784948   bfa34 busybox_unstripped

1 files changed, 2 insertions, 0 deletions

diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 4d33834ce..07db6358d 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -121,6 +121,8 @@ struct statics {
 #endif
 };
 
+/* Make it reside in writable memory, yet make compiler understand
+ * that it is not going to change. */
 static struct statics *const ptr_to_statics __attribute__ ((section (".data")));
 
 #define S (*ptr_to_statics)