diff options
Diffstat (limited to 'gdb/regex.c')
| -rw-r--r-- | gdb/regex.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/gdb/regex.c b/gdb/regex.c index 9b6dc5b..3f30284 100644 --- a/gdb/regex.c +++ b/gdb/regex.c @@ -93,8 +93,16 @@ init_syntax_once () #define BYTEWIDTH 8 -#ifndef SIGN_EXTEND_CHAR -#define SIGN_EXTEND_CHAR(x) (x) +/* We remove any previous definition of `SIGN_EXTEND_CHAR', + since ours (we hope) works properly with all combinations of + machines, compilers, `char' and `unsigned char' argument types. + (Per Bothner suggested the basic approach.) */ +#undef SIGN_EXTEND_CHAR +#if __STDC__ +#define SIGN_EXTEND_CHAR(c) ((signed char) (c)) +#else /* not __STDC__ */ +/* As in Harbison and Steele. */ +#define SIGN_EXTEND_CHAR(c) ((((unsigned char) (c)) ^ 128) - 128) #endif static int obscure_syntax = 0; |