diff options
| -rw-r--r-- | m4/regex.m4 | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/m4/regex.m4 b/m4/regex.m4 index 35759aabc..08438f4b9 100644 --- a/m4/regex.m4 +++ b/m4/regex.m4 @@ -1,4 +1,4 @@ -#serial 8 +#serial 9 dnl Initially derived from code in GNU grep. dnl Mostly written by Jim Meyering. @@ -28,6 +28,7 @@ AC_DEFUN(jm_INCLUDED_REGEX, { static struct re_pattern_buffer regex; const char *s; + struct re_registers regs; re_set_syntax (RE_SYNTAX_POSIX_EGREP); /* Add this third left square bracket, [, to balance the three right ones below. Otherwise autoconf-2.14 chokes. */ @@ -39,7 +40,20 @@ AC_DEFUN(jm_INCLUDED_REGEX, /* This should succeed, but doesn't for e.g. glibc-2.1.3. */ s = re_compile_pattern ("{1", 2, ®ex); - exit (s ? 1 : 0); + if (s) + exit (1); + + /* The following example is derived from a problem report + against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */ + s = re_compile_pattern ("[anù]*n", 7, ®ex); + if (s) + exit (1); + + /* This should match, but doesn't for e.g. glibc-2.2.1. */ + if (re_match (®ex, "an", 2, 0, ®s) != 2) + exit (1); + + exit (0); } ], jm_cv_func_working_re_compile_pattern=yes, |