diff options
Diffstat (limited to 'gdb/configure.ac')
| -rw-r--r-- | gdb/configure.ac | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gdb/configure.ac b/gdb/configure.ac index 6a7e0c90d4e..a40860ad432 100644 --- a/gdb/configure.ac +++ b/gdb/configure.ac @@ -1444,6 +1444,35 @@ if test $ac_cv_func_setpgrp_void = yes; then fi fi +# Assume we'll default to using the included libiberty regex. +gdb_use_included_regex=yes + +# However, if the system regex is GNU regex, then default to *not* +# using the included regex. +AC_CACHE_CHECK( + [for GNU regex], + [gdb_cv_have_gnu_regex], + [AC_TRY_COMPILE( + [#include <gnu-versions.h>], + [#define REGEX_INTERFACE_VERSION 1 +#if _GNU_REGEX_INTERFACE_VERSION != REGEX_INTERFACE_VERSION +# error "Version mismatch" +#endif], + gdb_cv_have_gnu_regex=yes, + gdb_cv_have_gnu_regex=no)]) +if test $gdb_cv_have_gnu_regex = yes; then + gdb_use_included_regex=no +fi + +AC_ARG_WITH(included-regex, + AS_HELP_STRING([--without-included-regex], [don't use included regex; this is the default on systems with version 2 of the GNU C library (use with caution on other system)]), + gdb_with_regex=$withval, + gdb_with_regex=$gdb_use_included_regex) +if test "$gdb_with_regex" = yes; then + AC_DEFINE(USE_INCLUDED_REGEX, 1, + [Define to 1 if the regex included in libiberty should be used.]) +fi + # Check if <sys/proc.h> defines `struct thread' with a td_pcb member. AC_CHECK_MEMBERS([struct thread.td_pcb], [], [], [#include <sys/param.h> |