diff options
Diffstat (limited to 'gdb/common/common.m4')
| -rw-r--r-- | gdb/common/common.m4 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gdb/common/common.m4 b/gdb/common/common.m4 index a87579a..e48dd5a 100644 --- a/gdb/common/common.m4 +++ b/gdb/common/common.m4 @@ -44,4 +44,33 @@ gdb_cv_func_sigsetjmp=yes, gdb_cv_func_sigsetjmp=no)]) if test $gdb_cv_func_sigsetjmp = yes; then AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available. ]) 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 ]) |