diff options
| author | glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2012-11-13 02:12:40 +0000 |
|---|---|---|
| committer | glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2012-11-13 02:12:40 +0000 |
| commit | c5b19cf01cd15e0d9d8e2847ba746a5f361841df (patch) | |
| tree | 1c7e44cbc22b88e90df137a0fc52a454d1c3ebdc /configure.in | |
| parent | d24e2d746f417a041499e66cc54bafdf221f00ad (diff) | |
* re.c (rb_memsearch_ss): performance improvement by using memmem(3) if
possible. [ruby-dev:45530] [Feature #6311]
* configure.in: check existence of memmem(3) and that it is not broken.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37634 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/configure.in b/configure.in index aafada5e03..d2ba707a7b 100644 --- a/configure.in +++ b/configure.in @@ -2900,6 +2900,42 @@ if test "${universal_binary-no}" = yes ; then ])]) fi +AC_CHECK_FUNC(memmem, [ + AC_CACHE_CHECK(for broken memmem, rb_cv_broken_memmem, [ + AC_TRY_RUN([ +#include <string.h> + +int +main() +{ + char *str = "hogefugafoobar"; + char *rs = "foo"; + char *empty = ""; + char *p; + + p = memmem(str, strlen(str), rs, strlen(rs)); + if (p == str+8) { + p = memmem(str, strlen(str), empty, strlen(empty)); + if (p == str) + return 0; + else + return 1; + } + else { + return 1; + } +} + ], + rb_cv_broken_memmem=no, + rb_cv_broken_memmem=yes, + rb_cv_broken_memmem=yes) + ]) + if test "$rb_cv_broken_memmem" = no; then + AC_DEFINE(HAVE_MEMMEM, 1) + fi +]) + + CPPFLAGS="$CPPFLAGS "'$(DEFS)' test -z "$CPPFLAGS" || CPPFLAGS="$CPPFLAGS "; CPPFLAGS="$CPPFLAGS"'${cppflags}' if test -n "${cflags+set}"; then |