[CoreText] Add basic Core Text backend for comparison with our native shaping
Does not attempt to handle clusters in a Uniscribe- or HarfBuzz-compatible way;
just returns the original string indexes that CT maintains. These may even be
out-of-order in the case of reordrant glyphs.
diff --git a/configure.ac b/configure.ac
index cbabf83..030b04a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -186,6 +186,18 @@
dnl ===========================================================================
+AC_CHECK_HEADERS(ApplicationServices/ApplicationServices.h, have_coretext=true, have_coretext=false)
+if $have_coretext; then
+ CORETEXT_CFLAGS=
+ CORETEXT_LIBS=
+ AC_SUBST(CORETEXT_CFLAGS)
+ AC_SUBST(CORETEXT_LIBS)
+ AC_DEFINE(HAVE_CORETEXT, 1, [Have Core Text backend])
+fi
+AM_CONDITIONAL(HAVE_CORETEXT, $have_coretext)
+
+dnl ===========================================================================
+
AC_CACHE_CHECK([for Intel atomic primitives], hb_cv_have_intel_atomic_primitives, [
hb_cv_have_intel_atomic_primitives=false
AC_TRY_LINK([
