Add dlib as a submodule, and statically compile it into the extension.

config.m4

@@ -10,46 +10,27 @@ PHP_ARG_WITH(pdlib, for pdlib support,
 dnl Make sure that the comment is aligned:
 [  --with-pdlib             Include pdlib support])
 
-if test "$PHP_PDLIB" != "no"; then
-  PHP_REQUIRE_CXX()
-  PHP_ADD_LIBRARY(stdc++, 1, PDLIB_SHARED_LIBADD)
-  PHP_SUBST(PDLIB_SHARED_LIBADD)
+PHP_REQUIRE_CXX()
+PHP_ADD_LIBRARY(stdc++, 1, PDLIB_SHARED_LIBADD)
+PHP_ADD_LIBRARY(cblas, 1, PDLIB_SHARED_LIBADD)
+PHP_ADD_LIBRARY(lapack, 1, PDLIB_SHARED_LIBADD)
+PHP_SUBST(PDLIB_SHARED_LIBADD)
 
-  pdlib_src_files="pdlib.cc \
-  src/chinese_whispers.cc \
-  src/face_detection.cc \
-  src/face_landmark_detection.cc \
-  src/face_recognition.cc \
-  src/cnn_face_detection.cc
-  src/vector.cc"
+PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/dlib)
 
-  AC_MSG_CHECKING(for pkg-config)
-  AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-  if test -x "$PKG_CONFIG"; then
-    AC_MSG_RESULT(found)
-    AC_MSG_CHECKING(for dlib-1)
-    if $PKG_CONFIG --exists dlib-1; then
-      if $PKG_CONFIG dlib-1 --atleast-version 19.00; then
-        LIBDLIB_CFLAGS=`$PKG_CONFIG dlib-1 --cflags`
-        LIBDLIB_LIBDIR=`$PKG_CONFIG dlib-1 --libs`
-        LIBDLIB_VERSON=`$PKG_CONFIG dlib-1 --modversion`
-        AC_MSG_RESULT(from pkgconfig: dlib version $LIBDLIB_VERSON)
-      else
-        AC_MSG_ERROR(system dlib is too old: version 19.00 required)
-      fi
-    else
-      AC_MSG_ERROR(dlib-1 not found)
-    fi
-  else
-     AC_MSG_ERROR(pkg-config not found)
-  fi
+pdlib_src_files="pdlib.cc \
+dlib/dlib/all/source.cpp \
+src/chinese_whispers.cc \
+src/face_detection.cc \
+src/face_landmark_detection.cc \
+src/face_recognition.cc \
+src/cnn_face_detection.cc \
+src/vector.cc"
 
-  PHP_EVAL_LIBLINE($LIBDLIB_LIBDIR, PDLIB_SHARED_LIBADD)
-  PHP_EVAL_INCLINE($LIBDLIB_CFLAGS)
+dnl using C++11
+CXXFLAGS="-g -O3 -march=native"
 
-  dnl using C++11
-  PHP_NEW_EXTENSION(pdlib, $pdlib_src_files, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -std=c++11, cxx)
-fi
+PHP_NEW_EXTENSION(pdlib, $pdlib_src_files, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -DDLIB_NO_GUI_SUPPORT=1 -DDLIB_USE_BLAS -DDLIB_USE_LAPACK, cxx)
 
 AC_CONFIG_COMMANDS_POST([
   echo ""