fix pdfium finder for git master pdfium

and our new pdfium builder

m4/pdfium.m4

@@ -15,22 +15,6 @@ AC_REQUIRE([AC_PATH_XTRA])
 ZLIB_INCLUDES=""
 ZLIB_LIBS=""
 
-# PDFium has a set of object archives that must be linked firectly into your
-# app, and a couple of true libraries. The objects must be linked in this
-# order.
-pdfium_objects="\
-	libpdfium.a \
-	libchrome_zlib.a \
-	libgmock_main.a \
-	libicui18n.a \
-	libicuuc.a \
-	libjpeg.a \
-	libminizip.a \
-	libzlib_x86_simd.a \
-	libsimd.a \
-	libsimd_asm.a \
-	libyasm_utils.a"
-
 AC_ARG_WITH(pdfium, 
   AS_HELP_STRING([--without-pdfium], [build without pdfium (default: test)]))
 # Treat --without-pdfium like --without-pdfium-includes 
@@ -69,23 +53,16 @@ if test "$PDFIUM_INCLUDES" = ""; then
 fi
 
 # Now for the libraries ... if there's nothing set, try $PREFIX/lib 
-# we must link with g++ for pdfium
 if test "$PDFIUM_LIBS" = ""; then
   pdfium_save_LIBS="$LIBS"
   pdfium_save_CPPFLAGS="$CPPFLAGS"
 
-  LIBS=""
-  for i in $pdfium_objects; do
-    LIBS="$LIBS $prefix/lib/pdfium-obj/$i"
-  done
-  LIBS="$LIBS -L$prefix/lib -lm -lpthread"
-  CPPFLAGS="$PDFIUM_INCLUDES $CPPFLAGS -std=c++11"
+  LIBS="-L$prefix/lib -lpdfium -lc++ -licuuc $LIBS"
+  CPPFLAGS="$PDFIUM_INCLUDES $CPPFLAGS"
 
-  AC_LANG(C++)
-  AC_LINK_IFELSE(
-    [AC_LANG_PROGRAM([#include <fpdfview.h>],
-      [FPDF_DOCUMENT doc; doc = FPDF_LoadDocument("", "")])],
-    [PDFIUM_LIBS="${prefix}/lib"],
+  AC_TRY_LINK([#include <fpdfview.h>],
+     [FPDF_DOCUMENT doc; doc = FPDF_LoadDocument("", "")],
+    [PDFIUM_LIBS="-L${prefix}/lib -lpdfium -lc++ -licuuc"],
     [PDFIUM_LIBS=no])
 
   LIBS="$pdfium_save_LIBS"