[cpp] add the build system stuff for iconv, mandatory for cpp
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 023229c..18b6a8e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,6 +62,12 @@
     set(CAIRO_REQ "cairo")
   endif(CAIRO_FOUND)
 endif(GLIB_FOUND)
+if(ENABLE_CPP)
+  macro_optional_find_package(Iconv)
+  set(ENABLE_CPP ${ICONV_FOUND})
+  set(HAVE_ICONV ${ICONV_FOUND})
+  set(ICONV_CONST ${ICONV_SECOND_ARGUMENT_IS_CONST})
+endif(ENABLE_CPP)
 if(ENABLE_ZLIB)
   find_package(ZLIB)
   if(ZLIB_FOUND)
diff --git a/Makefile.am b/Makefile.am
index 6d279ad..aedf60f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -73,6 +73,7 @@
 	cmake/modules/FindCairo.cmake				\
 	cmake/modules/FindFontconfig.cmake			\
 	cmake/modules/FindGTK.cmake				\
+	cmake/modules/FindIconv.cmake				\
 	cmake/modules/FindLCMS.cmake				\
 	cmake/modules/FindQt3.cmake				\
 	cmake/modules/FindQt4.cmake				\
diff --git a/cmake/modules/FindIconv.cmake b/cmake/modules/FindIconv.cmake
new file mode 100644
index 0000000..ce40ab2
--- /dev/null
+++ b/cmake/modules/FindIconv.cmake
@@ -0,0 +1,57 @@
+# - Try to find Iconv 
+# Once done this will define 
+# 
+#  ICONV_FOUND - system has Iconv 
+#  ICONV_INCLUDE_DIR - the Iconv include directory 
+#  ICONV_LIBRARIES - Link these to use Iconv 
+#  ICONV_SECOND_ARGUMENT_IS_CONST - the second argument for iconv() is const
+# 
+include(CheckCXXSourceCompiles)
+
+IF (ICONV_INCLUDE_DIR AND ICONV_LIBRARIES)
+  # Already in cache, be silent
+  SET(ICONV_FIND_QUIETLY TRUE)
+ENDIF (ICONV_INCLUDE_DIR AND ICONV_LIBRARIES)
+
+FIND_PATH(ICONV_INCLUDE_DIR iconv.h) 
+ 
+FIND_LIBRARY(ICONV_LIBRARIES NAMES iconv libiconv libiconv-2 c)
+ 
+IF(ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) 
+   SET(ICONV_FOUND TRUE) 
+ENDIF(ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) 
+
+set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
+set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARIES})
+IF(ICONV_FOUND)
+  check_cxx_source_compiles("
+  #include <iconv.h>
+  int main(){
+    iconv_t conv = 0;
+    const char* in = 0;
+    size_t ilen = 0;
+    char* out = 0;
+    size_t olen = 0;
+    iconv(conv, &in, &ilen, &out, &olen);
+    return 0;
+  }
+" ICONV_SECOND_ARGUMENT_IS_CONST )
+ENDIF(ICONV_FOUND)
+set(CMAKE_REQUIRED_INCLUDES)
+set(CMAKE_REQUIRED_LIBRARIES)
+
+IF(ICONV_FOUND) 
+  IF(NOT ICONV_FIND_QUIETLY) 
+    MESSAGE(STATUS "Found Iconv: ${ICONV_LIBRARIES}") 
+  ENDIF(NOT ICONV_FIND_QUIETLY) 
+ELSE(ICONV_FOUND) 
+  IF(Iconv_FIND_REQUIRED) 
+    MESSAGE(FATAL_ERROR "Could not find Iconv") 
+  ENDIF(Iconv_FIND_REQUIRED) 
+ENDIF(ICONV_FOUND) 
+
+MARK_AS_ADVANCED(
+  ICONV_INCLUDE_DIR
+  ICONV_LIBRARIES
+  ICONV_SECOND_ARGUMENT_IS_CONST
+)
diff --git a/config.h.cmake b/config.h.cmake
index 7b57de0..253e730 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -36,6 +36,9 @@
 /* Defines if gettimeofday is available on your system */
 #cmakedefine HAVE_GETTIMEOFDAY 1
 
+/* Define if you have the iconv() function and it works. */
+#cmakedefine HAVE_ICONV 1
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #cmakedefine HAVE_INTTYPES_H 1
 
@@ -90,6 +93,9 @@
 /* Define to 1 if you have the <zlib.h> header file. */
 #cmakedefine HAVE_ZLIB_H 1
 
+/* Define as const if the declaration of iconv() needs const. */
+#cmakedefine ICONV_CONST 1
+
 /* Define to 1 if gdk was found */
 #cmakedefine POPPLER_WITH_GDK 1
 
diff --git a/configure.ac b/configure.ac
index a51eede..102a0b2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -453,6 +453,12 @@
                              [Don't compile poppler cpp wrapper.]),
               enable_poppler_cpp=$enableval,
               enable_poppler_cpp="yes")
+if test x$enable_poppler_cpp = xyes; then
+  AM_ICONV()
+  if test x$am_func_iconv != xyes; then
+    enable_poppler_cpp=no
+  fi
+fi
 
 AM_CONDITIONAL(BUILD_POPPLER_CPP, test "x$enable_poppler_cpp" = "xyes")
 
diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index b5880de..4c1d7c4 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -22,7 +22,7 @@
 
 add_library(poppler-cpp SHARED ${poppler_cpp_SRCS})
 set_target_properties(poppler-cpp PROPERTIES VERSION 0.1.0 SOVERSION 0)
-target_link_libraries(poppler-cpp poppler)
+target_link_libraries(poppler-cpp poppler ${ICONV_LIBRARIES})
 if(MSVC)
 target_link_libraries(poppler-cpp ${poppler_LIBS})
 endif(MSVC)
diff --git a/cpp/Makefile.am b/cpp/Makefile.am
index 4fb1874..2e3f56d 100644
--- a/cpp/Makefile.am
+++ b/cpp/Makefile.am
@@ -31,6 +31,7 @@
 	poppler-version.cpp
 
 libpoppler_cpp_la_LIBADD = 			\
-	$(top_builddir)/poppler/libpoppler.la
+	$(top_builddir)/poppler/libpoppler.la	\
+	$(LIBICONV)
 
 libpoppler_cpp_la_LDFLAGS = -version-info 1:0:1 @create_shared_lib@
diff --git a/m4/iconv.m4 b/m4/iconv.m4
new file mode 100644
index 0000000..b2156eb
--- /dev/null
+++ b/m4/iconv.m4
@@ -0,0 +1,180 @@
+# iconv.m4 serial AM6 (gettext-0.17)
+dnl Copyright (C) 2000-2002, 2007 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
+[
+  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
+  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+  dnl AC_REQUIRE([AC_LIB_RPATH])
+
+  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
+  dnl accordingly.
+  AC_LIB_LINKFLAGS_BODY([iconv])
+])
+
+AC_DEFUN([AM_ICONV_LINK],
+[
+  dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
+  dnl those with the standalone portable GNU libiconv installed).
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
+  dnl accordingly.
+  AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
+
+  dnl Add $INCICONV to CPPFLAGS before performing the following checks,
+  dnl because if the user has installed libiconv and not disabled its use
+  dnl via --without-libiconv-prefix, he wants to use it. The first
+  dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
+  am_save_CPPFLAGS="$CPPFLAGS"
+  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
+
+  AC_CACHE_CHECK([for iconv], am_cv_func_iconv, [
+    am_cv_func_iconv="no, consider installing GNU libiconv"
+    am_cv_lib_iconv=no
+    AC_TRY_LINK([#include <stdlib.h>
+#include <iconv.h>],
+      [iconv_t cd = iconv_open("","");
+       iconv(cd,NULL,NULL,NULL,NULL);
+       iconv_close(cd);],
+      am_cv_func_iconv=yes)
+    if test "$am_cv_func_iconv" != yes; then
+      am_save_LIBS="$LIBS"
+      LIBS="$LIBS $LIBICONV"
+      AC_TRY_LINK([#include <stdlib.h>
+#include <iconv.h>],
+        [iconv_t cd = iconv_open("","");
+         iconv(cd,NULL,NULL,NULL,NULL);
+         iconv_close(cd);],
+        am_cv_lib_iconv=yes
+        am_cv_func_iconv=yes)
+      LIBS="$am_save_LIBS"
+    fi
+  ])
+  if test "$am_cv_func_iconv" = yes; then
+    AC_CACHE_CHECK([for working iconv], am_cv_func_iconv_works, [
+      dnl This tests against bugs in AIX 5.1 and HP-UX 11.11.
+      am_save_LIBS="$LIBS"
+      if test $am_cv_lib_iconv = yes; then
+        LIBS="$LIBS $LIBICONV"
+      fi
+      AC_TRY_RUN([
+#include <iconv.h>
+#include <string.h>
+int main ()
+{
+  /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
+     returns.  */
+  {
+    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
+    if (cd_utf8_to_88591 != (iconv_t)(-1))
+      {
+        static const char input[] = "\342\202\254"; /* EURO SIGN */
+        char buf[10];
+        const char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_utf8_to_88591,
+                            (char **) &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if (res == 0)
+          return 1;
+      }
+  }
+#if 0 /* This bug could be worked around by the caller.  */
+  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
+  {
+    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
+    if (cd_88591_to_utf8 != (iconv_t)(-1))
+      {
+        static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
+        char buf[50];
+        const char *inptr = input;
+        size_t inbytesleft = strlen (input);
+        char *outptr = buf;
+        size_t outbytesleft = sizeof (buf);
+        size_t res = iconv (cd_88591_to_utf8,
+                            (char **) &inptr, &inbytesleft,
+                            &outptr, &outbytesleft);
+        if ((int)res > 0)
+          return 1;
+      }
+  }
+#endif
+  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
+     provided.  */
+  if (/* Try standardized names.  */
+      iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
+      /* Try IRIX, OSF/1 names.  */
+      && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
+      /* Try AIX names.  */
+      && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
+      /* Try HP-UX names.  */
+      && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
+    return 1;
+  return 0;
+}], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
+        [case "$host_os" in
+           aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
+           *)            am_cv_func_iconv_works="guessing yes" ;;
+         esac])
+      LIBS="$am_save_LIBS"
+    ])
+    case "$am_cv_func_iconv_works" in
+      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
+      *)   am_func_iconv=yes ;;
+    esac
+  else
+    am_func_iconv=no am_cv_lib_iconv=no
+  fi
+  if test "$am_func_iconv" = yes; then
+    AC_DEFINE(HAVE_ICONV, 1,
+      [Define if you have the iconv() function and it works.])
+  fi
+  if test "$am_cv_lib_iconv" = yes; then
+    AC_MSG_CHECKING([how to link with libiconv])
+    AC_MSG_RESULT([$LIBICONV])
+  else
+    dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
+    dnl either.
+    CPPFLAGS="$am_save_CPPFLAGS"
+    LIBICONV=
+    LTLIBICONV=
+  fi
+  AC_SUBST(LIBICONV)
+  AC_SUBST(LTLIBICONV)
+])
+
+AC_DEFUN([AM_ICONV],
+[
+  AM_ICONV_LINK
+  if test "$am_cv_func_iconv" = yes; then
+    AC_MSG_CHECKING([for iconv declaration])
+    AC_CACHE_VAL(am_cv_proto_iconv, [
+      AC_TRY_COMPILE([
+#include <stdlib.h>
+#include <iconv.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+#if defined(__STDC__) || defined(__cplusplus)
+size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
+#else
+size_t iconv();
+#endif
+], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
+      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
+    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
+    AC_MSG_RESULT([$]{ac_t:-
+         }[$]am_cv_proto_iconv)
+    AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
+      [Define as const if the declaration of iconv() needs const.])
+  fi
+])