diff --git a/ChangeLog b/ChangeLog
index 8f3db47..71d36cf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-03-14 09:31  marc
+
+	* ChangeLog, ax_init_standard_project.m4, bootstrap.sh,
+	  src/libpcscxx.pc.in: add compile dependencies
+
 2015-03-13 16:30  marc
 
 	* ax_check_qt.m4, ax_init_standard_project.m4, bootstrap.sh,
diff --git a/ax_check_qt.m4 b/ax_check_qt.m4
index 4567828..e3d7377 100644
--- a/ax_check_qt.m4
+++ b/ax_check_qt.m4
@@ -62,16 +62,35 @@ AC_DEFUN([AX_CXX_QT_TOOLS], [
   AX_CXX_QT_TOOL(LRELEASE, lrelease)
 ])
 
-AC_DEFUN([AX_CXX_CHECK_QT], [
+AC_DEFUN([AX_CHECK_VALID_FLAG], [
+  AC_MSG_CHECKING([m4_default([$2], [for valid flag in "$1"])])
+  save_cxxflags="$CXXFLAGS"
+  newflag="no"
+  for test_flag in $1; do
+    CXXFLAGS+=" ${test_flag}"
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
+      newflag="$test_flag"
+      AM_CXXFLAGS+=" ${test_flag}"
+      CXXFLAGS="$save_cxxflags"
+      break;
+    ])
+    CXXFLAGS="$save_cxxflags"
+  done
+  AC_SUBST(AM_CXXFLAGS)
+  AC_MSG_RESULT([$newflag])
+])
+
+AC_DEFUN([AX_CHECK_QT], [
   qt_modules="$2"
   AX_CXX_QT_TOOLS
   HAVE_$1=0
-  PKG_CHECK_MODULES([$1], [${qt_modules//Qt/Qt5}], [
+  PKG_PROG_PKG_CONFIG
+  PKG_CHECK_MODULES([$1]5, [${qt_modules//Qt/Qt5}], [
     HAVE_$1=1
     AC_DEFINE([HAVE_$1])
-    AM_CPPFLAGS+=" ${$1_CFLAGS}"
-    AM_CXXFLAGS+=" ${$1_CFLAGS}"
-    LIBS+=" ${$1_LIBS}"
+    AM_CPPFLAGS+=" ${[$1]5_CFLAGS}"
+    AM_CXXFLAGS+=" ${[$1]5_CFLAGS}"
+    LIBS+=" ${[$1]5_LIBS}"
   ], [
     PKG_CHECK_MODULES([$1], [${qt_modules}], [
       HAVE_$1=1
@@ -82,10 +101,11 @@ AC_DEFUN([AX_CXX_CHECK_QT], [
     ], [HAVE_$1=0])
   ])
   AM_CONDITIONAL(HAVE_$1, test $HAVE_$1 -eq 1)
+  AX_CHECK_VALID_FLAG([-fPIC -fPIE], [position independent code flag])
   AC_SUBST(AM_CPPFLAGS)
   AC_SUBST(AM_CXXFLAGS)
   AX_ADDITIONAL_QT_RULES_HACK='
-%_ui.hxx: %.ui
+ui_%.hxx: %.ui
 	${UIC} -o [$][@] $<
 
 moc_%.cxx: %.hxx
@@ -95,3 +115,10 @@ qrc_%.cxx: %.qrc
 	${RCC} -o [$][@] $<'
   AC_SUBST(AX_ADDITIONAL_QT_RULES_HACK)
 ])
+
+AC_DEFUN([AX_REQUIRE_QT], [
+  AX_CHECK_QT([$1], [$2])
+  if ! test "$HAVE_$1" -eq 1; then
+     AC_MSG_ERROR([Required Qt modules not found: $2])
+  fi
+])
\ No newline at end of file
diff --git a/ax_init_standard_project.m4 b/ax_init_standard_project.m4
index c4e5b26..c1a4b06 100644
--- a/ax_init_standard_project.m4
+++ b/ax_init_standard_project.m4
@@ -251,3 +251,16 @@ uninstall-documentation:
 #### End: $0
 EOF
 ])
+
+AC_DEFUN([AX_PKG_REQUIRE], [
+  PKG_PROG_PKG_CONFIG
+  PKG_CHECK_MODULES([$1], [$1], [
+    AM_CPPFLAGS+=" ${$1_CFLAGS}"
+    AM_CXXFLAGS+=" ${$1_CFLAGS}"
+    LIBS+=" ${$1_LIBS}"
+  ], [
+    AC_MSG_ERROR([Required package $1 not found])
+  ])
+  AC_SUBST(AM_CPPFLAGS)
+  AC_SUBST(AM_CXXFLAGS)
+])
diff --git a/bootstrap.sh b/bootstrap.sh
index 82addc5..f961972 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -282,8 +282,8 @@ if ! test -f makefile.am; then
     echo "${HEADER}SUBDIRS =${SUBDIRS}" | to makefile.am
 fi
 to --condition AX_USE_LIBTOOL src/${PACKAGE_NAME}.pc.in <<EOF
-${HEADER}prefix=@PACKAGE_NAME@
-exec_prefix=${prefix}
+${HEADER}prefix=@prefix@
+exec_prefix=@exec_prefix@
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 
diff --git a/configure.ac b/configure.ac
index d457d1b..b306ca9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,9 +18,9 @@ AX_USE_RPM_PACKAGING
 AX_BUILD_EXAMPLES
 
 # qt features
-AX_CXX_CHECK_QT([QTGUI], [QtCore QtGui])
-AX_CXX_CHECK_QT([QTWIDGETS], [QtWidgets]) # optional, needed only for qt5
-AX_CXX_CHECK_QT([QTNETWORK], [QtNetwork])
+AX_CHECK_QT([QTGUI], [QtCore QtGui])
+AX_CHECK_QT([QTWIDGETS], [QtWidgets]) # optional, needed only for qt5
+AX_CHECK_QT([QTNETWORK], [QtNetwork])
 
 # programs
 #PKG_PROG_PKG_CONFIG
diff --git a/src/libpcscxx.pc.in b/src/libpcscxx.pc.in
index 9e2a68a..2f5848c 100644
--- a/src/libpcscxx.pc.in
+++ b/src/libpcscxx.pc.in
@@ -1,5 +1,5 @@
-prefix=@PACKAGE_NAME@
-exec_prefix=${prefix}
+prefix=@prefix@
+exec_prefix=@exec_prefix@
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include