Pass srcdir for the parset

src/Makefile.am

@@ -24,6 +24,8 @@ run-one-body-sample-gdb: one-body-sample
 
 one_body_sample_SOURCES = \
 	one-body-sample.cc
+one_body_sample_CPPFLAGS = \
+	$(AM_CPPFLAGS) -Dsrcdir=\"$(srcdir)\"
 
 test_gradient_method_SOURCES = \
 	test-gradient-method.cc

src/one-body-sample.cc

@@ -2,6 +2,10 @@
 #include "config.h"
 #endif
 
+#ifndef srcdir
+#error srcdir unset
+#endif
+
 #ifdef HAVE_IPOPT
 #undef HAVE_IPOPT
 #endif
@@ -175,7 +179,7 @@ void assemble_nonlinearity(
 int main(int argc, char *argv[]) {
   try {
     Dune::ParameterTree parset;
-    Dune::ParameterTreeParser::readINITree("../../src/one-body-sample.parset",
+    Dune::ParameterTreeParser::readINITree(srcdir "/one-body-sample.parset",
                                            parset); // FIXME
     Dune::ParameterTreeParser::readOptions(argc, argv, parset);