Merge branch 'dev-relax-dyn-cc-wrappers' into 'master'

relax dynamic linker check in compiler wrappers

See merge request !51

darshan-runtime/darshan-gen-cc.pl.in

@@ -265,7 +265,8 @@ print OUTPUT<<"EOF";
     rc_mpi=\$?
 
     # did the link options produce a dynamic executable?
-    ldd \$binfile >& /dev/null
+    # we look for dynamic MPI_Init symbol to confirm
+    nm --dynamic \$binfile | grep MPI_Init >& /dev/null
     rc_dyn=\$?
 
     rm \$tmpfile >& /dev/null

darshan-runtime/darshan-gen-cxx.pl.in

@@ -266,7 +266,8 @@ print OUTPUT<<"EOF";
     rc_mpi=\$?
 
     # did the link options produce a dynamic executable?
-    ldd \$binfile >& /dev/null
+    # we look for dynamic MPI::Init symbol to confirm, but we have to be wary of mangling...
+    nm --demangle --dynamic \$binfile | grep "MPI::Init" >& /dev/null
     rc_dyn=\$?
 
     CXXMPICH=-lmpichcxx

darshan-runtime/darshan-gen-fortran.pl.in

@@ -274,7 +274,8 @@ print OUTPUT<<"EOF";
     rc_mpi=\$?
 
     # did the link options produce a dynamic executable?
-    ldd \$binfile >& /dev/null
+    # we look for dynamic MPI_Init symbol to confirm, but we have to be wary of mangling...
+    nm --dynamic \$binfile | grep mpi_init >& /dev/null
     rc_dyn=\$?
 
     # find appropriate fortran library name for profiling