More makefile glitches

Doc/release-notes

@@ -5,10 +5,11 @@ New in development version:
   * XDM now works also for USPP and norm-conserving PP
 
 Problems fixed in development version (+ = in qe-6.3-backports as well) :
-  * Atomic occupancies for DFT+U were not correctly written by CP after 
+  + A few more "make install" and "make -jN" glitches
+  + Atomic occupancies for DFT+U were not correctly written by CP after 
     switch to new format, due to a mismatch in their definition
-  * Phonons with option "nosym" wasn't working
-  * Option "noinv" wasn't read from new xml file
+  + Phonons with option "nosym" wasn't working
+  + Option "noinv" wasn't read from new xml file
   * Variable-cell optimization with hybrid functionals wasn't working due
     to missing re-initialization (it also crashed during the final scf step)
   + Printout of wall time was sometimes incorrect (courtesy Daniel Pinkal)

Makefile

@@ -282,12 +282,12 @@ links : bindir
 	)
 
 #########################################################
-# 'make install' works based on --with-prefix
-# - If the final directory does not exists it creates it
+# 'make install' works with "configure --prefix=PREFIX"
+# - If the PREFIX directory does not exists it creates it
 #########################################################
 
 install : 
-	@if test -d bin ; then mkdir -p $(PREFIX)/bin ; \
+	@if ! test -d $(PREFIX)/bin ; then mkdir -p $(PREFIX)/bin ; \
 	for x in `find * ! -path "test-suite/*" -name *.x -type f` ; do \
 		cp $$x $(PREFIX)/bin/ ; done ; \
 	fi

install/make.inc.in

@@ -186,5 +186,5 @@ QELIBS         = $(CUDA_LIBS) $(SCALAPACK_LIBS) $(LAPACK_LIBS) $(FOX_LIB) $(FFT_
 # wget or curl - useful to download from network
 WGET = @wget@
 
-# Install directory - not currently used
+# Install directory - "make install" copies *.x executables there
 PREFIX = @prefix@