title: What is wrong with this make file? (The error is: make *** No rule to make target)
body: <p>I'm trying to compile and run XROTOR on my Windows 7 laptop. I have downloaded Cygwin, as well as XROTOR (<a href="http://web.mit.edu/drela/Public/web/xrotor/" rel="nofollow noreferrer">http://web.mit.edu/drela/Public/web/xrotor/</a>)</p>
  
  <p>From the README...</p>
  
  <pre><code>Build Sequence
  --------------
  To install, first build the plot library in  ./plotlib  ...
  
   % cd plotlib
   % make libPlt.a
  
  Then build the programs in  ./bin  ...
  
   % make xrotor
   % make jplot
  </code></pre>
  
  <p>When I go to "make libPlt.a" I get an error that says:</p>
  
  <p>make: * ** No rule to make target: 'libPlt.a'. Stop.</p>
  
  <p>What silly mistake am I making?</p>
  
  <p>Here's the make file I believe:</p>
  
  <pre><code>#=======================================#
  # Makefile options for Xplot11 library  #
  #   Set up or select a set of compile   #
  #   options for your system             # 
  #=======================================#
  
  
  # Set library name 
  PLTLIB = libPlt_gDP.a
  
  # Some fortrans need trailing underscores in C interface symbols (see Xwin.c)
  # This should work for most of the "unix" fortran compilers
  DEFINE = -DUNDERSCORE
  
  FC = gfortran
  CC  = gcc
  DP = -fdefault-real-8
  
  FFLAGS  = -O2 $(DP)
  CFLAGS  = -O2 $(DEFINE)
  AR = ar r
  RANLIB = ranlib 
  LINKLIB = -L/usr/X11R6/lib -lX11 
  </code></pre>
  
  <p>Actually! I think this is the makefile (it's called makefile so I'm assuming as much)</p>
  
  <pre><code>#***********************************************************************
  #    Module:  Makefile
  # 
  #    Copyright (C) 1996 Harold Youngren, Mark Drela 
  # 
  #    This library is free software; you can redistribute it and/or
  #    modify it under the terms of the GNU Library General Public
  #    License as published by the Free Software Foundation; either
  #    version 2 of the License, or (at your option) any later version.
  #
  #    This library is distributed in the hope that it will be useful,
  #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  #    Library General Public License for more details.
  #
  #    You should have received a copy of the GNU Library General Public
  #    License along with this library; if not, write to the Free
  #    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  # 
  #    Report problems to:    guppy@maine.com 
  #                        or drela@mit.edu  
  #***********************************************************************
  
  
  #================================#
  # Makefile for Xplot11 library   #
  #  edit the config.make file to  #
  #  set specific options for your #
  #  system                        #
  #================================#
  
  # Point to your install directory
  #INSTALLDIR = /home/codes/bin
  #INSTALLDIR = /usr/local/lib
  INSTALLDIR = .
  
  # Use these to set default library name (overridden in config.make file) 
  PLTLIB = libPlt.a
  #PLTLIB = libPltDP.a
  
  
  ###========================================================
  ###  Basic plot library object files
  OBJ     = plt_base.o plt_font.o plt_util.o plt_color.o \
            set_subs.o gw_subs.o ps_subs.o Xwin.o
  OBJMISC =
  OBJ3D   =
  OBJOLD  =
  
  ###--------------------------------------------------------
  ###  Uncomment to add the old plot compatibility routines
  OBJOLD  = plt_old.o
  
  ###--------------------------------------------------------
  ###  Uncomment to add the primitive 3D-view routines
  OBJ3D  = plt_3D.o
  
  ###--------------------------------------------------------
  ###  Uncomment for f77 compiler w/o AND() and RSHIFT/LSHIFT functions.
  ###   This adds some functions to duplicate these using IAND and ISHFT
  ###   which often appear in these offending fortran's libraries.
  ###   The compilers that this has affected include:
  ###      HPUX f77
  ###      Absoft f77 on Linux
  ###
  #OBJMISC = util-ops.o
  
  
  ###-------------------------------------------------------------------------
  ### Set compiler, compiler flags, name of output object library
  include ./config.make
  
  
  ###-------------------------------------------------------------------------
  ### Basic make targets - build library, test programs
  
  $(PLTLIB):  $(OBJ) $(OBJOLD) $(OBJ3D) $(OBJMISC)
      $(AR)     $(PLTLIB) $(OBJ) $(OBJOLD) $(OBJ3D) $(OBJMISC)
      $(RANLIB) $(PLTLIB)
  
  test:  $(PLTLIB)
      (cd examples; make test)
  
  
  ###-------------------------------------------------------------------------
  ### Utility functions - install the library, clean the directory
  
  install:  $(PLTLIB)
      mv $(PLTLIB) $(INSTALLDIR)
      $(RANLIB)   $(INSTALLDIR)/$(PLTLIB)
  
  clean:
      -/bin/rm $(OBJ) $(OBJOLD) $(OBJ3D) $(OBJMISC)
      -/bin/rm $(PLTLIB)
      -/bin/rm plot*.ps
      (cd examples; make clean)
  
  
  ###-------------------------------------------------------------------------
  ### compile plot package routines
  
  plt_base.o: plt_base.f pltlib.inc
      $(FC) -c $(FFLAGS)  plt_base.f
  
  plt_color.o: plt_color.f  pltlib.inc
      $(FC) -c $(FFLAGS)  plt_color.f
  
  plt_font.o: plt_font.f CHAR.INC SLAN.INC MATH.INC SYMB.INC
      $(FC) -c $(FFLAGS)  plt_font.f
  
  plt_util.o: plt_util.f
      $(FC) -c $(FFLAGS)  plt_util.f
  
  plt_3D.o: plt_3D.f
      $(FC) -c $(FFLAGS)  plt_3D.f
  
  plt_old.o: plt_old.f pltlib.inc
      $(FC) -c $(FFLAGS)  plt_old.f
  
  set_subs.o: set_subs.f  pltlib.inc
      $(FC) -c $(FFLAGS)  set_subs.f
  
  gw_subs.o: gw_subs.f  pltlib.inc
      $(FC) -c $(FFLAGS)  gw_subs.f
  
  ps_subs.o: ps_subs.f  pltlib.inc
      $(FC) -c $(FFLAGS)  ps_subs.f
  
  util-ops.o: util-ops.f 
      $(FC) -c $(FFLAGS)  util-ops.f
  
  Xwin.o: Xwin.c
      $(CC) -c $(CFLAGS) Xwin.c
  
  
  ### May need to specify these on a brain-dead make system
  #.f.o:  $(FC) -c $(FFLAGS) $&lt;
  #.c.o:  $(CC) -c $(CFLAGS) $&lt;
  </code></pre>
  
  <p>If you need any more information, just ask!</p>
  
  <p>UPDATE: I typed in "make libPLT_gDP.a"</p>
  
  <p><img src="https://i.stack.imgur.com/fJoSB.jpg" alt="enter image description here"></p>