Update, prepare for ngspice-44

INSTALL

@@ -1,12 +1,9 @@
 Ngspice installation instructions
 =================================
 
-Important notice: If you upgrade from ngspice-38 or older
+Important notice: If you upgrade, it
-there there is an update required for the XSPICE code 
-models (analog.cm etc.). Therefore it
 is not sufficient to only re-make the main executable,
-you will have to compile and install the code models as well,
+you will have to compile and install the code models as well.
-e.g. with --enable-xspice.
 
 Table of contents
 
@@ -87,14 +84,14 @@ This file describes the procedures to install ngspice from sources.
  For compiling ngspice as a shared library, see section 1.4.
 
 
-1.2 Install from tarball (e.g. ngspice-43.tar.gz)
+1.2 Install from tarball (e.g. ngspice-44.tar.gz)
 
  This covers installation from a release distribution (for example
- ngspice-43.tar.gz, the so called tar ball).
+ ngspice-44.tar.gz, the so called tar ball).
 
  After downloading the tar ball to a local directory, unpack it by command:
 
- $ tar -zxvf ngspice-43.tar.gz
+ $ tar -zxvf ngspice-44.tar.gz
 
  Now change directories in to the top-level source directory (where this
  INSTALL file can be found).
@@ -185,8 +182,11 @@ This file describes the procedures to install ngspice from sources.
 
 1.4 ngspice as a shared library
 
- The relevant configure options for the ngspice shared library are:
+ The relevant configure option for the ngspice shared library is:
- $ --with-ngshared --enable-cider
+ --with-ngshared 
+ (used instead of --with-x)
+ --enable-cider
+ may be selected optionally.
 
  Typically the two aliases libngspice.so, libngspice.so.0 and the compiled
  library libngspice.so.0.0.1 are made. The install locations depend on
@@ -236,7 +236,7 @@ This file describes the procedures to install ngspice from sources.
         device models like BSOMBULK or BSIM_CMG.
         
 
-(the following have to be selected to become available)
+(the following have to be selected explicitely to become available)
 
  --enable-cider
         Cider is a mixed-level simulator that couples Spice3 and DSIM
@@ -490,7 +490,10 @@ This file describes the procedures to install ngspice from sources.
  automake, libtool, FLEX and BISON, all available with pacman in MSYSS2).
  Some links are given below which describe the procedures.
  
-     Installing from the tarball, e.g. ngspice-43.tar.gz, is simple: After
+ Unfortunately compiling with MINGW is slow. Compiling with Visual Studio
+ may be more than 10 times faster!
+
+     Installing from the tarball, e.g. ngspice-44.tar.gz, is simple: After
  expanding, you may just run ./compile_min.sh from the ngspice directory.
 
      The default installation location of ngspice is the Windows path
@@ -682,17 +685,16 @@ This file describes the procedures to install ngspice from sources.
  $ cd /lib
  $ ln -s libcygwin.a libdl.a.
 
- The procedure of compiling is the same as Linux.
+ The procedure of compiling is the same as with OS Linux.
 
 
 9.4 ngspice console app with MINGW or CYGWIN
 
  Omitting the configure flag --with-wingui will yield a console ngspice.
  You then will not have any graphics interface. In CYGWIN you may add --with-x
- for the X11 graphics (not available in mingw). A typical configure command
+ for the X11 graphics (not available in MINGW). A typical configure command
  may look like
- ./configure --enable-osdi --enable-xspice --enable-cider --enable-openmp
+ ./configure --enable-cider --disable-debug CFLAGS=-m64 LDFLAGS=-m64 prefix=C:/Spice64
- --disable-debug CFLAGS=-m64 LDFLAGS=-m64 prefix=C:/Spice64
 
 
 9.5 cross compiling ngspice for Windows from LINUX
@@ -724,7 +726,7 @@ cross-compile-shared.sh.
     advantage that it supports OpenMP.
  5. Or run the commands manually:  Configure NGSPICE invoking "./configure".
     A complete set of features is:
-      ./configure --enable-cider --enable-xspice --enable-openmp --enable-pss --enable-debug=no
+      ./configure --with-x --enable-cider --disable-debug
  6. Compile NGSPICE invoking "make -j4"
  7. Install NGSPICE invoking "make install" or "sudo make install"
 
@@ -737,7 +739,7 @@ cross-compile-shared.sh.
  4. Execute this command:
       ./autogen.sh
  5. Configure NGSPICE invoking "./configure". A complete set of feature is:
-      ./configure --enable-cider --enable-xspice --enable-openmp --enable-pss --with-readline=yes --enable-debug=no
+      ./configure --enable-cider --disable-debug
  6. Compile NGSPICE invoking "make -j4"
  7. Install NGSPICE invoking "make install" or "sudo make install"