[unix] Make .configure script COMPILED_BY parameter optional, def…

…aulting to login name.

changes.txt

@@ -138,6 +138,9 @@ Other Noteworthy
     cause POV-Ray to print its abbreviated version number to standard output.
   - The `unix/prebuild.sh` script can now be run from the main directory; it is
     no longer necessary to change to the unix directory first.
+  - The `./configure` script can now be run without the `COMPILED_BY=...`
+    option. In this case it defaults to `$USER <no contact address>`, where
+    `$USER` is your login name.
 
 
 Changes between 3.7.1-beta.9 and 3.7.1-rc.1

unix/configure.ac

@@ -30,7 +30,7 @@
 #
 ##############################################################################
 
-# configure.ac for the source distribution of POV-Ray 3.8 for UNIX
+# configure.ac for the source distribution of POV-Ray v3.8 for UNIX
 # Report bugs via https://github.com/POV-Ray/povray/issues
 #
 # Based on configure.ac from POV-Ray v3.7
@@ -109,7 +109,7 @@ AX_ARG_WITH([--with-libsdl],        [DIR], [use the SDL library (in directory DI
 AX_ARG_WITH([--with-libmkl],        [DIR], [use the Intel(R) Math Kernel Library (in directory DIR)])
 AX_ARG_WITH([--with-openexr],       [DIR], [use the OpenEXR library (in directory DIR)]) 
 
-AC_ARG_VAR([COMPILED_BY], [customize the "unofficial version" message (required argument)])
+AC_ARG_VAR([COMPILED_BY], [customize the "unofficial version" message])
 AC_ARG_VAR([NON_REDISTRIBUTABLE_BUILD], [see the installation documentation])
 AC_ARG_VAR([C99_COMPATIBLE_RADIOSITY], [adapt radiosity code to non-IEEE 754 floating point, requires ISO C99 compiler and library (see octree.cpp for details)])
 
@@ -122,29 +122,7 @@ rm -f ./povray.ini
 
 # Instruction message.
 if test x"$COMPILED_BY" = x""; then
-  echo "
-Welcome to the $PACKAGE_NAME $PACKAGE_VERSION configure script.
-
-This script will prepare the source distribution of $PACKAGE_NAME $PACKAGE_VERSION for Unix
-for compilation on this machine.  Compiling the program yourself means
-that the POV-Ray Team(tm) is not responsible for supporting this
-version, no matter if it is the unmodified official POV-Ray source code
-or a customized version.  Refer to the POV-Ray source license conditions
-that come with this package.
-
-In order to start configuration, you have to provide a valid contact
-information that will be included in the executable and displayed
-whenever POV-Ray (or a modified version of it) is started.  In case
-you intend to distribute this binary, this information will help users
-to contact the appropriate maintainers.  To start configuring $PACKAGE_NAME
-type in the following command with your own contact information:
-
-./configure COMPILED_BY=\"your name <email@address>\"
-
-Please consult the INSTALL file for additional configuration and
-installation instructions.
-"
-  exit 1
+  COMPILED_BY="$USER <no contact address>"
 fi
 
 pov_no_distrib="${NON_REDISTRIBUTABLE_BUILD:-no}"

unix/install.txt

@@ -40,7 +40,7 @@ usual 'configure' and 'make' commands.  For a system-wide installation:
   make check
   sudo make install
 
-The COMPILED_BY argument to 'configure' is mandatory and must be filled
+The COMPILED_BY argument to 'configure' should be filled
 with your name and/or organization so that the generated binary can be
 differentiated from official POV-Ray builds.
 
@@ -92,12 +92,12 @@ The build system must have:
 - a working 'make' utility.  We strongly recommand to use GNU Make version 3.79
   or above.  Most GNU/Linux distribution should come with it.  Other platforms
   should install it before running configure.  GNU make can be found at:
-  http://www.gnu.org/software/make
+  https://www.gnu.org/software/make/
 
 - in the unlikely case you don't have a Bourne-compatible shell installed
   on your system or that the shell fails running POV-Ray's configure, it is
   recommanded to install GNU bash first.  Download it at:
-  http://www.gnu.org/software/bash
+  https://www.gnu.org/software/bash/
 
 
 2.2 Required support libraries
@@ -140,7 +140,7 @@ recommanded to generate a fully-featured POV-Ray executable.
   http://www.libsdl.org
 
 
-2.3 Compatibility issues
+2.4 Compatibility issues
     ====================
 
 - Boost version 1.46 has been reported to be unstable on the Raspberry Pi 2.
@@ -183,7 +183,7 @@ Configure POV-Ray for building and installing in standard directories:
 
 Here, these commands are run in the source directory of POV-Ray (but this is
 not required, see section 3.1.3 below).  Note that the COMPILED_BY argument
-is mandatory.  The 'check' target for 'make' may be omitted (no test render
+is highly recommended. The 'check' target for 'make' may be omitted (no test render
 is performed) in particular when building POV-Ray in batch.
 
 The top Makefile generated by configure supports the following targets:
@@ -472,10 +472,11 @@ Additional POV-Ray specific options are:
     risk.
 
 COMPILED_BY="your name <email@address>"
-    this option is required when configuring the source package.  Please
-    provide with a valid contact information that will be included in the
+    this option is highly recommended when configuring the source package.
+    Please provide a valid contact information that will be included in the
     executable and displayed whenever POV-Ray (or a modified version) is
-    started.
+    started.  If not specified, this option will default to your login
+	name and "<no contact address>".
 
 NON_REDISTRIBUTABLE_BUILD=yes
     this option must be used in case one needs to build POV-Ray without