Code cleanup: don't use unnecessary .exe extension in scons, simplify code.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D236

Found another place where nproc can be used

/proc/cpuinfo is a Linux-specific thing. Using GNU [[ http://www.gnu.org/software/coreutils/manual/html_node/nproc-invocation.html | nproc ]] should be more portable.

Reviewers: mont29

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D377

patch cmake_linux_install.sh to do multithreaded build

The script ##cmake_linux_install.sh## is currently invoking ##make## in single-threaded mode; this patch changes it to take advantage of all available CPU threads.

Reviewers: mont29

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D358

Resubmission: Avoid UUOC in install_deps.sh

This is a resubmission of the original patch from D255. Sorry, I didn�??t understand that subsequent patches added to a diff are considered to //override// previous ones, rather than add to them.

Basically the comment for commit rB554eca1c288e has been applied to the wrong patch.

Reviewers: mont29

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D359

Avoid UUOC in install_deps.sh

The file ##build_files/build_environment/install_deps.sh## contains the following line:

THREADS=`cat /proc/cpuinfo | grep processor | wc -l`

The command within the backticks is a [[ http://catb.org/jargon/html/U/UUOC.html | Useless Use Of Cat ]].

A more compact way of writing the same thing (saving two subprocesses) is

THREADS=`grep -c processor /proc/cpuinfo`

or (using POSIX-preferred command-substitution parentheses instead of backticks)

THREADS=$(grep -c processor /proc/cpuinfo)

But the most compact, and least Linux-specific, way is to use the ##nproc##(1) command from the [[ http://www.gnu.org/software/coreutils/manual/html_node/nproc-invocation.html | GNU coreutils package ]]:

THREADS=$(nproc)

Reviewers: sergey, mont29

Reviewed by: mont29

Differential Revision: https://developer.blender.org/D255

SCons: code cleanup, shorter way to determine makesrna output directory.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D237

SCons: cleaner determination of 32-bit/64-bit builds

Try not to be x86-centric, remove unneeded blenderdeps variable.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D240

Correct help: -b/--background does not take a file argument

The documentation for the -b/--background option incorrectly states that it
takes a <file>, however it can run also without a file with e.g. a script.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D250

Fix missing $BLENDER_USER_DATAFILES in command line help text.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D249

SCons: Simplify Endian determination

Differential Revision: https://developer.blender.org/D252