CVS log for pkgsrc/lang/Cg-compiler/buildlink3.mk

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Updated Cg-compiler to latest release, 3.1 from April 2012. This provides a
more useful package than the previous version, complete with examples and
handling distfiles for the i386 and amd64 architectures. This was originally
in pkgsrc-wip and cleaned up for pkgsrc HEAD. Resolved PR/46914 Not a
complete ChangeLog since the version in pkgsrc, but here's what could be
scraped from HOMEPAGE:

The April 2012 version of Cg 3.1 added these improvements:

    Improved GLSL support for clip semantics
    Fixed a runtime bug concerning gp4 and gp5 geometry programs
    Various documentation updates

The February 2012 version of Cg 3.1 added these improvements:

    Added Cg language support for uniform buffers
    Added OpenGL Uni\ufb01ed Buffer Object (UBO) support for buffers
    Added OpenGL GLSL version 110 and 120 translation support
    New tessellation examples added
    New uniform buffer examples added
    VC10 projects added for examples

The February 2011 version of Cg 3.0 added these improvements:

    Improved DX11 tessellation support
    Resolved an issue with nearly identical user defined types
    Resolved an issue with default values from unreferenced uniform parameters
    Support setting matrices beyond 96 float constants in the vp30 profile
    Application supplied compilation options now override those set by cgGLSetOptimalOptions
    Improved support for 'const' variables in the GLSL profiles
    Added sampler state documentation

Set BUILDLINK_ABI_DEPENDS correctly (with +=, not ?=)
It turns out there were a lot of these.

Simply and speed up buildlink3.mk files and processing.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.

Change the format of BUILDLINK_ORDER to contain depth information as well,
and add a new helper target and script, "show-buildlink3", that outputs
a listing of the buildlink3.mk files included as well as the depth at
which they are included.

For example, "make show-buildlink3" in fonts/Xft2 displays:

	zlib
	fontconfig
	    iconv
	    zlib
	    freetype2
	    expat
	freetype2
	Xrender
	    renderproto

Track information in a new variable BUILDLINK_ORDER that informs us
of the order in which buildlink3.mk files are (recursively) included
by a package Makefile.

Aligned the last line of the buildlink3.mk files with the first line, so
that they look nicer.

Over 1200 files touched but no revisions bumped :)

RECOMMENDED is removed. It becomes ABI_DEPENDS.

BUILDLINK_RECOMMENDED.foo becomes BUILDLINK_ABI_DEPENDS.foo.

BUILDLINK_DEPENDS.foo becomes BUILDLINK_API_DEPENDS.foo.

BUILDLINK_DEPENDS does not change.

IGNORE_RECOMMENDED (which defaulted to "no") becomes USE_ABI_DEPENDS
which defaults to "yes".

Added to obsolete.mk checking for IGNORE_RECOMMENDED.

I did not manually go through and fix any aesthetic tab/spacing issues.

I have tested the above patch on DragonFly building and packaging
subversion and pkglint and their many dependencies.

I have also tested USE_ABI_DEPENDS=no on my NetBSD workstation (where I
have used IGNORE_RECOMMENDED for a long time). I have been an active user
of IGNORE_RECOMMENDED since it was available.

As suggested, I removed the documentation sentences suggesting bumping for
"security" issues.

As discussed on tech-pkg.

I will commit to revbump, pkglint, pkg_install, createbuildlink separately.

Note that if you use wip, it will fail!  I will commit to pkgsrc-wip
later (within day).

Recursive revision bump / recommended bump for gettext ABI change.

Import Cg-compiler-1.2.1 from pkgsrc-wip.  Packaged by xtraeme@ and
updated by me.

This is the NVIDIA Cg compiler/toolkit for Linux that includes:

    o NVIDIA Cg toolkit documentation
    o NVIDIA Cg compiler
    o NVIDIA Cg runtime libraries for OpenGL
    o Example shaders written in the Cg language
    o Example applications that use the Cg runtime to manage Cg programs

Initial revision