Add *GPL* (or later) licenses

[AMDmi3]

Summary

Most GPL-licensed software actually state that in addition to specific version of GPL they may be licensed under any later version:

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

There is huge difference between e.g. GPLv2 and GPLv2+. For instance, while GPLv2 is not compatible with GPLv3, GPLv2+ is.

Ports framework, though, does not currently differentiate between GPLv2 and GPLv2+.

Some ports mention this in a comment though:

LICENSE= GPLv2 # or later

And some erroneously declare dual licensing:

LICENSE= GPLv2 GPLv3
LICENSE_COMB= dual

To fix this, just add "plus" counterparts to all GPL licenses defined in bsd.license.mk. With this patch, it's possible to specify

LICENSE= GPLv2+

Note that in order to allow plus sign in variable name an extra space is needed after variable name in bsd.licenses.db.mk

The space is needed even in _FOO_${SOMETHING_WHICH_ENDS_WITH_A_PLUS}= case (but only for fmake)

Also, for convenience, split a list of all supported licenses (_LICENSE_LIST) into groups (misc/gpl/bsd/latex/artistic/etc.)

Test Plan

Tested by building GPLv2+ licensed port on all supported FreeBSD versions.

[AMDmi3]

• Further fix for copyfree group name
• Convert more PD-licensed ports to new license

[AMDmi3]

• Split public domain addition into separate review (D4149). This one now only covers GPL "or later" part

[bapt]

Accept considering you do not commit the extra space :)

[antoine]

There is a problem with fmake and some ports
For instance audio/musepack now fails to install with fmake

% fmake -V_LICENSE_FILE_GPLv2+ -C audio/musepack

% make -V_LICENSE_FILE_GPLv2+ -C audio/musepack
/usr/ports/audio/musepack/work/GPLv2+
% fmake -V_LICENSE_TEXT_GPLv2+ -C audio/musepack

% make -V_LICENSE_TEXT_GPLv2+ -C audio/musepack
The license: GPLv2+ (GNU General Public License version 2 (or later)) is standard, please read from the web.

Patch below seems to help but I have no idea if it's enough:

Index: bsd.licenses.mk
===================================================================
--- bsd.licenses.mk     (revision 406010)
+++ bsd.licenses.mk     (working copy)
@@ -317,8 +317,8 @@
 _LICENSE_FILE_${lic}=          ${_LICENSE_STORE}/${lic}
 .                                      else
 #  No license file in /usr/ports/Templates/Licenses
-_LICENSE_TEXT_${lic}=  The license: ${lic} (${_LICENSE_NAME_${lic}}) is standard, please read from the web.
-_LICENSE_FILE_${lic}=  ${WRKDIR}/${lic}
+_LICENSE_TEXT_${lic} = The license: ${lic} (${_LICENSE_NAME_${lic}}) is standard, please read from the web.
+_LICENSE_FILE_${lic} = ${WRKDIR}/${lic}
 .                                      endif
 .                              else
 _LICENSE_ERROR?=       defining LICENSE_TEXT_${lic} is not allowed for known licenses

[antoine]

With previous patch, games/freeminer was still broken with fmake

Patch below helps a bit more

Index: bsd.licenses.mk
===================================================================
--- bsd.licenses.mk     (revision 406010)
+++ bsd.licenses.mk     (working copy)
@@ -317,14 +317,14 @@
 _LICENSE_FILE_${lic}=          ${_LICENSE_STORE}/${lic}
 .                                      else
 #  No license file in /usr/ports/Templates/Licenses
-_LICENSE_TEXT_${lic}=  The license: ${lic} (${_LICENSE_NAME_${lic}}) is standard, please read from the web.
-_LICENSE_FILE_${lic}=  ${WRKDIR}/${lic}
+_LICENSE_TEXT_${lic} = The license: ${lic} (${_LICENSE_NAME_${lic}}) is standard, please read from the web.
+_LICENSE_FILE_${lic} = ${WRKDIR}/${lic}
 .                                      endif
 .                              else
 _LICENSE_ERROR?=       defining LICENSE_TEXT_${lic} is not allowed for known licenses
 .                              endif
 .                      else
-_LICENSE_FILE_${lic}=  ${LICENSE_FILE_${lic}}
+_LICENSE_FILE_${lic} = ${LICENSE_FILE_${lic}}
 .                      endif
 
 .              else

[AMDmi3]

Should be fixed with D4921