This updates the Spack QT package to enable building qt version 4 on
MacOS.
This includes the following changes to the qt package:
* add version 4.8.7
* add option to build with or without shared libs
* add options to disable tools, ssl, sql, and freetype support
* add qt4-tools patch when building qt@4+tools
* add option to build as a framework (only available on MacOS)
* replace qt4-el-capitan patch with qt4-mac patch (which includes the
edits from qt4-el-capitan)
* apply qt4-pcre-include-conflict.patch only for version 4.8.6
(rather than all 4.x versions)
* apply qt4-gcc-and-webkit.patch for 4.x versions before 4.8.7 and
create a separate qt4-gcc-and-webkit-487.patch for version 4.8.7
* update patch function for qt@4 on MacOS to update configure
variables relevant to Spack (e.g. PREFIX)
* add option to build freetype with Spack, as a vendored dependency
of QT, or not at all (default is to build with Spack)
This includes the following edits outside of the qt package:
* Update MacOS version utility function to return all parts of the
Mac version (rather than just the first two)
* gettext package: implement "libs"
* python package: add gettext as a dependency
* Raise an exception and exit with a meaningful message when binary path substitution fails.
* Skip binary text replacement with padding and issue a warning when the new install path is longer than the old install path.
Fixes#12007.
The Cray cc wrappers don't handle the -s flag (strip) cleanly, It's
not essential to strip the binary, so just remove the flag on Cray.
Note: the default build on Cray is for the back end and the unzip
binary won't run on the front end. To build for FE, use something
like arch=cray-fe-x86_64.
* Add +shared variant, which builds shared library in addition to the
static library.
* Install libraries even when specifying the header-only option
(header-only is just about installing an additional folder).
* An additional make call is not required to build generator
executables (they are built by default).
* Streamlined help-line of each variant.
* Fix Mac platform check for dependency in py-ipython package: 'when'
constraints in Spack directives must be Specs (either a Spec
object or a Spec in string format)
* Fix Mac version check in py-numpy: platform.mac_ver() returns a
3-part string as its first tuple item so the check as written would
never pass; use Spack Version object to simplify check.
* Fix Mac version check in qt package (the check was incorrectly
comparing ints and strings) and use Spack version object to
simplify check.
