Remove more Requirement logic to enable future removal of default
formula logic. Also, output deprecations, convert symbol requirement
usage to deps and simplify the compatibility code for the direct
Requirement usage.
These are ones that were either already deprecated due to audit rules
or are just a simple `which` with a `default_formula` so should just
be a dependency.
CMake tries to use Xcode if MACOSX_DEPLOYMENT_TARGET is set but that can
lead to build failures when SDKROOT isn't set. The CMake behavior at
minimum manifests as -isysroot spontaneously being set to the Xcode SDK,
which brew sometimes can't successfully fully unwind with its ENV hacks.
- atomic_write: close file before renaming to prevent error:
'Device or resource busy'
- ensure_writable: preserve executable bit
- new elf? and dynamic? methods
This enhances the Java requirement to support prompting the user
to install the correct legacy Java version via Cask for formulae
that don't yet work with the latest version of Java. Previously,
even if the formula had a strict requirement that a specific,
older version of Java be used, the messaging would tell the user to
`brew cask install java` (i.e. to install the latest version of Java),
which wouldn't actually satisfy the requirement.
During the changes to macho file relocation refactoring
in #3101, #3138, and #3139,
the number of arguments to the mach::change_install_name
function changed from 3 to 2, but
there was still an instance of the function being called
with the wrong number of arguments.
The GNU Autotools tests for whether futimens and utimensat are available
reliably come to incorrect conclusions on 10.12 with the 10.13 SDK in
Xcode 9. This overrides its decisions by forcing the right answer
in superenv using ac_cv_func_* environment variables and setting them to
"no" on 10.12.
- `brew update` should try to install `curl` before `git` on older
versions of Mac OS X where it is needed for accessing modern SSL
certificates.
- We don't need an HTTP mirror for `git` because `curl` will already be
installed before it is downloaded.
- Don't recommend GCC on Mac OS X versions where it can't be built with
the default system compiler.
- Start using the Homebrew `curl` on Mac OS X versions where it is
needed as soon as it is installed.
This avoids `brew doctor` warnings on High Sierra but in general this is
a good idea for future versions and to allow Homebrew developers to test
things out with different versions of Ruby.
