emacs @26.1: emacs port requires autoconf

[david135 (David Roth)]

I'm running macOS High Sierra 10.13.5 Beta (17F70a), Xcode 9.4 Build version 9F1027a. The command I used was sudo port install emacs.

When installing emacs 26.1, I found that I had to first manually install autoconf (sudo port install autoconf), which was not installed automatically as a dependency.

Following is the log from the failure:

:info:configure Checking whether you have the necessary tools...
:info:configure (Read INSTALL.REPO for more details on building Emacs)
:info:configure Checking for autoconf (need at least version 2.65) ... missing
:info:configure Building Emacs from the repository requires the following specialized programs:
:info:configure autoconf (minimum version 2.65)
:info:configure Your system seems to be missing the following tool(s):
:info:configure autoconf (missing)
:info:configure If you think you have the required tools, please add them to your PATH
:info:configure and re-run this script.
:info:configure Otherwise, please try installing them.
:info:configure On systems using rpm and yum, try: "yum install PACKAGE"
:info:configure On systems using dpkg and apt, try: "apt-get install PACKAGE"
:info:configure Then re-run this script.
:info:configure If you do not have permission to do this, or if the version provided
:info:configure by your system is too old, it is normally straightforward to build
:info:configure these packages from source.  You can find the sources at:
:info:configure https://ftp.gnu.org/gnu/PACKAGE/
:info:configure Download the package (make sure you get at least the minimum version
:info:configure listed above), extract it using tar, then run configure, make,
:info:configure make install.  Add the installation directory to your PATH and re-run
:info:configure this script.
:info:configure If you know that the required versions are in your PATH, but this
:info:configure script has made an error, then you can simply re-run this script with
:info:configure the --no-check option.
:info:configure Please report any problems with this script to bug-gnu-emacs@gnu.org .
:info:configure Command failed: sh ./autogen.sh
:info:configure Exit code: 1
:error:configure Failed to configure emacs: command execution failed
:debug:configure Error code: NONE
:debug:configure Backtrace: command execution failed

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #56599. I added an explanation of the problem in comment:ticket:56599:1. Dan, can you fix the problem please?

[wyuenho (Jimmy Yuen Ho Wong)]

I have a fix for this in my PR, I'm working on updating the emacs-app port but the base port happened to fail CI, might as well.

​https://github.com/macports/macports-ports/pull/1936

[ryandesign (Ryan Carsten Schmidt)]

[36b60fd44e67f7655e00994280c8915f715f2d5b/macports-ports]