gmp: Use MacPorts m4

[ryandesign]

Description

Xcode 15.3 CLT doesn't include m4, possibly due to an oversight.

Closes: https://trac.macports.org/ticket/69464

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 12.7.2 21G1974 x86_64
Xcode 14.2 14C18

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL in commit message?
• checked your Portfile with port lint --nitpick?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?
• checked that the Portfile's most important variants haven't been broken?

[macportsbot]

Notifying maintainers:
@MarcusCalhoun-Lopez for port gmp.

[barracuda156]

@ryandesign Has Macports m4 been fixed for Leopard?

[ryandesign]

I didn't remember that m4 was broken on Leopard. If you're referring to one of the open tickets about m4, then, since they're still open, I guess not.

[MarcusCalhoun-Lopez]

I believe adding use_xcode yes also fixes the problem but without adding a new dependency.

[barracuda156]

I believe adding use_xcode yes also fixes the problem but without adding a new dependency.

Should it be conditionally on OS version?

[ryandesign]

Yes, using the full Xcode would work. I think that would be large and unnecessary, however.

The CLT also still includes gm4 which is the same program as m4 so we could use that.

But for consistency and to receive all available bug fixes, performance enhancements, and other improvements, I suggest always depending on the m4 port and forgetting about what Xcode and/or the CLT may provide.

[MarcusCalhoun-Lopez]

But for consistency and to receive all available bug fixes, performance enhancements, and other improvements, I suggest always depending on the m4 port and forgetting about what Xcode and/or the CLT may provide.

I have no strong feelings on the matter, but gmp is an important part of supporting older systems.
I have not looked into m4 specifically, but having gmp with as few dependencies as possible tends to make supporting older systems easier.

[ryandesign]

Do as you will, but m4 is a pretty basic utility. It's needed by autoconf, for example, and autoconf no longer supports the pre-GPL-3 version of m4 Apple ships. And m4 only depends on gettext and libiconv which are pretty foundational as well; not much is going to build if gettext and libiconv don't build.

[MarcusCalhoun-Lopez]

Do as you will, but m4 is a pretty basic utility. It's needed by autoconf, for example, and autoconf no longer supports the pre-GPL-3 version of m4 Apple ships. And m4 only depends on gettext and libiconv which are pretty foundational as well; not much is going to build if gettext and libiconv don't build.

Thank you for the insight.