Re: [MacPorts] #74106: giflib5 @5.2.2₃ does not build on PPC Leopard, Mac OS X 10.5.8, because of cc1: error: unrecognized command line option "-Wno-format-truncation"

[MacPorts]

#74106: giflib5 @5.2.2₃ does not build on PPC Leopard, Mac OS X 10.5.8, because of
cc1: error: unrecognized command line option "-Wno-format-truncation"
------------------------+-------------------------
  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.12.5
Resolution:             |   Keywords:  ppc leopard
      Port:  giflib5    |
------------------------+-------------------------

Comment (by PotMJ):

 I have verified a lightweight alternative patch that successfully compiles
 `giflib5` natively on legacy setups (tested across both OS X 10.5.8 Intel
 and OS X 10.11.6) without introducing heavy, problematic toolchain
 dependencies like modern GCC.  It successfully builds 4 arch +universal on
 10.5.8.

 The issue stems from a hardcoded modern warning flag (`-Wno-format-
 truncation`) and standard Makefile architecture multi-flags crashing
 baseline compilers during universal loops.

 The attached updated `Portfile` fixes this cleanly by:
  1. Adding a lightweight conditional block (`${os.major} < 16`) inside
 `post-patch` to safely `reinplace` and strip out the unsupported flag.
  2. Integrating `PortGroup muniversal 1.0` and updating the active build
 arguments to cleanly separate and compile the individual architecture
 slices.

 This allows the library to compile entirely out-of-the-box using the
 native system toolchains, keeping the dependency tree small and clean for
 vintage systems.

-- 
Ticket URL: <https://trac.macports.org/ticket/74106#comment:4>
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