libidn2-2.3.4: Configuration logfiles contain indications of -Wimplicit-function-declaration

[d-lamb (Derek Lamb)]

$ sudo port -s install gcc12   

<...snip...>

--->  Fetching distfiles for libidn2
--->  Attempting to fetch libidn2-2.3.4.tar.gz from https://distfiles.macports.org/libidn2
--->  Verifying checksums for libidn2                                           
--->  Extracting libidn2
--->  Configuring libidn2
Warning: Configuration logfiles contain indications of -Wimplicit-function-declaration; check that features were not accidentally disabled:
  alignof: found in libidn2-2.3.4/config.log
--->  Building libidn2
--->  Staging libidn2 into destroot                      
--->  Installing libidn2 @2.3.4_0                        
--->  Activating libidn2 @2.3.4_0
--->  Cleaning libidn2

<...snip...>

Note the -s flag to install gcc12 from source.

See WimplicitFunctionDeclaration.

I had just upgrade from macOS Monterey to Ventura 13.1, and had reinstalled MacPorts, and was reinstalling ports.

[Marius Schamschula <mschamschula@…>]

In 170668e949f6dbb0f6e7bb099c50fba5e74d922e/macports-ports (master):

libidn2: fix implicit function declaration

Closes: #66614

[evanmiller (Evan Miller)]

Requiring C++11 seems to be overkill here. The libidn2 code base is C99.

[catap (Kirill A. Korinsky)]

In 3ab6e240b0d0ca2cfdfac7ac2fc80823bdfe2d97/macports-ports (master):

libidn2: doesn't really need C++-2011

This requirements dramatically increase a number of compilers which is
required to compile curl -http2 which is used by guys like me with
bootstrap MacPorts which is used to bring fresh libcurl.

See: #66614