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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Trying to install the latest GtkAda for Mac on Mojave using
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Date: Mon, 04 Feb 2019 15:44:35 +0000
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Date: 2019-02-04T15:44:35+00:00
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ahlan@marriott.org writes:

> When I type Make I now get
>
> ld: unknown option: -Wl
> collect2: error: ld returned 1 exit status

This is odd.

gprbuild (or gnatmake) calls gnatlink which calls gcc (or maybe g++)
which eventually calls the system ld with appropriate arguments.

-Wl starts an instruction to gcc to pass an argument through to the
system linker: if you say -Wl,-foo,bar then ld sees

   ld ... -foo bar ...

(see https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html).

Ah! the first comma is important: I just tried this,

   $ gnatmake raiser.adb -largs -Wl
   gcc -c raiser.adb
   gnatbind -x raiser.ali
   gnatlink raiser.ali -Wl
   gcc: error: unrecognized command line option '-Wl'; did you mean '-W'?
   gnatlink: error when calling /opt/gcc-8.1.0/bin/gcc
   gnatmake: *** link failed.

Maybe there's a problem in the Makefile.