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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Exporting linker options from library GPR
Date: Thu, 15 Feb 2018 08:49:41 +0000
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Lucretia <laguest9000@googlemail.com> writes:

Do you think we should raise an issue on github for this discussion? (to
take it off the group)

> I have it building on Mac OS X as a static lib, but the options are
> controlled from the makefile.

When I built it as a dynamic library, I got (with some builds) an ACCVIO
during elaboration, which I took to be down to failing to initialize
libsdlada.dylib (it's not built as an SAL).

> To make it consistent, I'd either have to remove the sdl2-config call
> for other all other OSes and get the flags from the script and copy
> them across, hoping they are correct. Or, the sdl2-config needs to be
> callable and expandable from the gpr file, which I don't think is
> possible.
>
> So, before I push the changes, can anyone tell me if this is possible?

As a possible alternative, the attached makefile fragment works out
whether you're on Darwin or not, so you could decide in the makefile how
to get the options & then pass them through to the gpr.


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Content-Disposition: inline
Content-Description: Mkaefile fragment

DARWIN = $(shell if gcc -v 2>&1 | grep darwin >/dev/null 2>&1; then	\
		   echo 1;						\
		 else							\
		   echo 0;						\
		 fi)

FLAGS = $(shell if [ $(DARWIN) -eq 1 ]; then	\
	          echo "-framework SDL2";	\
		else				\
		  echo "result of sdl2-config";	\
		fi)

all:
	@echo $(FLAGS)

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