[m-users.] Pass options to gcc compiler

[Sean Charles (emacstheviking)]

Fixed it with:  
	--c-include-directory  /opt/homebrew/include/SDL2

This is a mystery, I have never used this flag before in my SDL2 projects!
Just lucky I guess... if I have time I'll boot up my older imac and check out the projects. Very odd.

Presumably there is an equivalent linker option for the libs folder.

Thanks for your time agian Zoltan.


> On 16 Nov 2022, at 21:08, Sean Charles (emacstheviking) <objitsu at gmail.com> wrote:
> 
> OK, -V is a good option!!
> I added that to my makefile and rebuilt, near the end I saw the compiler invocation:
> 
> % Compiling `Mercury/cs/agame.c':
> % Invoking system command `gcc -I. -I. -I./Mercury/mihs -I/usr/local/mercury-22.01.3/lib/mercury/lib/hlc.gc/inc -I/usr/local/mercury-22.01.3/lib/mercury/conf -I/usr/local/mercury-22.01.3/lib/mercury/inc   -O2 -fomit-frame-pointer -fno-strict-aliasing -DMR_HIGHLEVEL_CODE -DMR_CONSERVATIVE_GC -DMR_BOEHM_GC -DMR_TAGBITS=3        -w    -c Mercury/cs/agame.c -o Mercury/os/agame.o'...
> 
> So it is definitely using gcc at least. The output was been truncated. It says to see agame.err for the complete log but that doesn't contain the above line. I am very suspicious of the two initial '-I' options as they appear to be just pointing at the current folder? I see no mention of my desired include paths in the final output so for some reason as yet undetermined I've failed to pass these through to the build process!
> 
> The worst part is I know it's my fault....   :|
> 
> Sean.
> 
> 
>> On 16 Nov 2022, at 20:51, Zoltan Somogyi <zoltan.somogyi at runbox.com> wrote:
>> 
>> 
>> 2022-11-17 07:45 GMT+11:00 "Sean Charles (emacstheviking)" <objitsu at gmail.com>:
>>> What I tried to ask for is how do I know what the final set of include paths is at compile time, and what compiler does mmc use as the default?
>> 
>> The section "Output options" in the user's guide, which is section 9.4
>> in the ROTD version, has several options that print relevant information.
>> You can also just give the -V flag to mmc, and it will tell you the exact
>> command line it is using to compile the .c file to .o.
>> 
>> Zoltan.
> 

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