Deps Makefiles do not work for cross-compilation

[ghost]

The following dependencies (deps/) break when trying to cross-compile using the configure command ./configure --host=$(SOME_TOOLCHAIN):

• ae
• inih
• murmurhash

This seems to be related to the line in each of their related Makefiles: CC = /usr/bin/gcc. Also, these makefiles overwrite the CFLAGS and LDFLAGS variables. Ideally I believe all of this information would be picked up from the configuration step.

Removing the CC line and changing CFLAGS and LDFLAGS from = to += worked for me in getting the project to cross-compile successfully.

[armon]

Could you please send a PR? Thanks!

[ghost]

I'll definitely look into it. Haven't used automake too much personally, and making my simple change doesn't quite have the expected behavior outside of the build system I'm using. When I compile on a Mac using the suggestion I made above, it uses cc and doesn't pick up the automake CFLAGS for the deps folders, and gcc with the right CFLAGS for everything else. So I'll hold off on the PR for now until I have something that works across the board. Any ideas on how to build the deps with automake as well?

[johnkeates]

I've done almost all of the automake conversion for this project, initially, without putting the deps into automake since they may need to be split off or pulled in a packages on other systems.

Basically, if you want to choose a different compiler, it will depend on your system's defaults and/or any environment variables you set before the build (they override the presets).

You could also try re-generating the autotools stuff by running bootstrap before configure+make, since it could pull in any system-specific dependencies first.

[ghost]

@johnkeates Yeah, that's how I did get it cross-compiling for my system. I set all of the CC, AR, etc., build variables. I guess my suggestion would be to have the deps not explicitly override the CC variable as they currently do to allow the system defaults to be picked up without manual configuration if full automake isn't an option. Currently, the deps don't fall back to system default and someone trying to cross-compile needs to poke around in the makefiles to find that CC (and also CFLAGS and LDFLAGS) are being explicitly overwritten.

[johnkeates]

I'm currently working on a few changes, they might help with your compilation issue. I'm also thinking about maybe adding some stuff for multi-target tools, as right now I only added a Debian vagrant box and I'm pretty sure there's going to be a need more more targets. I do know that within Debian, it's possible to cross-compile by default, and that you can generate packages for other Linux distro's as well, but I'm not sure how much work that would need vs. how many people want this.