Re: Testing source code program with 0install

On 1 September 2015 at 21:51, Ilja Honkonen <[email protected]> wrote:
> Hello
>
> I have a program, for example:
> int main() {}
> , that I'd like to test by compiling it using several compilers and
> compiler flags. Can I use 0install to automatically compile and run the
> program using all permutations of e.g. "CC = gcc4 gcc5 clang35 clang36
> icc14 icc15" and "CFLAGS = -Os -O0 -O1 -O2 -O3"? The program would also
> have dependencies that I'd like to be compiled with same CC as the program.

It would be nice to support this, but I think there's some work
involved. You'd need to:

- Ensure that 0compile writes to a temporary directory, rather than
caching the results (currently, after compiling with gcc4, it would
assume the resulting binary was still valid when you asked to compile
with gcc5). Setting $XDG_DATA_HOME and $XDG_CONFIG_HOME to point at
temporary directories should do that.

- Provide a way to request different compilers (gcc vs clang), not
just different versions.

- Provide a way to make "0compile autocompile" use the selected
compiler for dependencies too. Creating a directory with the desired
version marked as preferred and setting XDG_CONFIG_HOME to that might
work, except that it would ignore your setting if it created a
conflict (e.g. something only worked with gcc 4), so you might need to
mark everything else as buggy too, which is ugly.

> Should I make each CC into a separate interface required by the program
> (and its dependencies) that only injects some value for CC into the
> environment and similarly for CFLAGS? I could also create separate
> executables from the same source with different compiler flags but the
> same would have to be done for each dependency also which would
> duplicate a lot of interface code. Are there any other options for doing
> this?

If your programs use $CC rather than specifying a 0install dependency
then it's actually easier. You could use 0test to run your build
command with each possible environment, e.g.

0test -t 'run-my-test-builds' http://example.org/gcc 4.0 5.0


-- 
Dr Thomas Leonard        http://roscidus.com/blog/
GPG: DA98 25AE CAD0 8975 7CDA  BD8E 0713 3F96 CA74 D8BA

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