Ocaml #248
Ocaml #248
Conversation
This class builds the OCAMLPATH wich is required by ocaml to find the dependencies. Also a helper to replace the fixed ocamlrun interpreter is provided.
There was a problem hiding this comment.
Could you please add a chapter in doc/usage.rst how Ocaml is supposed to be used? I managed to get a hello world compiled but then it depends on ocamlrun. How does that come onto the target? When I tried to use ocamlopt I got the following:
bash-5.2$ ocamlopt -o hello hello.ml -verbose
+ x86_64-bob_compat-linux-gnu-as -o 'hello.o' '/tmp/camlasmb63199.s'
sh: line 1: x86_64-bob_compat-linux-gnu-as: command not found
File "hello.ml", line 1:
Error: I/O error: x86_64-bob_compat-linux-gnu-as -o 'hello.o' '/tmp/camlasmb63199.s'
Apparently it needs the original host-toolchain which leaves me a bit puzzled. Is this intended?
| for j in $i/usr/lib/* ; do | ||
| if [[ -d "$j" ]] ; then | ||
| if [ -e "$j/META" ] ; then | ||
| OCAMLPATH+="" |
| ./configure \ | ||
| ${AUTOCONF_BUILD:+--build=${AUTOCONF_BUILD}} \ | ||
| ${AUTOCONF_HOST:+--host=${AUTOCONF_HOST}} \ | ||
| ${AUTOCONF_TARGET:+--target=${AUTOCONF_TARGET}} \ |
There was a problem hiding this comment.
AUTOCONF_TARGET is not part of buildVars. I guess you have never built a cross-compiler?
| popd | ||
| export PATH=${PATH}:$(pwd)/.bob | ||
|
|
||
| ./configure \ |
There was a problem hiding this comment.
Is there a particular reason why you do not use autotoolsBuild? This applies to basically all packages.
There was a problem hiding this comment.
Yes - because autotoolsBuild is not working. Using autotoolsBuild it fails with:
make: *** No targets specified and no makefile found. Stop.
The reason is, that configure did not produce the makefiles in the current working directory, it's always in the folder of the configure script. - but autotoolsBuild uses a build-folder where it runs configure and assumes the makefiles to be generated.
To use the code from the autotools-class I think we can either
- move the
configurepart of theautotools- class into a separate class and reuse it from there - add a argument to
autotoolsBuildskipping the pushd build
Do you see another option? Which one do you prefer?
There was a problem hiding this comment.
Oh my gosh! It's really that borken. 🤦 In this case I would rather not touch the autotools class. But a small comment with exactly this explanation would be appreciated. Otherwise we'll start wondering again a couple of years down the road why the autotools class isn't use...
|
|
||
| checkoutSCM: | ||
| scm: git | ||
| url: [email protected]:hubert/opam.git |
|
I'm using this only for host-stuff ATM. In particular some required stuff for compiling mesa with intel drivers is in ocaml. I took a look in how to build a Ocaml cross compiler some months ago, but gave up as there I'll comment this but I don't want to spend time in building a ocaml cross compiler now - if this is ok for you? For further investigations: |
This is perfectly fine for me. We can add the cross-compiler support when its needed. But having some information in the docs about how this is supposed to be used is something that I indeed would want to have. Otherwise it is unusable by others, which would be a pity. We might also add some simple hello-world test in |
Depends on #247