libparquet-glib-dev: no definition of struct `_GArrowArrayBuilderClass`

[andre2007]

If have this dockerfile

###############################################################################
## Base image
FROM debian:stretch as base

COPY install.sh /
RUN /install.sh

###############################################################################
## Ldc image
FROM dlang2/ldc-ubuntu:1.19.0 as ldc

RUN apt-get install -y clang-9 libclang-9-dev
RUN ln -s /usr/bin/clang-9 /usr/bin/clang
COPY parquet.dpp /tmp/

COPY --from=base /usr/include/glib-2.0 /usr/include/glib-2.0
COPY --from=base /usr/lib/x86_64-linux-gnu/glib-2.0/include /usr/lib/x86_64-linux-gnu/glib-2.0/include
COPY --from=base /usr/include/arrow-glib /usr/include/arrow-glib
COPY --from=base /usr/include/parquet-glib /usr/include/parquet-glib

COPY --from=base /usr/lib/x86_64-linux-gnu/libparquet-glib.so /usr/lib/x86_64-linux-gnu/libparquet-glib.so
COPY --from=base /usr/lib/x86_64-linux-gnu/libarrow.so /usr/lib/x86_64-linux-gnu/libarrow.so
COPY --from=base /usr/lib/x86_64-linux-gnu/libgobject-2.0.so /usr/lib/x86_64-linux-gnu/libgobject-2.0.so

RUN DFLAGS="-L=-L/usr/lib/llvm-9/lib/" dub run dpp -- /tmp/parquet.dpp \
    --include-path /usr/include/glib-2.0 \
    --include-path /usr/lib/x86_64-linux-gnu/glib-2.0/include \
    --include-path /usr/include/arrow-glib \
    --include-path /usr/include/parquet-glib \
    --preprocess-only

COPY app.d /tmp/
RUN DFLAGS="-L=-L/usr/lib/x86_64-linux-gnu/" ldc2 /tmp/app.d /tmp/parquet.d -of=/tmp/app

Script install.sh looks like this

apt-get update && apt-get install -y -V lsb-release wget
if [ $(lsb_release --codename --short) = "stretch" ]; then
  tee /etc/apt/sources.list.d/backports.list <<APT_LINE
deb http://deb.debian.org/debian $(lsb_release --codename --short)-backports main
APT_LINE
fi
wget https://apache.bintray.com/arrow/$(lsb_release --id --short | tr 'A-Z' 'a-z')/apache-arrow-archive-keyring-latest-$(lsb_release --codename --short).deb
apt install -y -V ./apache-arrow-archive-keyring-latest-$(lsb_release --codename --short).deb
apt update && apt install -y -V libparquet-glib-dev

parquet.dpp looks like this

#include <parquet-glib/arrow-file-reader.h>
#include <parquet-glib/arrow-file-writer.h>

app.d is just

import parquet;
pragma(lib, "parquet-glib");
void main(){}

LDC fails with:

/tmp/parquet.d(226): Error: variable parquet._GArrowBooleanArrayBuilderClass.parent_class no definition of struct _GArrowArrayBuilderClass ... a lot more error messages like this ... The command '/bin/sh -c DFLAGS="-L=-L/usr/lib/x86_64-linux-gnu/" ldc2 /tmp/app.d /tmp/parquet.d -of=/tmp/app' returned a non-zero code: 1

This is somehow strange, because can see it is defined:

[andre2007]

I used dustmite to reduce the problem. This is the reduced testcase

File app.d

struct _GArrowArrayBuilderClass;
struct _GArrowBooleanArrayBuilderClass
{
    _GArrowArrayBuilderClass parent_class;
}

void main(){}

It throws the syntax error:

app.d(4): Error: variable app._GArrowBooleanArrayBuilderClass.parent_class no definition of struct _GArrowArrayBuilderClass

[atilaneves]

Thanks for the reduced code. That is not valid D, and I have to investigate why dpp is generating that code, especially since it's not valid C either

[ananis25]

Hi @andre2007 - did you manage to find a way around this? I don't see clearly why this is not valid C/D code.

[andre2007]

@ananis25 Yes, as far as I remember I had to manually adapt a lot of struct definitions from e.g. struct​ ​_GArrowArrayBuilderClass​; To struct​ ​_GArrowArrayBuilderClass{}​;

[ananis25]

Thank you @andre2007 , I can now get a simple array builder working. I couldn't really see how are opaque structs are represented.