Getting the starter kit to work for 32bit executable

[alastairtree]

Thanks for the awesome tools!

I am targeting a 32bit embedded system and so wanted my tests to have a similar setup. I spent a while trying to get this starter project and cpputest to work together but in 32bit rather than 64.

I managed it by changing the docker image from gcc to debian with the dockerfile below, reconfiguring cpputest for 32bit and installing gcc and multilib myself:

FROM debian:bullseye

RUN apt-get update \
 && apt-get install --assume-yes --no-install-recommends --quiet \
         build-essential \
         gcc-multilib \
         g++-multilib \
         git \
         autoconf \
         automake \
         libtool

RUN apt-get install --assume-yes --reinstall ca-certificates

WORKDIR /home/cpputest

RUN git clone --depth 1 --branch v4.0 https://github.com/cpputest/cpputest.git .
RUN autoreconf . -i
RUN ./configure CFLAGS=-m32 CXXFLAGS=-m32 LDFLAGS=-m32 --build=x86_64-pc-linux-gnu --host=i686-pc-linux-gnu
RUN make install

ENV CPPUTEST_HOME=/home/cpputest

WORKDIR /home/legacy-build
RUN git clone https://github.com/jwgrenning/legacy-build.git .
RUN git submodule update --init
RUN bash test/all-tests.sh

WORKDIR /home/src

In the makefile I needed to pass the appropriate m32 args to the compiler and linker via the cpputest make variables:

CPPUTEST_CFLAGS += -m32
CPPUTEST_LDFLAGS += -m32
CPPUTEST_CXXFLAGS += -m32
CPPUTEST_CPPFLAGS += -m32

Is there an easier way I am missing? If not then maybe this can be turned into some docs somewhere and might help others.

Thanks