rtems-libbsd build failure under Python 2

[Jonathan Brandmeyer]

Waf was unable to build rtems-libbsd using the default python. Executing it with Python 3 succeeded. Full reproduction details follow, but the summary is that running the build step with ./waf fails immediately with the error Could not create the directory ///h. Running configuration and build with python 3 succeeds.

Host operating system is Debian Stretch
/usr/bin/python is 2.7.13
/usr/bin/python3 is 3.5.5

Perhaps this is Unicode-specific? locale reports:

LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

Reproduction:
Fresh git checkouts of rtems, rtems-libbsd, and rtems-source-builder, all under ~/src, all at master, with the following sha:

rtems-source-builder: 38241392a4f96da
rtems: 7abc497b6c763c
rtems-libbsd: 5432c6bed37fa26a

Build the rtems toolchain, from rtems-source-builder/rtems, executed:

../sb-set-builder --prefix=$HOME/Programs/rtems_5 --with-fortran --with-lto 5/rtems-arm

Rebuild the rtems build scripts. With $HOME/Programs/rtems_5/bin in the PATH, in the cwd of ~/src/rtems:

./bootstrap -c
$HOME/src/rtems-source-builder/source-buildersb-bootstrap

Create a separate build directory ~/src/build-rtems-zynq, cd into it and build rtems with:

../rtems/configure --prefix=$HOME/Programs/rtems_5 --disable-networking --enable-cxx --enable-smp --target=arm-rtems5 --enable-posix --enable-rtemsbsp=xilinx_zynq_zedboard
make -j<many>

Configure rtems-libbsd. In a pwd of ~/src/rtems-libbsd:

git submodule init
git submodule update rtems_waf
./waf configure --prefix=$HOME/Programs/rtems_5 \
  --rtems-bsps=arm/xilinx_zynq_zedboard \
  --buildset=buildset/default.ini
./waf

Now the bug: Configuration appears to succeed. However, subsequent execution of waf all by itself immediately fails with the error "Could not create the directory /h".

The sequence:

python3 ./waf configure --prefix=$HOME/Programs/rtems_5 \
  --rtems-bsps=arm/xilinx_zynq_zedboard \
  --buildset=buildset/default.ini
python3 ./waf

succeeds.

[Jonathan Brandmeyer]

Reader beware: two forward slashes together are interpreted by Trac as an italic formatting request. The error text is Could not create the directory ///h with three forward slashes (backticks work for literally quoting the machine-output text).

[Chris Johns]

Thank you. I am still considering a way to reproduce this locally.