Not sure why the system libraries can be found for some versions but not others

Author: mrmundt

.travis.yml

@@ -12,10 +12,10 @@ env:
   - secure: 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
   matrix:
   - NAME=python_3.8    SRC_IMAGE=python:3.8-buster             SRC_PYTHON_EXE=python
-  - NAME=python_3.7    SRC_IMAGE=python:3.7-stretch            SRC_PYTHON_EXE=python
-  - NAME=python_3.6    SRC_IMAGE=python:3.6-stretch            SRC_PYTHON_EXE=python
+  - NAME=python_3.7    SRC_IMAGE=python:3.7-buster             SRC_PYTHON_EXE=python
+  - NAME=python_3.6    SRC_IMAGE=python:3.6-buster             SRC_PYTHON_EXE=python
   - NAME=python_3.5    SRC_IMAGE=python:3.5                    SRC_PYTHON_EXE=python
-  - NAME=python_2.7    SRC_IMAGE=python:2.7-stretch            SRC_PYTHON_EXE=python
+  - NAME=python_2.7    SRC_IMAGE=python:2.7-buster             SRC_PYTHON_EXE=python
   - NAME=pypy_3        SRC_IMAGE=pypy:3                        SRC_PYTHON_EXE=pypy3
   - NAME=pypy_2        SRC_IMAGE=pypy:2                        SRC_PYTHON_EXE=pypy
   - NAME=anaconda_3    SRC_IMAGE=continuumio/anaconda3:2018.12 SRC_PYTHON_EXE=python

linux_install_scripts/libs.sh

@@ -3,18 +3,17 @@ RUN echo "" && \
     echo "INSTALLING COMMON LIBS" && \
     echo "======================" && \
     echo ""
-RUN dpkg --add-architecture i386 && \
-    apt-get -q update && \
+RUN apt-get -q update && \
     apt-get -q -y --no-install-recommends install \
         build-essential libssl-dev libffi-dev \
         wget zip unzip \
         git subversion cmake \
         gfortran \
-        gcc-7 g++-7 \
+        libgfortran4 \
         libopenblas-dev \
         liblapack-dev \
         openmpi-bin openmpi-common libopenmpi-dev \
-        libc6:i386 libncurses5:i386 libstdc++6:i386 \
+        libc6 libncurses5 libstdc++6 \
         enchant \
         unixodbc unixodbc-dev && \
     rm -rf /var/lib/apt/lists/*