MidgardOS Developer Documentation

A website documenting creating the build root for MidgardOS

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Section 2 - Cross-Compilation Toolchain

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GNU C Library - 32-bit

Name: glibc-32bit
Summary: The GNU C language runtime library - 32-bit
License: GPL v2.0+/LGPL 2.1+
Version: 2.42
URL: https://ftp.gnu.org/gnu/glibc/glibc-2.42.tar.xz

Configuration

To configure GNU C Library 32-bit build for install into our cross-compilation root, run the following command from inside the previously created build directory:

make clean
find .. -name "*.a" -delete
CC="$BRFS_TARGET-gcc -m32" CXX="$BRFS_TARGET-g++ -m32" \
../configure \
    --prefix=/tools                   \
    --host=${BRFS_TARGET32}           \
    --build=${BRFS_HOST}              \
    --enable-kernel=5.4               \
    --with-headers=$BRFS/usr/include  \
    --enable-bind-now                 \
    --enable-stackguard-randomization \
    --enable-tunables                 \
    --with-bugurl="https://github.com/MidgardOS/MidgardOS/Issues" \
    --libdir=/usr/lib                 \
    --libexecdir=/usr/lib             \
    libc_cv_slibdir=/usr/lib

Stay in the build directory until this package is installed.

Compilation and Installation

To compile GNU C Library 32-bit build, run the following command:

make

Finally, to install the GNU C Library 32-bit build into the cross-tools tree, run the following command:

make DESTDIR=$PWD/DESTDIR install
cp -a DESTDIR/usr/lib $BRFS/usr/ ||:
install -v -m 644 DESTDIR/tools/include/gnu/{lib-names,stubs}-32.h $BRFS/usr/include/gnu
ln -sfv ../lib64/ld-linux-x86-64.so.2 ${BRFS}/lib64/ld-lsb-x86-64.so.3

If an operation not permitted error comes up around preserving times for the /MidgardOS/usr/lib, please ignore this, as the lib directory already exists.

Validation

It is critically important to validate that the new GLibC 32-bit build is working as expected in tandom with the temporary compiler instance in the system. To do so, run the following commands:

echo 'int main(){}' > dummy.c
$BRFS_TARGET-gcc -m32 dummy.c
readelf -l a.out | grep '/ld-linux'

This should return the following output:

      [Requesting program interpreter: /lib/ld-linux.so.2]

If this is successful, you can move on to the next step in the guide.

More details about this package is covered later in the core system build.

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