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5.8.1. Installation of Target Libstdc++
Note
Libstdc++ is part of the GCC sources. You should first unpack the GCC tarball and change to the gcc-9.
2.0 directory.
Note
Libstdc++ is part of the GCC sources. You should first unpack the GCC tarball and change to the gcc-9.
2.0 directory.
Create a separate build directory for Libstdc++ and enter it:
mkdir -v build cd build
mkdir -v build cd build
Prepare Libstdc++ for compilation:
../libstdc++-v3/configure
--host=$LFS_TGT
--prefix=/tools
--disable-multilib
--disable-nls
--disable-libstdcxx-threads
--disable-libstdcxx-pch
\
\
\
\
\
\
\
../libstdc++-v3/configure
--host=$LFS_TGT
--prefix=/tools
--disable-multilib
--disable-nls
--disable-libstdcxx-threads
--disable-libstdcxx-pch
--with-gxx-include-dir=/tools/$LFS_TGT/include/c++/9.2.0
--with-gxx-include-dir=/tools/$LFS_TGT/include/c++/9.2.0
The meaning of the configure options:
--host=...
Indicates to use the cross compiler we have just built instead of the one in /usr/bin.
--disable-libstdcxx-threads
Since we have not yet built the C threads library, the C++ one cannot be built either.
--disable-libstdcxx-pch
This switch prevents the installation of precompiled include files, which are not needed at this stage.
--with-gxx-include-dir=/tools/$LFS_TGT/include/c++/9.2.0
This is the location where the standard include files are searched by the C++ compiler. In a normal build, this information is automatically passed to the Libstdc++ configure options from the top level directory. In our case, this information must be explicitly given.
Compile libstdc++ by running:
make
make
Install the library:
make install
make install