From fcc027677da55c41dcaea045f5b9ff8b088e6495 Mon Sep 17 00:00:00 2001 From: Bruce Dubbs Date: Sun, 7 Jun 2020 20:16:00 +0000 Subject: Initial commit of alternative cross LFS git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/cross2@11897 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689 --- chapter06/gcc-pass2.xml | 160 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 chapter06/gcc-pass2.xml (limited to 'chapter06/gcc-pass2.xml') diff --git a/chapter06/gcc-pass2.xml b/chapter06/gcc-pass2.xml new file mode 100644 index 000000000..7f7d7a021 --- /dev/null +++ b/chapter06/gcc-pass2.xml @@ -0,0 +1,160 @@ + + + %general-entities; +]> + + + + + + gcc-pass2 + &gcc-version; +
&gcc-url;
+ + + GCC-&gcc-version; - Pass 2 + + + GCC + tools, pass 2 + + + + + + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="../chapter08/gcc.xml" + xpointer="xpointer(/sect1/sect2[1]/para[1])"/> + + <segmentedlist> + <segtitle>&buildtime;</segtitle> + <segtitle>&diskspace;</segtitle> + + <seglistitem> + <seg>&gcc-ch5p2-sbu;</seg> + <seg>&gcc-ch5p2-du;</seg> + </seglistitem> + </segmentedlist> + + </sect2> + + <sect2 role="installation"> + <title>Installation of GCC + + As in the first build of GCC, the GMP, MPFR, and MPC packages are + required. Unpack the tarballs and move them into the required directory + names: + +tar -xf ../mpfr-&mpfr-version;.tar.xz +mv -v mpfr-&mpfr-version; mpfr +tar -xf ../gmp-&gmp-version;.tar.xz +mv -v gmp-&gmp-version; gmp +tar -xf ../mpc-&mpc-version;.tar.gz +mv -v mpc-&mpc-version; mpc + + If building on x86_64, change the default directory name for 64-bit + libraries to lib: + +case $(uname -m) in + x86_64) + sed -e '/m64=/s/lib64/lib/' \ + -i.orig gcc/config/i386/t-linux64 + ;; +esac + + Fix an issue with GCC-10.1 when building with a cross + compiler: + +patch -Np1 -i ../&gcc-cross-patch; + + Create a separate build directory again: + +mkdir -v build +cd build + + Create a symlink that allos libgcc to be built with posix threads + support: + +mkdir -pv $LFS_TGT/libgcc +ln -s ../../../libgcc/gthr-posix.h $LFS_TGT/libgcc/gthr-default.h + + Before starting to build GCC, remember to unset any environment + variables that override the default optimization flags. + + Now prepare GCC for compilation: + +../configure \ + --build=$(../config.guess) \ + --host=$LFS_TGT \ + --prefix=/usr \ + CC_FOR_TARGET=$LFS_TGT-gcc \ + --with-build-sysroot=$LFS \ + --enable-initfini-array \ + --disable-nls \ + --disable-multilib \ + --disable-decimal-float \ + --disable-libatomic \ + --disable-libgomp \ + --disable-libquadmath \ + --disable-libssp \ + --disable-libvtv \ + --disable-libstdcxx \ + --enable-languages=c,c++ + + + The meaning of the new configure options: + + + -with-build-sysroot=$LFS + + Normally, using --host= ensures that + a cross-compiler is used for building gcc, and that compiler knows + that it has to look for headers and libraries in $LFS. But the build system of GCC uses + other tools, which are not aware of this location. This switch is + needed to have them find the needed files in $LFS, and not on the host. + + + + + --enable-initfini-array + + This option is automatically enabled when building a native + compiler with a native compiler on x86. But here, we build with + a cross compiler, so we need to explicitely set this option. + + + + + + Compile the package: + +make + + Install the package: + +make DESTDIR=$LFS install + + As a finishing touch, create a symlink. Many programs and scripts + run cc instead of gcc, which is + used to keep programs generic and therefore usable on all kinds of UNIX + systems where the GNU C compiler is not always installed. Running + cc leaves the system administrator free to decide + which C compiler to install: + +ln -sv gcc $LFS/usr/bin/cc + + + + + + + <para>Details on this package are located in + <xref linkend="contents-gcc" role="."/></para> + + </sect2> + +</sect1> -- cgit v1.2.3-54-g00ecf