diff options
| author | Xi Ruoyao <xry111@mengyan1223.wang> | 2022-02-27 01:09:05 +0800 |
|---|---|---|
| committer | Xi Ruoyao <xry111@mengyan1223.wang> | 2022-02-27 23:36:55 +0800 |
| commit | 459d4936aec6671d94a0a4be918d8efbbc130215 (patch) | |
| tree | 7c418c9970c882b31a73fde8b58f7f5aa55478de /chapter06 | |
| parent | cbd0a9a98e1fc17cf652b6db5fa223fe5b3043fa (diff) | |
fix GCC PR100017 and enable libstdc++ for pass 2
This is the issue preventing us from cross-compiling libstdc++ in
Chapter 6. By fixing this issue we can remove a seperate pass 2 for
libstdc++ and simplify the instruction.
The upstream fix will be released in 11.3 and 12.0, so we can remove the
first sed upgrading gcc next time.
Diffstat (limited to 'chapter06')
| -rw-r--r-- | chapter06/gcc-pass2.xml | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/chapter06/gcc-pass2.xml b/chapter06/gcc-pass2.xml index bf3007848..6dd6f90a5 100644 --- a/chapter06/gcc-pass2.xml +++ b/chapter06/gcc-pass2.xml @@ -62,23 +62,24 @@ mv -v mpc-&mpc-version; mpc</userinput></screen> sed -e '/m64=/s/lib64/lib/' -i.orig gcc/config/i386/t-linux64 ;; esac</userinput></screen> -<!-- - <para>Fix an issue with GCC-10.1 when building with a cross - compiler:</para> -<screen><userinput remap="pre">patch -Np1 -i ../&gcc-cross-patch;</userinput></screen> ---> + <!-- https://gcc.gnu.org/PR100017 --> + <para>Fix an issue causing failure cross-compiling libstdc++:</para> + +<screen><userinput remap="pre">sed 's/gnu++17/& -nostdinc++/' \ + -i libstdc++-v3/src/c++17/Makefile.in</userinput></screen> + + <para>Override the building rule of libgcc and libstdc++ headers, to + allow building these libraries with POSIX threads support:</para> + +<screen><userinput remap="pre">sed '/thread_header =/s/@.*@/gthr-posix.h/' \ + -i libgcc/Makefile.in libstdc++-v3/include/Makefile.in</userinput></screen> + <para>Create a separate build directory again:</para> <screen><userinput remap="pre">mkdir -v build cd build</userinput></screen> - <para>Create a symlink that allows libgcc to be built with posix threads - support:</para> - -<screen><userinput remap="pre">mkdir -pv $LFS_TGT/libgcc -ln -s ../../../libgcc/gthr-posix.h $LFS_TGT/libgcc/gthr-default.h</userinput></screen> - <para>Before starting to build GCC, remember to unset any environment variables that override the default optimization flags.</para> @@ -89,6 +90,8 @@ ln -s ../../../libgcc/gthr-posix.h $LFS_TGT/libgcc/gthr-default.h</userinput></s --host=$LFS_TGT \ --prefix=/usr \ CC_FOR_TARGET=$LFS_TGT-gcc \ + CXX_FOR_TARGET=$LFS_TGT-g++ \ + LDFLAGS_FOR_TARGET=-L$PWD/$LFS_TGT/libgcc \ --with-build-sysroot=$LFS \ --enable-initfini-array \ --disable-nls \ @@ -99,7 +102,6 @@ ln -s ../../../libgcc/gthr-posix.h $LFS_TGT/libgcc/gthr-default.h</userinput></s --disable-libquadmath \ --disable-libssp \ --disable-libvtv \ - --disable-libstdcxx \ --enable-languages=c,c++</userinput></screen> <variablelist> |