我使用gcc-6.3.0,musl-1.1.16和binutils-2.27爲一個MIPS 24kc(dragino)目標平臺從零開始構建了一個自定義工具鏈。該工具鏈功能完全正常。如何從頭開始獲得更小的工具鏈?
但是,我的自定義工具鏈的大小比同等OpenWRT生成的工具鏈(557M vs 113M)的大小大五倍。由OpenWRT生成的工具鏈二進制文件(mips-openwrt-linux-musl- *)與libstdC++和libgcc_s庫動態鏈接。但是,我的工具鏈二進制文件與這些庫靜態鏈接:
$ ldd mips-openwrt-linux-musl-gcc-5.3.0
linux-vdso.so.1 => (0x00007ffc4d534000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f878936f000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f8789159000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f8788d8f000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f8788a86000)
/lib64/ld-linux-x86-64.so.2 (0x000055df3ef8b000)
$ ldd mips-linux-musl-gcc-6.3.0
linux-vdso.so.1 => (0x00007ffd40940000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f2de4b8f000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2de47c6000)
/lib64/ld-linux-x86-64.so.2 (0x0000560bba4b6000)
cc1和cc1plus會發生同樣的鏈接問題。這兩個二進制文件的大小很大(cc1是124MB,cc1plus是134MB)。
我的問題是:什麼是設置交叉工具鏈生成以獲得與OpenWRT生成的工具鏈一樣小的跨平臺工具鏈的正確方法?
婁你可以找到我在做建立我的定製工具鏈,以供參考步驟:
下載來源:
wget http://ftpmirror.gnu.org/binutils/binutils-2.27.tar.bz2
wget http://ftpmirror.gnu.org/gcc/gcc-6.3.0/gcc-6.3.0.tar.bz2
wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.12.6.tar.bz2
wget https://www.musl-libc.org/releases/musl-1.1.16.tar.gz
wget http://ftpmirror.gnu.org/mpfr/mpfr-3.1.5.tar.bz2
wget http://ftpmirror.gnu.org/gmp/gmp-6.1.2.tar.bz2
wget http://ftpmirror.gnu.org/mpc/mpc-1.0.2.tar.gz
設置編譯環境:
export ROOTDIR="${HOME}/custom-toolchains/MIPS"
export NATIVE_PREFIX="${ROOTDIR}/opt/native"
export CROSS_PREFIX="${ROOTDIR}/opt/cross"
export TARGET_MACHINE=mips
export CPU=mips
export ARCH=24kc
export CLIB=musl
export TARGET_TRIPLET=${CPU}-linux-${CLIB}
構建本地binutils:
cd ${ROOTDIR}/src
mkdir build-binutils
cd build-binutils
../binutils-2.27/configure --prefix="${NATIVE_PREFIX}" --disable-nls --disable-werror --disable-multilib
make
make install
構建天然GCC:
cd ${ROOTDIR}/src/gcc-6.3.0
ln -s ../mpfr-3.1.5 mpfr
ln -s ../gmp-6.1.2 gmp
ln -s ../mpc-1.0.3 mpc
cd ..
mkdir build-gcc
cd build-gcc
../gcc-6.3.0/configure --prefix=${NATIVE_PREFIX} --disable-nls --enable-languages=c --disable-multilib
make
make install
構建跨binutils的:
cd ${ROOTDIR}/src
mkdir build-${CPU}-binutils
cd build-${CPU}-binutils
../binutils-2.27/configure --target=${TARGET_TRIPLET} --prefix=${CROSS_PREFIX} --with-sysroot --disable-nls --disable-werror --disable-multilib
make
make install
安裝內核頭:
cd ${ROOTDIR}/src
cd linux-3.12.6
make ARCH=${TARGET_MACHINE} INSTALL_HDR_PATH=${CROSS_PREFIX}/${TARGET_TRIPLET} headers_install
構建跨GCC(階段1)
cd ${ROOTDIR}/src
mkdir build-bootstrap-${CPU}-gcc
cd build-bootstrap-${CPU}-gcc
../gcc-6.3.0/configure --target=${TARGET_TRIPLET} --prefix=${CROSS_PREFIX} --disable-nls --enable-languages=c --disable-multilib --disable-threads --disable-shared --with-float=soft --with-arch=${ARCH}
make all-gcc install-gcc
make all-target-libgcc install-target-libgcc
構建橫截面, MUSL
cd ${ROOTDIR}/src
mkdir build-${CLIB}
cd build-${CLIB}
CC=${TARGET_TRIPLET}-gcc CFLAGS=-Wa,-msoft-float ../musl-1.1.16/configure --prefix=${CROSS_PREFIX}/${TARGET_TRIPLET}/ --enable-optimize CROSS_COMPILE=${TARGET_TRIPLET}-
make
make install
構建跨海灣合作委員會(階段2)
cd ${ROOTDIR}/src
mkdir build-${CPU}-gcc
cd build-${CPU}-gcc
../gcc-6.3.0/configure --target=${TARGET_TRIPLET} --prefix=${CROSS_PREFIX} --disable-nls --enable-languages=c,c++ --disable-multilib --enable-threads --enable-shared --with-float=soft --with-arch=${ARCH} --enable-target-optspace --disable-libgomp --disable-libmudflap --without-isl --without-cloog --disable-decimal-float --disable-libssp --disable-libsanitizer --enable-lto --with-host-libstdcxx=-lstdc++
make
make install
感謝您對您的所有意見提前!