Hi, On Fri, Sep 20, 2013 at 02:45:24PM +0800, Li Zhijian wrote: > Hi,all > > I got a big problem when using the cross-toolchain to compile a simple C > program. > This problem since 3ae71c74c71f13a390b21b4c3ead04e51aaa82b8 > which is to upgrade the binutils from 2.22 to 2.23.1 > > what I do is as follows, any help or ideas ? > > I) Build my cross-toolchain > # git clone http://git.yoctoproject.org/git/poky/.git > # cd poky > # git checkout 3ae71c74c71f13a390b21b4c3ead04e51aaa82b8 -b tcmode-default > ...skip some steps... > # bitbake meta-toolchain > Loading cache: 100% > |############################################################################################| > ETA: 00:00:00 > Loaded 1122 entries from dependency cache. > > Build Configuration: > BB_VERSION = "1.17.0" > BUILD_SYS = "x86_64-linux" > NATIVELSBSTRING = "CentOS-6.3" > TARGET_SYS = "x86_64-poky-linux" > MACHINE = "qemux86-64" > DISTRO = "poky" > DISTRO_VERSION = "1.3+snapshot-20130912" > TUNE_FEATURES = "m64" > TARGET_FPU = "" > meta > meta-yocto > meta-yocto-bsp = "tcmode-default:3ae71c74c71f13a390b21b4c3ead04e51aaa82b8" > > ..cost a long time.. > all of the build work successfully > > II) Install my cross-toolchain > # ./poky-eglibc-x86_64-x86_64-toolchain-1.3+snapshot-20130912.sh > Enter target directory for SDK (default: /opt/poky/1.3+snapshot): > toolchain-1.3-tcmode-default > > III) compile a simple C program > # cat test.c > int main () > { > printf("hello world\n"); > return 0; > } > # source toolchain-1.3-tcmode-default/environment-setup-x86_64-poky-linux > # $CC -o test test.c -L tmp/sysroots/qemux86-64/usr/lib/ -lm Technically, for this simple program, it's enough to do:
$CC -o test test.c The $CC contains the sysroot option and the linker will automatically prefix /lib and /usr/lib with the target sysroot. So, it should be able to compile just fine. The -L option just adds another search path for libraries which will be searched before the default ones. So, it shouldn't be a problem. Somehow, it looks like it tries to link against the host's libraries. Before compiling, do a 'echo $CC' and make sure the --sysroot points to the correct directory. Laurentiu > test.c: In function 'main': > test.c:3:9: warning: incompatible implicit declaration of built-in function > 'printf' [enabled by default] > /yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/4.7.2/ld: > skipping incompatible /lib/libc.so.6 when searching for /lib/libc.so.6 > /yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/4.7.2/ld: > cannot find /lib/libc.so.6 > /yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/4.7.2/ld: > skipping incompatible /usr/lib/libc_nonshared.a when searching for > /usr/lib/libc_nonshared.a > /yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/4.7.2/ld: > cannot find /usr/lib/libc_nonshared.a > collect2: error: ld returned 1 exit status > > > #cat toolchain-1.3-tcmode-default/environment-setup-x86_64-poky-linux > export > PATH=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux/usr/bin:/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux:$PATH > export > PKG_CONFIG_SYSROOT_DIR=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux > export > PKG_CONFIG_PATH=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux/usr/lib/pkgconfig > export > CONFIG_SITE=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/site-config-x86_64-poky-linux > export CC="x86_64-poky-linux-gcc -m64 > --sysroot=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux" > export CXX="x86_64-poky-linux-g++ -m64 > --sysroot=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux" > export CPP="x86_64-poky-linux-gcc -E -m64 > --sysroot=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux" > export AS="x86_64-poky-linux-as " > export LD="x86_64-poky-linux-ld > --sysroot=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux" > export GDB=x86_64-poky-linux-gdb > export STRIP=x86_64-poky-linux-strip > export RANLIB=x86_64-poky-linux-ranlib > export OBJCOPY=x86_64-poky-linux-objcopy > export OBJDUMP=x86_64-poky-linux-objdump > export AR=x86_64-poky-linux-ar > export NM=x86_64-poky-linux-nm > export M4=m4 > export TARGET_PREFIX=x86_64-poky-linux- > export CONFIGURE_FLAGS="--target=x86_64-poky-linux --host=x86_64-poky-linux > --build=x86_64-linux > --with-libtool-sysroot=/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux" > export CFLAGS=" -O2 -pipe -g -feliminate-unused-debug-types" > export CXXFLAGS=" -O2 -pipe -g -feliminate-unused-debug-types -fpermissive" > export LDFLAGS="-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed" > export CPPFLAGS="" > export > OECORE_NATIVE_SYSROOT="/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux" > export > OECORE_TARGET_SYSROOT="/yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-poky-linux" > export OECORE_ACLOCAL_OPTS="-I > /yocto/fnst/lizj/build_yocto/x86-64-yocto-1.3/toolchain-1.3-tcmode-default/sysroots/x86_64-pokysdk-linux/usr/share/aclocal" > export OECORE_DISTRO_VERSION="1.3+snapshot-20130912" > export OECORE_SDK_VERSION="1.3+snapshot" > > -- > Best regards. > Li Zhijian (8555) > > > _______________________________________________ > yocto mailing list > yocto@yoctoproject.org > https://lists.yoctoproject.org/listinfo/yocto _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto