From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755475AbbI1CWZ (ORCPT ); Sun, 27 Sep 2015 22:22:25 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:27744 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753602AbbI1CWY (ORCPT ); Sun, 27 Sep 2015 22:22:24 -0400 Message-ID: <5608A427.1060101@huawei.com> Date: Mon, 28 Sep 2015 10:21:27 +0800 From: "long.wanglong" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20121010 Thunderbird/16.0.1 MIME-Version: 1.0 To: "Bird, Tim" , CC: peifeiyue , "linux-kernel@vger.kernel.org" Subject: Re: Can you give me a suggestion for how to compile size kselftest? References: <56036D67.2040807@huawei.com> In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.111.152.157] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2015/9/25 4:02, Bird, Tim wrote: > On Wednesday, September 23, 2015 8:26 PM, long.wanglong [long.wanglong@huawei.com] wrote: >> >> Hi, tim >> >> Could you help me with the following problem? >> >> On my x86_64 system, I can not compile the size kselftest, the output is: >> >> for TARGET in size; do \ >> make -C $TARGET; \ >> done; >> make[2]: Entering directory `/home/wanglong/linux-mainline/tools/testing/selftests/size' >> gcc -static -ffreestanding -nostartfiles -s get_size.c -o get_size >> /usr/bin/ld: cannot find -lc >> collect2: error: ld returned 1 exit status >> make[2]: *** [get_size] Error 1 >> make[2]: Leaving directory `/home/wanglong/linux-mainline/tools/testing/selftests/size' >> make[1]: *** [all] Error 2 >> make: *** [kselftest] Error 2 >> >> >> But, with the following command: >> # cd tools/testing/selftests/size >> # gcc -ffreestanding -nostartfiles -s get_size.c -o get_size >> its ok. >> >> My GCC is: >> >> $ gcc -v >> Using built-in specs. >> COLLECT_GCC=gcc >> COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.3/lto-wrapper >> Target: x86_64-redhat-linux >> Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.3-20140911/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.3-20140911/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux >> Thread model: posix >> gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) >> >> >> I google `/usr/bin/ld: cannot find -lc`, but it did not help me more. >> >> Could you please help me? > > The problem is that you are missing the version of the C library for static linking. This should be in one of > your C library directories, with the name libc.a (not libc.so, which is the shared object library for dynamic linking). > Sometimes the static libraries are built as separate packages. > > > It looks like you need to install the 'glibc-static' development package. > > See http://rpmfind.net//linux/RPM/fedora/devel/rawhide/x86_64/g/glibc-static-2.22.90-6.fc24.x86_64.html > > Let me know if that solves the problem for you (or not). > -- Tim Hi Tim, Thanks for you reply. The reason I can not compile successfully is that, so far, the kselftests does not support -O option. When I compile kernel without -O option, the size unit test can compile successfully. so I hope the kselftests will support standard kernel options: 1）Separate out directory （KBUILD_OUTPUT support） 2）Verbose vs quiet building （V=1 support） Best Regards Wang Long > > . >