configuration：错误：C编译器无法创build可执行文件，同时从源代码构buildruby

我已经检查了一些类似的问题在stackoverflow，但还没有find答案。

我正在尝试从源代码构buildRuby： https ： //www.ruby-lang.org/en/installation/#building-from-source

在这里，我得到：

ubuntu@saucy1:~/ruby-2.1.1$ ./configure checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking target system type... x86_64-unknown-linux-gnu checking for gcc... gcc checking whether the C compiler works... no configure: error: in `/home/ubuntu/ruby-2.1.1': configure: error: C compiler cannot create executables See `config.log' for more details 

更新：

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该系统是全新的，我使用的是Ubuntu 13.10的云映像，从http://uec-images.ubuntu.com/saucy/current/saucy-server-cloudimg-amd64-disk1.img下载

我用开放的堆栈软件制作了这个云虚拟机。

我通过这个命令安装了gcc：

 sudo apt-get install gcc 

当前版本的gcc：

 #gcc -v Using built-in specs. gcc: error: missing argument to '-march=' COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.8.1-10ubuntu9' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9) 

编辑：

 ubuntu@saucy1:~$ echo CFLAGS=$CFLAGS CFLAGS= ubuntu@saucy1:~$ echo CC=$CC CC= ubuntu@saucy1:~$ gcc -dumpmachine x86_64-linux-gnu ubuntu@saucy1:~$ gcc -dumpspecs *cc1_cpu: %{march=native:%>march=native %:local_cpu_detect(arch) %{!mtune=*:%>mtune=native %:local_cpu_detect(tune)}} %{mtune=native:%>mtune=native %:local_cpu_detect(tune)} 

编辑：

 ubuntu@saucy1:~/ruby-2.1.1$ ./configure CFLAGS="-march=x86-64 -mtune=x86-64" checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking target system type... x86_64-unknown-linux-gnu checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... no checking for gcc option to accept ISO C89... none needed checking for g++... no checking for c++... no checking for gpp... no checking for aCC... no checking for CC... no checking for cxx... no checking for cc++... no checking for cl.exe... no checking for FCC... no checking for KCC... no checking for RCC... no checking for xlC_r... no checking for xlC... no checking whether we are using the GNU C++ compiler... no checking whether g++ accepts -g... no checking how to run the C preprocessor... /lib/cpp configure: error: in `/home/ubuntu/ruby-2.1.1': configure: error: C preprocessor "/lib/cpp" fails sanity check See `config.log' for more details 

这里是更新config.log

 This file contains any messages produced by compilers while running configure, to aid debugging if configure makes a mistake. It was created by configure, which was generated by GNU Autoconf 2.69. Invocation command line was $ ./configure CFLAGS=-march=native -mtune=native ## --------- ## ## Platform. ## ## --------- ## hostname = saucy1 uname -m = x86_64 uname -r = 3.11.0-15-generic uname -s = Linux uname -v = #25-Ubuntu SMP Thu Jan 30 17:22:01 UTC 2014 /usr/bin/uname -p = unknown /bin/uname -X = unknown /bin/arch = unknown /usr/bin/arch -k = unknown /usr/convex/getsysinfo = unknown /usr/bin/hostinfo = unknown /bin/machine = unknown /usr/bin/oslevel = unknown /bin/universe = unknown PATH: /usr/local/sbin PATH: /usr/local/bin PATH: /usr/sbin PATH: /usr/bin PATH: /sbin PATH: /bin PATH: /usr/games PATH: /usr/local/games ## ----------- ## ## Core tests. ## ## ----------- ## configure:2904: checking build system type configure:2918: result: x86_64-unknown-linux-gnu configure:3018: checking host system type configure:3031: result: x86_64-unknown-linux-gnu configure:3051: checking target system type configure:3064: result: x86_64-unknown-linux-gnu configure:3544: checking for gcc configure:3560: found /usr/bin/gcc configure:3571: result: gcc configure:3800: checking for C compiler version configure:3809: gcc --version >&5 gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1 Copyright (C) 2013 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. gcc: error: missing argument to '-march=' configure:3820: $? = 0 configure:3809: gcc -v >&5 Using built-in specs. gcc: error: missing argument to '-march=' COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.8.1-10ubuntu9' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9) configure:3820: $? = 0 configure:3809: gcc -V >&5 gcc: error: missing argument to '-march=' gcc: error: unrecognized command line option '-V' gcc: fatal error: no input files compilation terminated. configure:3820: $? = 4 configure:3809: gcc -qversion >&5 gcc: error: missing argument to '-march=' gcc: error: unrecognized command line option '-qversion' gcc: fatal error: no input files compilation terminated. configure:3820: $? = 4 configure:3840: checking whether the C compiler works configure:3862: gcc -march=native -mtune=native conftest.c >&5 configure:3866: $? = 0 configure:3914: result: yes configure:3917: checking for C compiler default output file name configure:3919: result: a.out configure:3925: checking for suffix of executables configure:3932: gcc -o conftest -march=native -mtune=native conftest.c >&5 configure:3936: $? = 0 configure:3958: result: configure:3980: checking whether we are cross compiling configure:3988: gcc -o conftest -march=native -mtune=native conftest.c >&5 configure:3992: $? = 0 configure:3999: ./conftest configure:4003: $? = 0 configure:4018: result: no configure:4023: checking for suffix of object files configure:4045: gcc -c -march=native -mtune=native conftest.c >&5 configure:4049: $? = 0 configure:4070: result: o configure:4074: checking whether we are using the GNU C compiler configure:4093: gcc -c -march=native -mtune=native conftest.c >&5 configure:4093: $? = 0 configure:4102: result: yes configure:4111: checking whether gcc accepts -g configure:4131: gcc -c -g conftest.c >&5 gcc: error: missing argument to '-march=' configure:4131: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | | int | main () | { | | ; | return 0; | } configure:4146: gcc -c conftest.c >&5 gcc: error: missing argument to '-march=' configure:4146: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | | int | main () | { | | ; | return 0; | } configure:4162: gcc -c -g conftest.c >&5 gcc: error: missing argument to '-march=' configure:4162: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | | int | main () | { | | ; | return 0; | } configure:4172: result: no configure:4189: checking for gcc option to accept ISO C89 configure:4252: gcc -c -march=native -mtune=native conftest.c >&5 configure:4252: $? = 0 configure:4265: result: none needed configure:4343: checking for g++ configure:4359: found /usr/bin/g++ configure:4370: result: g++ configure:4397: checking for C++ compiler version configure:4406: g++ --version >&5 g++ (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1 Copyright (C) 2013 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. g++: error: missing argument to '-march=' configure:4417: $? = 0 configure:4406: g++ -v >&5 Using built-in specs. g++: error: missing argument to '-march=' COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.8.1-10ubuntu9' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9) configure:4417: $? = 0 configure:4406: g++ -V >&5 g++: error: missing argument to '-march=' g++: error: unrecognized command line option '-V' g++: fatal error: no input files compilation terminated. configure:4417: $? = 4 configure:4406: g++ -qversion >&5 g++: error: missing argument to '-march=' g++: error: unrecognized command line option '-qversion' g++: fatal error: no input files compilation terminated. configure:4417: $? = 4 configure:4421: checking whether we are using the GNU C++ compiler configure:4440: g++ -c conftest.cpp >&5 g++: error: missing argument to '-march=' configure:4440: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | | int | main () | { | #ifndef __GNUC__ | choke me | #endif | | ; | return 0; | } configure:4449: result: no configure:4458: checking whether g++ accepts -g configure:4478: g++ -c -g conftest.cpp >&5 g++: error: missing argument to '-march=' configure:4478: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | | int | main () | { | | ; | return 0; | } configure:4493: g++ -c conftest.cpp >&5 g++: error: missing argument to '-march=' configure:4493: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | | int | main () | { | | ; | return 0; | } configure:4509: g++ -c -g conftest.cpp >&5 g++: error: missing argument to '-march=' configure:4509: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | | int | main () | { | | ; | return 0; | } configure:4519: result: no configure:4548: checking how to run the C preprocessor configure:4579: gcc -E conftest.c gcc: error: missing argument to '-march=' configure:4579: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4579: gcc -E conftest.c gcc: error: missing argument to '-march=' configure:4579: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4579: gcc -E -traditional-cpp conftest.c gcc: error: missing argument to '-march=' configure:4579: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4579: gcc -E -traditional-cpp conftest.c gcc: error: missing argument to '-march=' configure:4579: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4579: /lib/cpp conftest.c cpp: error: missing argument to '-march=' configure:4579: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4579: /lib/cpp conftest.c cpp: error: missing argument to '-march=' configure:4579: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4618: result: /lib/cpp configure:4638: /lib/cpp conftest.c cpp: error: missing argument to '-march=' configure:4638: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4638: /lib/cpp conftest.c cpp: error: missing argument to '-march=' configure:4638: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define CANONICALIZATION_FOR_MATHN 1 | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4668: error: in `/home/ubuntu/ruby-2.1.1': configure:4670: error: C preprocessor "/lib/cpp" fails sanity check See `config.log' for more details ## ---------------- ## ## Cache variables. ## ## ---------------- ## ac_cv_build=x86_64-unknown-linux-gnu ac_cv_c_compiler_gnu=yes ac_cv_cxx_compiler_gnu=no ac_cv_env_CCC_set= ac_cv_env_CCC_value= ac_cv_env_CC_set= ac_cv_env_CC_value= ac_cv_env_CFLAGS_set=set ac_cv_env_CFLAGS_value='-march=native -mtune=native' ac_cv_env_CPPFLAGS_set= ac_cv_env_CPPFLAGS_value= ac_cv_env_CPP_set= ac_cv_env_CPP_value= ac_cv_env_CXXFLAGS_set= ac_cv_env_CXXFLAGS_value= ac_cv_env_CXX_set= ac_cv_env_CXX_value= ac_cv_env_LDFLAGS_set= ac_cv_env_LDFLAGS_value= ac_cv_env_LIBS_set= ac_cv_env_LIBS_value= ac_cv_env_build_alias_set= ac_cv_env_build_alias_value= ac_cv_env_host_alias_set= ac_cv_env_host_alias_value= ac_cv_env_target_alias_set= ac_cv_env_target_alias_value= ac_cv_host=x86_64-unknown-linux-gnu ac_cv_objext=o ac_cv_prog_CPP=/lib/cpp ac_cv_prog_ac_ct_CC=gcc ac_cv_prog_ac_ct_CXX=g++ ac_cv_prog_cc_c89= ac_cv_prog_cc_g=no ac_cv_prog_cxx_g=no ac_cv_target=x86_64-unknown-linux-gnu ## ----------------- ## ## Output variables. ## ALLOCA='' AR='' ARCHFILE='' ARCH_FLAG='' AS='' ASFLAGS='' BASERUBY='echo executable host ruby is required. use --with-baseruby option.; false' BTESTRUBY='' BUILTIN_ENCOBJS='' BUILTIN_TRANSOBJS='' BUILTIN_TRANSSRCS='' CAPITARGET='' CC='gcc' CCDLFLAGS='' CC_VERSION='' CFLAGS='-march=native -mtune=native' CHDIR='' COMMON_HEADERS='' COMMON_LIBS='' COMMON_MACROS='' COUTFLAG='' CP='' CPP='/lib/cpp' CPPFLAGS='' CPPOUTFILE='' CROSS_COMPILING='' CXX='g++' CXXFLAGS='' DEFS='' DLDFLAGS='' DLDLIBS='' DLEXT2='' DLEXT='' DLLWRAP='' DLNOBJ='' DOT='' DOXYGEN='' DTRACE='' DTRACE_EXT='' DTRACE_GLOMMED_OBJ='' DTRACE_OBJ='' ECHO_C='' ECHO_N='-n' ECHO_T='' EGREP='' ENABLE_SHARED='' ENCOBJS='' EXECUTABLE_EXTS='' EXEEXT='' EXPORT_PREFIX='' EXTDLDFLAGS='' EXTLDFLAGS='' EXTOBJS='' EXTOUT='' EXTSTATIC='' GCC='yes' GNU_LD='' GREP='' INSTALLDOC='' INSTALL_DATA='' INSTALL_PROGRAM='' INSTALL_SCRIPT='' LD='' LDFLAGS='' LDSHARED='' LDSHAREDXX='' LIBEXT='' LIBOBJS='' LIBPATHENV='' LIBPATHFLAG='' LIBRUBY='' LIBRUBYARG='' LIBRUBYARG_SHARED='' LIBRUBYARG_STATIC='' LIBRUBY_A='' LIBRUBY_ALIASES='' LIBRUBY_A_OBJS='' LIBRUBY_DLDFLAGS='' LIBRUBY_LDSHARED='' LIBRUBY_RELATIVE='' LIBRUBY_SO='' LIBS='' LINK_SO='' LN_S='' LTLIBOBJS='' MAINLIBS='' MAJOR='2' MAKEDIRS='' MAKEFILES='' MANTYPE='' MINIOBJS='' MINIRUBY='' MINOR='1' MKDIR_P='' NACL_SDK_ROOT='' NACL_SDK_VARIANT='' NACL_TOOLCHAIN='' NM='' NROFF='' NULLCMD='' OBJCOPY='' OBJDUMP='' OBJEXT='o' OUTFLAG='' PACKAGE='' PACKAGE_BUGREPORT='' PACKAGE_NAME='' PACKAGE_STRING='' PACKAGE_TARNAME='' PACKAGE_URL='' PACKAGE_VERSION='' PATH_SEPARATOR=':' PKG_CONFIG='' PLATFORM_DIR='' POSTLINK='' PREP='' PYTHON='' RANLIB='' RDOCTARGET='' RI_BASE_NAME='' RM='' RMALL='' RMDIR='' RMDIRS='' RPATHFLAG='' RUBYW_BASE_NAME='rubyw' RUBYW_INSTALL_NAME='' RUBY_BASE_NAME='ruby' RUBY_EXEC_PREFIX='' RUBY_INSTALL_NAME='' RUBY_LIB_VERSION='' RUBY_LIB_VERSION_STYLE='' RUBY_PROGRAM_VERSION='2.1.1' RUBY_RELEASE_DATE='2014-02-24' RUBY_SEARCH_PATH='' RUBY_SO_NAME='' RUBY_VERSION_NAME='${RUBY_BASE_NAME}-${ruby_version}' RUNRUBY='' RUNRUBY_COMMAND='' SET_MAKE='' SHELL='/bin/bash' SOLIBS='' STATIC='' STRIP='' SYMBOL_PREFIX='' TEENY='0' TEST_RUNNABLE='' THREAD_MODEL='' TRY_LINK='' UNIVERSAL_ARCHNAMES='' UNIVERSAL_INTS='' USE_RUBYGEMS='' WERRORFLAG='' WINDRES='' XCFLAGS='' XLDFLAGS='' XRUBY='' XRUBY_LIBDIR='' XRUBY_RUBYHDRDIR='' XRUBY_RUBYLIBDIR='' ac_ct_CC='gcc' ac_ct_CXX='g++' ac_ct_OBJCOPY='' ac_ct_OBJDUMP='' arch='' archincludedir='' archlibdir='' bindir='${exec_prefix}/bin' build='x86_64-unknown-linux-gnu' build_alias='' build_cpu='x86_64' build_os='linux-gnu' build_vendor='unknown' cflags='' codesign='' configure_args='' cppflags='' cxxflags=' ${optflags} ${debugflags} ${warnflags}' datadir='${datarootdir}' datarootdir='${prefix}/share' debugflags='' docdir='${datarootdir}/doc/${PACKAGE}' dvidir='${docdir}' exec='' exec_prefix='NONE' host='x86_64-unknown-linux-gnu' host_alias='' host_cpu='x86_64' host_os='linux-gnu' host_vendor='unknown' htmldir='${docdir}' includedir='${prefix}/include' infodir='${datarootdir}/info' libdir='${exec_prefix}/lib' libdirname='' libexecdir='${exec_prefix}/libexec' localedir='${datarootdir}/locale' localstatedir='${prefix}/var' mandir='${datarootdir}/man' oldincludedir='/usr/include' optflags='' pdfdir='${docdir}' prefix='NONE' program_transform_name='s&^&&' psdir='${docdir}' ridir='' ruby_pc='' ruby_version='' rubyarchdir='' rubyarchhdrdir='' rubyarchprefix='' rubyhdrdir='' rubylibdir='' rubylibprefix='' rubysitearchprefix='' rubyw_install_name='' sbindir='${exec_prefix}/sbin' setup='' sharedstatedir='${prefix}/com' sitearch='' sitearchdir='' sitearchhdrdir='' sitearchincludedir='' sitearchlibdir='' sitedir='' sitehdrdir='' sitelibdir='' strict_warnflags='' sysconfdir='${prefix}/etc' target='x86_64-unknown-linux-gnu' target_alias='' target_cpu='x86_64' target_os='linux' target_vendor='unknown' try_header='' vendorarchdir='' vendorarchhdrdir='' vendordir='' vendorhdrdir='' vendorlibdir='' warnflags='' ## ----------- ## ## confdefs.h. ## ## ----------- ## /* confdefs.h */ #define PACKAGE_NAME "" #define PACKAGE_TARNAME "" #define PACKAGE_VERSION "" #define PACKAGE_STRING "" #define PACKAGE_BUGREPORT "" #define PACKAGE_URL "" #define CANONICALIZATION_FOR_MATHN 1 configure: exit 1 

 gcc: error: missing argument to '-march=' gcc: error: unrecognized command line option '-V' 

 echo CFLAGS=$CFLAGS echo CC=$CC 

 gcc -dumpmachine gcc -v 

 gcc -dumpspecs 

 export CFLAGS="-march=x86-64 -mtune=x86-64" 

 gcc -v -march=native -ox hello.c 2>&1 | less ... COLLECT_GCC_OPTIONS='-v' '-march=native' '-o' 'x' /usr/local/libexec/gcc/i686-pc-linux-gnu/4.7.3/cc1 -quiet -v hello.c -march=core2 [...]