could help me to fix the problem when install the gcc-7.2

[Chen tom <tomcp85 at hotmail dot com>]

hello,

the following quotation is the problem,  when I did the 'configure', it  
comes out. The 'config.log' is in the attachment.

> tom@tom-Inspiron-7447:~/Downloads/gcc-7.2.0$ sudo ./configure 
> --prefix=/usr/local/gcc
> checking build system type... x86_64-pc-linux-gnu
> checking host system type... x86_64-pc-linux-gnu
> checking target system type... x86_64-pc-linux-gnu
> checking for a BSD-compatible install... /usr/bin/install -c
> checking whether ln works... yes
> checking whether ln -s works... yes
> checking for a sed that does not truncate output... /bin/sed
> checking for gawk... gawk
> checking for libatomic support... yes
> checking for libcilkrts support... yes
> checking for libitm support... yes
> checking for libsanitizer support... yes
> checking for libvtv support... yes
> checking for libmpx support... yes
> checking for libhsail-rt support... yes
> checking for gcc... gcc
> checking for C compiler default output file name...
> configure: error: in `/home/tom/Downloads/gcc-7.2.0':
> configure: error: C compiler cannot create executables
> See `config.log' for more details.

  Hope to hear from you!

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 2.64.  Invocation command line was

  $ ./configure --prefix=/usr/local/gcc

## --------- ##
## Platform. ##
## --------- ##

hostname = tom-Inspiron-7447
uname -m = x86_64
uname -r = 4.10.0-33-generic
uname -s = Linux
uname -v = #37-Ubuntu SMP Fri Aug 11 10:55:28 UTC 2017

/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: /snap/bin


## ----------- ##
## Core tests. ##
## ----------- ##

configure:2304: checking build system type
configure:2318: result: x86_64-pc-linux-gnu
configure:2365: checking host system type
configure:2378: result: x86_64-pc-linux-gnu
configure:2398: checking target system type
configure:2411: result: x86_64-pc-linux-gnu
configure:2465: checking for a BSD-compatible install
configure:2533: result: /usr/bin/install -c
configure:2544: checking whether ln works
configure:2566: result: yes
configure:2570: checking whether ln -s works
configure:2574: result: yes
configure:2581: checking for a sed that does not truncate output
configure:2645: result: /bin/sed
configure:2654: checking for gawk
configure:2670: found /usr/bin/gawk
configure:2681: result: gawk
configure:3175: checking for libatomic support
configure:3185: result: yes
configure:3194: checking for libcilkrts support
configure:3204: result: yes
configure:3232: checking for libitm support
configure:3242: result: yes
configure:3251: checking for libsanitizer support
configure:3261: result: yes
configure:3270: checking for libvtv support
configure:3280: result: yes
configure:3290: checking for libmpx support
configure:3300: result: yes
configure:3309: checking for libhsail-rt support
configure:3321: result: yes
configure:4038: checking for gcc
configure:4054: found /usr/local/bin/gcc
configure:4065: result: gcc
configure:4294: checking for C compiler version
configure:4303: gcc --version >&5
gcc (GCC) 8.0.0 20170912 (experimental)
Copyright (C) 2017 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.

configure:4314: $? = 0
configure:4303: gcc -v >&5
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure
Thread model: posix
gcc version 8.0.0 20170912 (experimental) (GCC) 
configure:4314: $? = 0
configure:4303: gcc -V >&5
gcc: error: unrecognized command line option '-V'
gcc: fatal error: no input files
compilation terminated.
configure:4314: $? = 1
configure:4303: gcc -qversion >&5
gcc: error: unrecognized command line option '-qversion'; did you mean '--version'?
gcc: fatal error: no input files
compilation terminated.
configure:4314: $? = 1
configure:4334: checking for C compiler default output file name
configure:4356: gcc    conftest.c  >&5
/usr/bin/ld: cannot find crtbegin.o: No such file or directory
/usr/bin/ld: cannot find -lgcc
/usr/bin/ld: cannot find -lgcc
collect2: error: ld returned 1 exit status
configure:4360: $? = 1
configure:4397: result: 
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME ""
| #define PACKAGE_TARNAME ""
| #define PACKAGE_VERSION ""
| #define PACKAGE_STRING ""
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL ""
| /* end confdefs.h.  */
| 
| int
| main ()
| {
| 
|   ;
|   return 0;
| }
configure:4403: error: in `/home/tom/Downloads/gcc-7.2.0':
configure:4407: error: C compiler cannot create executables
See `config.log' for more details.

## ---------------- ##
## Cache variables. ##
## ---------------- ##

ac_cv_build=x86_64-pc-linux-gnu
ac_cv_env_AR_FOR_TARGET_set=
ac_cv_env_AR_FOR_TARGET_value=
ac_cv_env_AR_set=
ac_cv_env_AR_value=
ac_cv_env_AS_FOR_TARGET_set=
ac_cv_env_AS_FOR_TARGET_value=
ac_cv_env_AS_set=
ac_cv_env_AS_value=
ac_cv_env_CCC_set=
ac_cv_env_CCC_value=
ac_cv_env_CC_FOR_TARGET_set=
ac_cv_env_CC_FOR_TARGET_value=
ac_cv_env_CC_set=
ac_cv_env_CC_value=
ac_cv_env_CFLAGS_set=
ac_cv_env_CFLAGS_value=
ac_cv_env_CPPFLAGS_set=
ac_cv_env_CPPFLAGS_value=
ac_cv_env_CXXFLAGS_set=
ac_cv_env_CXXFLAGS_value=
ac_cv_env_CXX_FOR_TARGET_set=
ac_cv_env_CXX_FOR_TARGET_value=
ac_cv_env_CXX_set=
ac_cv_env_CXX_value=
ac_cv_env_DLLTOOL_FOR_TARGET_set=
ac_cv_env_DLLTOOL_FOR_TARGET_value=
ac_cv_env_DLLTOOL_set=
ac_cv_env_DLLTOOL_value=
ac_cv_env_GCC_FOR_TARGET_set=
ac_cv_env_GCC_FOR_TARGET_value=
ac_cv_env_GFORTRAN_FOR_TARGET_set=
ac_cv_env_GFORTRAN_FOR_TARGET_value=
ac_cv_env_GOC_FOR_TARGET_set=
ac_cv_env_GOC_FOR_TARGET_value=
ac_cv_env_LDFLAGS_set=
ac_cv_env_LDFLAGS_value=
ac_cv_env_LD_FOR_TARGET_set=
ac_cv_env_LD_FOR_TARGET_value=
ac_cv_env_LD_set=
ac_cv_env_LD_value=
ac_cv_env_LIBS_set=
ac_cv_env_LIBS_value=
ac_cv_env_LIPO_FOR_TARGET_set=
ac_cv_env_LIPO_FOR_TARGET_value=
ac_cv_env_LIPO_set=
ac_cv_env_LIPO_value=
ac_cv_env_NM_FOR_TARGET_set=
ac_cv_env_NM_FOR_TARGET_value=
ac_cv_env_NM_set=
ac_cv_env_NM_value=
ac_cv_env_OBJCOPY_FOR_TARGET_set=
ac_cv_env_OBJCOPY_FOR_TARGET_value=
ac_cv_env_OBJCOPY_set=
ac_cv_env_OBJCOPY_value=
ac_cv_env_OBJDUMP_FOR_TARGET_set=
ac_cv_env_OBJDUMP_FOR_TARGET_value=
ac_cv_env_OBJDUMP_set=
ac_cv_env_OBJDUMP_value=
ac_cv_env_RANLIB_FOR_TARGET_set=
ac_cv_env_RANLIB_FOR_TARGET_value=
ac_cv_env_RANLIB_set=
ac_cv_env_RANLIB_value=
ac_cv_env_READELF_FOR_TARGET_set=
ac_cv_env_READELF_FOR_TARGET_value=
ac_cv_env_READELF_set=
ac_cv_env_READELF_value=
ac_cv_env_STRIP_FOR_TARGET_set=
ac_cv_env_STRIP_FOR_TARGET_value=
ac_cv_env_STRIP_set=
ac_cv_env_STRIP_value=
ac_cv_env_WINDMC_FOR_TARGET_set=
ac_cv_env_WINDMC_FOR_TARGET_value=
ac_cv_env_WINDMC_set=
ac_cv_env_WINDMC_value=
ac_cv_env_WINDRES_FOR_TARGET_set=
ac_cv_env_WINDRES_FOR_TARGET_value=
ac_cv_env_WINDRES_set=
ac_cv_env_WINDRES_value=
ac_cv_env_build_alias_set=
ac_cv_env_build_alias_value=
ac_cv_env_build_configargs_set=
ac_cv_env_build_configargs_value=
ac_cv_env_host_alias_set=
ac_cv_env_host_alias_value=
ac_cv_env_host_configargs_set=
ac_cv_env_host_configargs_value=
ac_cv_env_target_alias_set=
ac_cv_env_target_alias_value=
ac_cv_env_target_configargs_set=
ac_cv_env_target_configargs_value=
ac_cv_host=x86_64-pc-linux-gnu
ac_cv_path_SED=/bin/sed
ac_cv_path_install='/usr/bin/install -c'
ac_cv_prog_AWK=gawk
ac_cv_prog_ac_ct_CC=gcc
ac_cv_target=x86_64-pc-linux-gnu
acx_cv_prog_LN=ln

## ----------------- ##
## Output variables. ##
## ----------------- ##

AR=''
AR_FOR_BUILD='$(AR)'
AR_FOR_TARGET=''
AS=''
AS_FOR_BUILD='$(AS)'
AS_FOR_TARGET=''
AWK='gawk'
BISON=''
BUILD_CONFIG=''
CC='gcc'
CC_FOR_BUILD='$(CC)'
CC_FOR_TARGET=''
CFLAGS=''
CFLAGS_FOR_BUILD=''
CFLAGS_FOR_TARGET=''
COMPILER_AS_FOR_TARGET=''
COMPILER_LD_FOR_TARGET=''
COMPILER_NM_FOR_TARGET=''
CONFIGURE_GDB_TK=''
CPPFLAGS=''
CXX=''
CXXFLAGS=''
CXXFLAGS_FOR_BUILD=''
CXXFLAGS_FOR_TARGET=''
CXX_FOR_BUILD='$(CXX)'
CXX_FOR_TARGET=''
DEBUG_PREFIX_CFLAGS_FOR_TARGET=''
DEFS=''
DLLTOOL=''
DLLTOOL_FOR_BUILD='$(DLLTOOL)'
DLLTOOL_FOR_TARGET=''
ECHO_C=''
ECHO_N='-n'
ECHO_T=''
EXEEXT=''
EXPECT=''
FLAGS_FOR_TARGET=''
FLEX=''
GCC_FOR_TARGET=''
GCC_SHLIB_SUBDIR=''
GDB_TK=''
GFORTRAN_FOR_BUILD='$(GFORTRAN)'
GFORTRAN_FOR_TARGET=''
GNATBIND=''
GNATMAKE=''
GOC_FOR_BUILD='$(GOC)'
GOC_FOR_TARGET=''
INSTALL_DATA='${INSTALL} -m 644'
INSTALL_GDB_TK=''
INSTALL_PROGRAM='${INSTALL}'
INSTALL_SCRIPT='${INSTALL}'
LD=''
LDFLAGS=''
LDFLAGS_FOR_BUILD=''
LDFLAGS_FOR_TARGET=''
LD_FOR_BUILD='$(LD)'
LD_FOR_TARGET=''
LEX=''
LIBOBJS=''
LIBS=''
LIPO=''
LIPO_FOR_TARGET=''
LN='ln'
LN_S='ln -s'
LTLIBOBJS=''
M4=''
MAINT=''
MAINTAINER_MODE_FALSE=''
MAINTAINER_MODE_TRUE=''
MAKEINFO=''
NM=''
NM_FOR_BUILD='$(NM)'
NM_FOR_TARGET=''
OBJCOPY=''
OBJCOPY_FOR_TARGET=''
OBJDUMP=''
OBJDUMP_FOR_TARGET=''
OBJEXT=''
PACKAGE_BUGREPORT=''
PACKAGE_NAME=''
PACKAGE_STRING=''
PACKAGE_TARNAME=''
PACKAGE_URL=''
PACKAGE_VERSION=''
PATH_SEPARATOR=':'
RANLIB=''
RANLIB_FOR_BUILD='$(RANLIB)'
RANLIB_FOR_TARGET=''
RAW_CXX_FOR_TARGET=''
READELF=''
READELF_FOR_TARGET=''
RPATH_ENVVAR=''
RUNTEST=''
SED='/bin/sed'
SHELL='/bin/bash'
STRIP=''
STRIP_FOR_TARGET=''
SYSROOT_CFLAGS_FOR_TARGET=''
TOPLEVEL_CONFIGURE_ARGUMENTS='./configure --prefix=/usr/local/gcc'
WINDMC=''
WINDMC_FOR_BUILD='$(WINDMC)'
WINDMC_FOR_TARGET=''
WINDRES=''
WINDRES_FOR_BUILD='$(WINDRES)'
WINDRES_FOR_TARGET=''
YACC=''
ac_ct_CC='gcc'
ac_ct_CXX=''
bindir='${exec_prefix}/bin'
build='x86_64-pc-linux-gnu'
build_alias=''
build_configargs=''
build_configdirs='build-libiberty build-libcpp build-texinfo build-flex build-bison build-m4 build-fixincludes'
build_cpu='x86_64'
build_libsubdir='build-x86_64-pc-linux-gnu'
build_noncanonical='x86_64-pc-linux-gnu'
build_os='linux-gnu'
build_subdir='build-x86_64-pc-linux-gnu'
build_tooldir=''
build_vendor='pc'
compare_exclusions=''
configdirs='intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools'
datadir='${datarootdir}'
datarootdir='${prefix}/share'
do_compare=''
docdir='${datarootdir}/doc/${PACKAGE}'
dvidir='${docdir}'
exec_prefix='NONE'
extra_host_libiberty_configure_flags=''
extra_host_zlib_configure_flags=''
extra_isl_gmp_configure_flags=''
extra_liboffloadmic_configure_flags=''
extra_linker_plugin_configure_flags=''
extra_linker_plugin_flags=''
extra_mpc_gmp_configure_flags=''
extra_mpc_mpfr_configure_flags=''
extra_mpfr_configure_flags=''
get_gcc_base_ver=''
gmpinc=''
gmplibs=''
host='x86_64-pc-linux-gnu'
host_alias=''
host_configargs=''
host_cpu='x86_64'
host_noncanonical='x86_64-pc-linux-gnu'
host_os='linux-gnu'
host_shared=''
host_subdir='host-x86_64-pc-linux-gnu'
host_vendor='pc'
htmldir='${docdir}'
includedir='${prefix}/include'
infodir='${datarootdir}/info'
islinc=''
isllibs=''
libdir='${exec_prefix}/lib'
libexecdir='${exec_prefix}/libexec'
localedir='${datarootdir}/locale'
localstatedir='${prefix}/var'
mandir='${datarootdir}/man'
oldincludedir='/usr/include'
pdfdir='${docdir}'
poststage1_ldflags=''
poststage1_libs=''
prefix='/usr/local/gcc'
program_transform_name='s,y,y,'
psdir='${docdir}'
sbindir='${exec_prefix}/sbin'
sharedstatedir='${prefix}/com'
stage1_cflags=''
stage1_checking=''
stage1_languages=''
stage1_ldflags=''
stage1_libs=''
stage2_werror_flag=''
sysconfdir='${prefix}/etc'
target='x86_64-pc-linux-gnu'
target_alias=''
target_configargs=''
target_configdirs='target-libgcc target-libbacktrace target-libgloss target-newlib target-libgomp target-libcilkrts target-liboffloadmic target-libhsail-rt target-libatomic target-libitm target-libstdc++-v3 target-libsanitizer target-libvtv target-libmpx target-libssp target-libquadmath target-libgfortran target-libffi target-libobjc target-libada target-libgo target-rda'
target_cpu='x86_64'
target_noncanonical='x86_64-pc-linux-gnu'
target_os='linux-gnu'
target_subdir='x86_64-pc-linux-gnu'
target_vendor='pc'
tooldir=''

## ------------------- ##
## File substitutions. ##
## ------------------- ##

alphaieee_frag=''
host_makefile_frag='/dev/null'
ospace_frag=''
serialization_dependencies=''
target_makefile_frag=''

## ----------- ##
## confdefs.h. ##
## ----------- ##

/* confdefs.h */
#define PACKAGE_NAME ""
#define PACKAGE_TARNAME ""
#define PACKAGE_VERSION ""
#define PACKAGE_STRING ""
#define PACKAGE_BUGREPORT ""
#define PACKAGE_URL ""

configure: exit 77