title: c compiler cannot create executable on mac
body: <p>Everytime I try to install a package or software on my mac (Maverick) from a config file, it automatically fails when checking the C compiler. It says "configure: error: C compiler cannot create executables". Besides, Homebrew works perfectly. I attached an example of config.log. I haven't found any satisfaction in the related previous posts, I apologize if the issue was solved.</p>
  
  <pre><code>## ----------- ##
  ## Core tests. ##
  ## ----------- ##
  
  configure:2530: checking for gcc
  configure:2546: found /usr/local/bin/gcc
  configure:2557: result: gcc
  configure:2786: checking for C compiler version
  configure:2795: gcc --version &gt;&amp;5
  gcc (GCC) 4.8.0 20130113 (experimental)
  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.
  
  configure:2806: $? = 0
  configure:2795: gcc -v &gt;&amp;5
  Using built-in specs.
  COLLECT_GCC=gcc
  COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-apple-darwin12.2.0/4.8.0/lto-wrapper
  Target: x86_64-apple-darwin12.2.0
  Configured with: ../gcc-4.8-20130113/configure --enable-languages=c++,fortran
  Thread model: posix
  gcc version 4.8.0 20130113 (experimental) (GCC) 
  configure:2806: $? = 0
  configure:2795: gcc -V &gt;&amp;5
  gcc: error: unrecognized command line option '-V'
  gcc: fatal error: no input files
  compilation terminated.
  configure:2806: $? = 1
  configure:2795: gcc -qversion &gt;&amp;5
  gcc: error: unrecognized command line option '-qversion'
  gcc: fatal error: no input files
  compilation terminated.
  configure:2806: $? = 1
  configure:2826: checking whether the C compiler works
  configure:2848: gcc    conftest.c  &gt;&amp;5
  ld: library not found for -lgcc_ext.10.5
  collect2: error: ld returned 1 exit status
  configure:2852: $? = 1
  configure:2890: result: no
  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:2895: error: in `/Users/amidou/miriad_cvs':
  configure:2897: error: C compiler cannot create executables
  See `config.log' for more details
  </code></pre>
  
  <p>My Xcode version is 5.1, and I have the command line installed. Thanks in advance.</p>