Just glancing at the output, it appears to be finding a different gcc that 
isn't Lion compatible. I know people have been forgetting to clear out all 
their old installed software, and so you can pick old things up.

Try setting your path and ld_library_path variables to point at the Xcode gcc.


On Nov 4, 2011, at 3:08 PM, Charles Shelor wrote:

> I had downloaded and installed OpenMPI on my Mac OS-X 10.6 machine a few 
> months ago.  I ran the configure and install commands from the FAQ with no 
> problems.  I recently upgraded to Max OS-X 10.7 (Lion) and now when I run 
> mpicc it cannot find the standard C library headers (stdio.h, std lib.h…)  I 
> had noticed that I had to modify my path to point to the Xcode gcc 
> executable, /Developer/usr/bin/gcc, (I believe 10.6 included gcc in /usr/bin, 
> but 10.7 does not appear to include it there now).  So I figured that I could 
> just reinstall OpenMPI and it would be able to locate the new libraries.  
> However, during the "configure" operation I received the messages below.  I 
> normally use the Apple Xcode IDE for my initial code development and then 
> compile using mpicc from a terminal window.  gcc also fails to find the 
> standard libraries from the command line.  Is there an environment variable 
> that I should set that tells gcc where the libraries are located?
> 
> Thank you!
> 
> Charles
> 
> 
> ============================================================================
> == Compiler and preprocessor tests
> ============================================================================
> 
> *** C compiler and preprocessor
> checking for style of include used by make... GNU
> checking for gcc... gcc
> checking for C compiler default output file name... 
> configure: error: in `/Downloads/openmpi-1.4.3':
> configure: error: C compiler cannot create executables
> See `config.log' for more details.
> 
> 
> 
> Here is what I think is the relevant output from 'config.log'
> 
> 
> 
> configure:6362: $? = 0
> configure:6369: gcc -v >&5
> Using built-in specs.
> Target: i686-apple-darwin10
> Configured with: /var/tmp/gcc/gcc-5666.3~6/src/configure --disable-checking 
> --enable-werror --prefix=/usr --mandir=/share/man 
> --enable-languages=c,objc,c++,obj-c++ 
> --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib 
> --build=i686-apple-darwin10 --program-prefix=i686-apple-darwin10- 
> --host=x86_64-apple-darwin10 --target=i686-apple-darwin10 
> --with-gxx-include-dir=/include/c++/4.2.1
> Thread model: posix
> gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)
> configure:6373: $? = 0
> configure:6380: gcc -V >&5
> gcc-4.2: argument to `-V' is missing
> configure:6384: $? = 1
> configure:6407: checking for C compiler default output file name
> configure:6429: gcc -DNDEBUG    conftest.c  >&5
> ld: library not found for -lcrt1.10.6.o
> collect2: ld returned 1 exit status
> configure:6433: $? = 1
> configure:6471: result: 
> configure: failed program was:
> | /* confdefs.h.  */
> | #define PACKAGE_NAME "Open MPI"
> | #define PACKAGE_TARNAME "openmpi"
> | #define PACKAGE_VERSION "1.4.3"
> | #define PACKAGE_STRING "Open MPI 1.4.3"
> | #define PACKAGE_BUGREPORT "http://www.open-mpi.org/community/help/";
> | #define OMPI_MAJOR_VERSION 1
> | #define OMPI_MINOR_VERSION 4
> | #define OMPI_RELEASE_VERSION 3
> | #define OMPI_GREEK_VERSION ""
> | #define OMPI_VERSION "3"
> | #define OMPI_RELEASE_DATE "Oct 05, 2010"
> | #define ORTE_MAJOR_VERSION 1
> | #define ORTE_MINOR_VERSION 4
> | #define ORTE_RELEASE_VERSION 3
> | #define ORTE_GREEK_VERSION ""
> | #define ORTE_VERSION "3"
> | #define ORTE_RELEASE_DATE "Oct 05, 2010"
> | #define OPAL_MAJOR_VERSION 1
> | #define OPAL_MINOR_VERSION 4
> | #define OPAL_RELEASE_VERSION 3
> | #define OPAL_GREEK_VERSION ""
> | #define OPAL_VERSION "3"
> | #define OPAL_RELEASE_DATE "Oct 05, 2010"
> | #define OMPI_ENABLE_PROGRESS_THREADS 0
> | #define OMPI_ARCH "x86_64-apple-darwin11.2.0"
> | #define OMPI_ENABLE_MEM_DEBUG 0
> | #define OMPI_ENABLE_MEM_PROFILE 0
> | #define OMPI_ENABLE_DEBUG 0
> | #define OMPI_GROUP_SPARSE 0
> | #define OMPI_WANT_MPI_CXX_SEEK 1
> | #define MPI_PARAM_CHECK ompi_mpi_param_check
> | #define OMPI_WANT_PRETTY_PRINT_STACKTRACE 1
> | #define OMPI_WANT_PERUSE 0
> | #define OMPI_ENABLE_PTY_SUPPORT 1
> | #define OMPI_ENABLE_HETEROGENEOUS_SUPPORT 0
> | #define OPAL_ENABLE_TRACE 0
> | #define ORTE_DISABLE_FULL_SUPPORT 0
> | #define OPAL_ENABLE_FT 0
> | #define OPAL_ENABLE_FT_CR 0
> | #define OMPI_WANT_HOME_CONFIG_FILES 1
> | #define OPAL_ENABLE_IPV6 1
> | #define ORTE_WANT_ORTERUN_PREFIX_BY_DEFAULT 0
> | #define OPAL_PACKAGE_STRING "Open MPI charles@Charles.local Distribution"
> | #define OPAL_IDENT_STRING "1.4.3"
> | #define OMPI_OPENIB_PAD_HDR 0
> | /* end confdefs.h.  */
> | 
> | int
> | main ()
> | {
> | 
> |   ;
> |   return 0;
> | }
> configure:6477: error: in `/Downloads/openmpi-1.4.3':
> configure:6480: error: C compiler cannot create executables
> See `config.log' for more details.
> 
> 
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