for prefetch and branch prediction work. A non-happy compiler could
just think these were functions and we wouldn't get the error, because
we didn't try to link.
Refs trac:287
This commit was SVN r11333.
The following Trac tickets were found above:
Ticket 287 --> https://svn.open-mpi.org/trac/ompi/ticket/287
before checking if we are able to compile the test program. This is required
for windows as the C++ conftest.c file generated by configure cannot be
compiled with the Microsoft cl.exe compiler (because of the exit function
prototype). So if we detect a vendor equal to microsoft we will assume
that the compiler is correctly installed (which is true on Windows most
of the time anyway).
This commit was SVN r11268.
releases on Linux and OS X) don't handle const_cast<> of 2-dimensional
arrays properly. If we're using one of the compilers that isn't friendly
to such casts, fall back to a standard C-style cast.
refs: #271
This commit was SVN r11263.
We have repeatedly seen users inadvertantly try to use a C compiler
for $CXX (e.g., using icc instead of icpc in recent versions of the
Intel compiler). Unfortunately, this would "sorta work", meaning that
configure would complete successfully and the build would fail much
later in the process (when $CXX was used to try to link a C++
compiler). This was further compounded by the fact that many C
compilers will switch into "C++ mode" when they compile files that end
in .cc -- meaning that they'll *compile* C++ codes properly, but they
won't *link* properly. Hence, users would get all the way down to
compiling the C++ MPI bindings or ompi_info (i.e., very late in the
build process) before the problem became evident.
We already have a test in configure that tries to compile, link, and
run a sample C++ program. This helped ensure that $CXX was a valid
compiler, but it did not catch if the user accidentally supplied a C
compiler instead of a C++ compiler because the test program was simply
"return 0". This commit updates the test program to use some
C++-specific constructs (std::string) so that if the user supplies a C
compiler in $CXX, the program may *compile*, but it will definitely
fail to *link*.
Hence, the process will fail early in configure (with a descriptive
message about how the compiler failed to work properly) rather than
late in the build.
This commit was SVN r10829.
are 3 arguments: the pointer to the memory location to prefetch, the type of
operation that will be done on the memory (read or write) and the expected
locality.
This commit was SVN r10294.
whether an if statement is likely to be taken and for prefetching memory.
Current macros:
OPAL_LIKELY(expression)
OPAL_UNLIKELY(expression)
OPAL_PREFETC(address)
This commit was SVN r10278.
situations) before going on to tests that run executables with the
compiler. Print a friendly error message if it fails. Hopefully, this
will help people with borked compilers.
This commit was SVN r8898.
C / C++ tests now use the caching scheme. Only exception is C++ exception
handling code, which is disabled by default, so I'm not too worried about making
that configure faster :)
This commit was SVN r7403.
of flags to configure. Now don't need to specify the contrib/platform
part of the path if you don't want to
* Add "optimized" platform setting that will undo all the performance-
affecting things that a developer build sets up.
This commit was SVN r6946.
having it in config/ompi_setup_cxx.m4
2. Adding --enable-coverage option. This will add teh flags -ftest-coverage
and -fprofile-arcs to the flags. Also, one needs to compile with
debug and static only to enable code coverage
3. Adding the coverage flag options to WRAPPER_*_FLAGS so that mpicc and co.,
will add these to teh executables when they are compiled
This commit was SVN r5416.
