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+
+Instructions for the Installation of HDF5 Software
+==================================================
+
+This file provides instructions for installing the HDF5 software.
+If you have any problems with the installation, please see The HDF Group's
+support page at the following location:
+
+ http://www.hdfgroup.org/services/support.html
+
+CONTENTS
+--------
+ 1. Obtaining HDF5
+
+ 2. Quick installation
+ 2.1. Windows
+ 2.2. RedStorm (Cray XT3)
+
+ 3. HDF5 dependencies
+ 3.1. Zlib
+ 3.2 Szip (optional)
+ 3.3. MPI and MPI-IO
+
+ 4. Full installation instructions for source distributions
+ 4.1. Unpacking the distribution
+ 4.1.1. Non-compressed tar archive (*.tar)
+ 4.1.2. Compressed tar archive (*.tar.Z)
+ 4.1.3. Gzip'd tar archive (*.tar.gz)
+ 4.1.4. Bzip'd tar archive (*.tar.bz2)
+ 4.2. Source versus build directories
+ 4.3. Configuring
+ 4.3.1. Specifying the installation directories
+ 4.3.2. Using an alternate C compiler
+ 4.3.3. Configuring for 64-bit support
+ 4.3.4. Additional compilation flags
+ 4.3.5. Compiling HDF5 wrapper libraries
+ 4.3.6. Specifying other programs
+ 4.3.7. Specifying other libraries and headers
+ 4.3.8. Static versus shared linking
+ 4.3.9. Optimization versus symbolic debugging
+ 4.3.10. Parallel versus serial library
+ 4.3.11. Threadsafe capability
+ 4.3.12. Backward compatibility
+ 4.4. Building
+ 4.5. Testing
+ 4.6. Installing HDF5
+
+ 5. Using the Library
+
+ 6. Support
+
+ A. Warnings about compilers
+ A.1. GNU (Intel platforms)
+ A.2. DEC
+ A.3. SGI (Irix64 6.2)
+ A.4. Windows/NT
+
+ B. Large (>2GB) versus small (<2GB) file capability
+
+ C. Building and testing with other compilers
+ C.1. Building and testing with Intel compilers
+ C.2. Building and testing with PGI compilers
+
+*****************************************************************************
+
+1. Obtaining HDF5
+ The latest supported public release of HDF5 is available from
+ ftp://ftp.hdfgroup.org/HDF5/current/src. For Unix and UNIX-like
+ platforms, it is available in tar format compressed with gzip.
+ For Microsoft Windows, it is in ZIP format.
+
+ The HDF team also makes snapshots of the source code available on
+ a regular basis. These snapshots are unsupported (that is, the
+ HDF team will not release a bug-fix on a particular snapshot;
+ rather any bug fixes will be rolled into the next snapshot).
+ Furthermore, the snapshots have only been tested on a few
+ machines and may not test correctly for parallel applications.
+ Snapshots, in a limited number of formats, can be found on THG's
+ development FTP server:
+
+ ftp://ftp.hdfgroup.uiuc.edu/pub/outgoing/hdf5/snapshots
+
+
+2. Quick installation
+ For those who don't like to read ;-) the following steps can be used
+ to configure, build, test, and install the HDF5 Library, header files,
+ and support programs. For example, to install HDF5 version X.Y.Z at
+ location /usr/local/hdf5, use the following steps.
+
+ $ gunzip < hdf5-X.Y.Z.tar.gz | tar xf -
+ $ cd hdf5-X.Y.Z
+ $ ./configure --prefix=/usr/local/hdf5 <more configure_flags>
+ $ make
+ $ make check # run test suite.
+ $ make install
+ $ make check-install # verify installation.
+
+ Some versions of the tar command support the -z option. In such cases,
+ the first step above can be simplified to the following:
+
+ $ tar zxf hdf5-X.Y.Z.tar.gz
+
+ <configure_flags> above refers to the configure flags appropriate
+ to your installation. For example, to install HDF5 with the
+ Fortran and C++ interfaces and with SZIP compression, the
+ configure line might read as follows:
+
+ $ ./configure --prefix=/usr/local/hdf5 --enable-fortran \
+ --enable-cxx --with-szlib=PATH_TO_SZIP
+
+ In this case, PATH_TO_SZIP would be replaced with the path to the
+ installed location of the SZIP library.
+
+2.1. Windows
+ Users of Microsoft Windows should see the INSTALL_Windows files for
+ detailed instructions.
+
+2.2. RedStorm (Cray XT3)
+ Users of the Red Storm machine, after reading this file, should read
+ the Red Storm section in the INSTALL_parallel file for specific
+ instructions for the Red Storm machine. The same instructions would
+ probably work for other Cray XT3 systems, but they have not been
+ verified.
+
+
+3. HDF5 dependencies
+3.1. Zlib
+ The HDF5 Library includes a predefined compression filter that
+ uses the "deflate" method for chunked datasets. If zlib-1.1.2 or
+ later is found, HDF5 will use it. Otherwise, HDF5's predefined
+ compression method will degenerate to a no-op; the compression
+ filter will succeed but the data will not be compressed.
+
+3.2. Szip (optional)
+ The HDF5 Library includes a predefined compression filter that
+ uses the extended-Rice lossless compression algorithm for chunked
+ datasets. For more information about Szip compression and license
+ terms, see http://hdfgroup.org/doc_resource/SZIP/.
+
+ The Szip source code can be obtained from the HDF5 Download page
+ http://www.hdfgroup.org/HDF5/release/obtain5.html#extlibs. Building
+ instructions are available with the Szip source code.
+
+ The HDF Group does not distribute separate Szip precompiled libraries,
+ but the HDF5 binaries available from
+ http://www.hdfgroup.org/HDF5/release/obtain5.html include
+ the Szip encoder enabled binary for the corresponding platform.
+
+ To configure the HDF5 Library with the Szip compression filter, use
+ the '--with-szlib=/PATH_TO_SZIP' flag. For more information, see
+ section 4.3.7, "Specifying other libraries and headers."
+
+ Please notice that if HDF5 configure cannot find a valid Szip library,
+ configure will not fail; in this case, the compression filter will
+ not be available to the applications.
+
+ To check if Szip compression was successfully configured in,
+ check the "I/O filters (external):" line in the configure output,
+ summary section, printed to the standard output.
+
+3.3. MPI and MPI-IO
+ The parallel version of the library is built upon the foundation
+ provided by MPI and MPI-IO. If these libraries are not available
+ when HDF5 is configured, only a serial version of HDF5 can be built.
+
+
+4. Full installation instructions for source distributions
+
+4.1. Unpacking the distribution
+ The HDF5 source code is distributed in a variety of formats which
+ can be unpacked with the following commands, each of which creates an
+ 'hdf5-X.Y.Z' directory, where X.Y.Z is the HDF5 version numbers.
+
+4.1.1. Non-compressed tar archive (*.tar)
+
+ $ tar xf hdf5-X.Y.Z.tar
+
+4.1.2. Compressed tar archive (*.tar.Z)
+
+ $ uncompress -c < hdf5-X.Y.Z.tar.Z | tar xf -
+ Or
+ $ tar Zxf hdf5-X.Y.Z.tar.Z
+
+4.1.3. Gzip'd tar archive (*.tar.gz)
+
+ $ gunzip < hdf5-X.Y.Z.tar.gz | tar xf -
+ Or
+ $ tar zxf hdf5-X.Y.Z.tar.gz
+
+4.1.4. Bzip'd tar archive (*.tar.bz2)
+
+ $ bunzip2 < hdf5-X.Y.Z.tar.bz2 | tar xf -
+ Or
+ $ tar jxf hdf5-X.Y.Z.tar.bz2
+
+4.2. Source versus build directories
+ On most systems the build can occur in a directory other than the
+ source directory, allowing multiple concurrent builds and/or
+ read-only source code. In order to accomplish this, one should
+ create a build directory, cd into that directory, and run the
+ `configure' script found in the source directory (configure
+ details are below). For example,
+ $ mkdir built-fortran
+ $ cd build-fortran
+ $ ../hdf5-X.Y.Z/configure --enable-fortran ...
+
+ Unfortunately, this does not work on recent Irix platforms (6.5?
+ and later) because that `make' does not understand the VPATH variable.
+ However, HDF5 also supports Irix `pmake' which has a .PATH target
+ which serves a similar purpose. Here's what the Irix man pages say
+ about VPATH, the facility used by HDF5 makefiles for this feature:
+
+ The VPATH facility is a derivation of the undocumented
+ VPATH feature in the System V Release 3 version of make.
+ System V Release 4 has a new VPATH implementation, much
+ like the pmake(1) .PATH feature. This new feature is also
+ undocumented in the standard System V Release 4 manual
+ pages. For this reason it is not available in the IRIX
+ version of make. The VPATH facility should not be used
+ with the new parallel make option.
+
+4.3. Configuring
+ HDF5 uses the GNU autoconf system for configuration, which
+ detects various features of the host system and creates the
+ Makefiles. On most systems it should be sufficient to say:
+
+ $ ./configure
+ Or
+ $ sh configure
+
+ The configuration process can be controlled through environment
+ variables, command-line switches, and host configuration files.
+ For a complete list of switches type:
+
+ $ ./configure --help
+
+ The host configuration files are located in the `config'
+ directory and are based on architecture name, vendor name, and/or
+ operating system which are displayed near the beginning of the
+ `configure' output. The host config file influences the behavior
+ of configure by setting or augmenting shell variables.
+
+4.3.1. Specifying the installation directories
+ The default installation location is the HDF5 directory created in
+ the build directory. Typing `make install' will install the HDF5
+ Library, header files, examples, and support programs in hdf5/lib,
+ hdf5/include, hdf5/doc/hdf5/examples, and hdf5/bin. To use a path
+ other than hdf5, specify the path with the `--prefix=PATH' switch:
+
+ $ ./configure --prefix=/usr/local
+
+ If shared libraries are being built (the default), the final
+ home of the shared library must be specified with this switch
+ before the library and executables are built.
+
+ HDF5 can be installed into a different location than the prefix
+ specified at configure time; see section 4.6, "Installing HDF5,"
+ for more details.
+
+4.3.2. Using an alternate C compiler
+ By default, configure will look for the C compiler by trying
+ `gcc' and `cc'. However, if the environment variable "CC" is set
+ then its value is used as the C compiler. For instance, one would
+ use the following line to specify the native C compiler on a system
+ that also has the GNU gcc compiler (users of csh and derivatives
+ will need to prefix the commands below with `env'):
+
+ $ CC=cc ./configure
+
+ A parallel version of HDF5 can be built by specifying `mpicc'
+ as the C compiler. (The `--enable-parallel' flag documented
+ below is optional in this case.) Using the `mpicc' compiler
+ will insure that the correct MPI and MPI-IO header files and
+ libraries are used.
+
+ $ CC=/usr/local/mpi/bin/mpicc ./configure
+
+4.3.3. Configuring for 64-bit support
+ Several machine architectures support 32-bit or 64-bit binaries.
+ The options below describe how to enable support for different options.
+
+ On Irix64, the default compiler is `cc'. To use an alternate compiler,
+ specify it with the CC variable:
+
+ $ CC='cc -n32' ./configure
+
+ Similarly, users compiling on a Solaris machine and desiring to
+ build the distribution with 64-bit support should specify the
+ correct flags with the CC variable:
+
+ $ CC='cc -m64' ./configure
+
+ To configure AIX 64-bit support including the Fortran and C++ APIs,
+ (Note: need to set $AR to 'ar -X 64'.)
+ Serial:
+ $ CFLAGS=-q64 FCFLAGS=-q64 CXXFLAGS=-q64 AR='ar -X 64'\
+ ./configure --enable-fortran
+ Parallel: (C++ not supported with parallel)
+ $ CFLAGS=-q64 FCFLAGS=-q64 AR='ar -X 64'\
+ ./configure --enable-fortran
+
+4.3.4. Additional compilation flags
+ If addtional flags must be passed to the compilation commands,
+ specify those flags with the CFLAGS variable. For instance,
+ to enable symbolic debugging of a production version of HDF5, one
+ might say:
+
+ $ CFLAGS=-g ./configure --enable-production
+
+4.3.5. Compiling HDF5 wrapper libraries
+ One can optionally build the Fortran and/or C++ interfaces to the
+ HDF5 C library. By default, both options are disabled. To build
+ them, specify `--enable-fortran' and `--enable-cxx', respectively.
+
+ $ ./configure --enable-fortran
+ $ ./configure --enable-cxx
+
+ Configuration will halt if a working Fortran 90 or 95 compiler or
+ C++ compiler is not found. Currently, the Fortran configure tests
+ for these compilers in order: f90, pgf90, f95. To use an
+ alternate compiler specify it with the FC variable:
+
+ $ FC=/usr/local/bin/g95 ./configure --enable-fortran
+
+ Note: The Fortran and C++ interfaces are not supported on all the
+ platforms the main HDF5 Library supports. Also, the Fortran
+ interface supports parallel HDF5 while the C++ interface does
+ not.
+
+ Note: See sections 4.7 and 4.8 for building the Fortran library with
+ Intel or PGI compilers.
+
+4.3.6. Specifying other programs
+ The build system has been tuned for use with GNU make but also
+ works with other versions of make. If the `make' command runs a
+ non-GNU version but a GNU version is available under a different
+ name (perhaps `gmake'), then HDF5 can be configured to use it by
+ setting the MAKE variable. Note that whatever value is used for
+ MAKE must also be used as the make command when building the
+ library:
+
+ $ MAKE=gmake ./configure
+ $ gmake
+
+ The `AR' and `RANLIB' variables can also be set to the names of
+ the `ar' and `ranlib' (or `:') commands to override values
+ detected by configure.
+
+ The HDF5 Library, include files, and utilities are installed
+ during `make install' (described below) with a BSD-compatible
+ install program detected automatically by configure. If none is
+ found, the shell script bin/install-sh is used. Configure does not
+ check that the install script actually works; if a bad install is
+ detected on your system (e.g., on the ASCI blue machine as of
+ March 2, 1999) you have two choices:
+
+ 1. Copy the bin/install-sh program to your $HOME/bin
+ directory, name it `install', and make sure that $HOME/bin
+ is searched before the system bin directories.
+
+ 2. Specify the full path name of the `install-sh' program
+ as the value of the INSTALL environment variable. Note: do
+ not use `cp' or some other program in place of install
+ because the HDF5 makefiles also use the install program to
+ change file ownership and/or access permissions.
+
+4.3.7. Specifying other libraries and headers
+ Configure searches the standard places (those places known by the
+ systems compiler) for include files and header files. However,
+ additional directories can be specified by using the CPPFLAGS
+ and/or LDFLAGS variables:
+
+ $ CPPFLAGS=-I/home/robb/include \
+ LDFLAGS=-L/home/robb/lib \
+ ./configure
+
+ HDF5 uses the zlib library to support the HDF5 deflate
+ data compression filter. Configure searches the standard places
+ (plus those specified above with the CPPFLAGS and LDFLAGS variables)
+ for the zlib headers and library. The search can be disabled by
+ specifying `--without-zlib' or alternate directories can be specified
+ with `--with-zlib=INCDIR,LIBDIR' or through the CPPFLAGS and LDFLAGS
+ variables:
+
+ $ ./configure --with-zlib=/usr/unsup/include,/usr/unsup/lib
+
+ $ CPPFLAGS=-I/usr/unsup/include \
+ LDFLAGS=-L/usr/unsup/lib \
+ ./configure
+
+ HDF5 includes Szip as a predefined compression method (see 3.2).
+ To enable Szip compression, the HDF5 Library must be configured
+ and built using the Szip Library:
+
+ $ ./configure --with-szlib=/Szip_Install_Directory
+
+4.3.8. Static versus shared linking
+ The build process will create static libraries on all systems and
+ shared libraries on systems that support dynamic linking to a
+ sufficient degree. Either form of the library may be suppressed by
+ saying `--disable-static' or `--disable-shared'.
+
+ $ ./configure --disable-shared
+
+ Shared C++ and Fortran libraries will be built if shared libraries
+ are enabled.
+
+ To build only statically linked executables on platforms which
+ support shared libraries, use the `--enable-static-exec' flag.
+
+ $ ./configure --enable-static-exec
+
+4.3.9. Optimization versus symbolic debugging
+ The library can be compiled to provide symbolic debugging support
+ so it can be debugged with gdb, dbx, ddd, etc., or it can be
+ compiled with various optimizations. To compile for symbolic
+ debugging (the default for snapshots), say `--disable-production';
+ to compile with optimizations (the default for supported public
+ releases), say `--enable-production'. On some systems the library
+ can also be compiled for profiling with gprof by saying
+ `--enable-production=profile'.
+
+ $ ./configure --disable-production #symbolic debugging
+ $ ./configure --enable-production #optimized code
+ $ ./configure --enable-production=profile #for use with gprof
+
+ Regardless of whether support for symbolic debugging is enabled,
+ the library can also perform runtime debugging of certain packages
+ (such as type conversion execution times and extensive invariant
+ condition checking). To enable this debugging, supply a
+ comma-separated list of package names to to the `--enable-debug'
+ switch. See "Debugging HDF5 Applications" for a list of package
+ names:
+
+ http://www.hdfgroup.org/HDF5/doc/H5.user/Debugging.html
+
+ Debugging can be disabled by saying `--disable-debug'.
+ The default debugging level for snapshots is a subset of the
+ available packages; the default for supported releases is no
+ debugging (debugging can incur a significant runtime penalty).
+
+ $ ./configure --enable-debug=s,t #debug only H5S and H5T
+ $ ./configure --enable-debug #debug normal packages
+ $ ./configure --enable-debug=all #debug all packages
+ $ ./configure --disable-debug #no debugging
+
+ HDF5 can also print a trace of all API function calls, their
+ arguments, and the return values. To enable or disable the
+ ability to trace the API say `--enable-trace' (the default for
+ snapthots) or `--disable-trace' (the default for public releases).
+ The tracing must also be enabled at runtime to see any output
+ (see "Debugging HDF5 Applications," reference above).
+
+4.3.10. Parallel versus serial library
+ The HDF5 Library can be configured to use MPI and MPI-IO for
+ parallelism on a distributed multi-processor system. Read the
+ file INSTALL_parallel for detailed explanations.
+
+4.3.11. Threadsafe capability
+ The HDF5 Library can be configured to be thread-safe (on a very
+ large scale) with the `--enable-threadsafe' flag to the configure
+ script. Some platforms may also require the '-with-pthread=INC,LIB'
+ (or '--with-pthread=DIR') flag to the configure script.
+ For further details, see "HDF5 Thread Safe Library":
+
+ http://www.hdfgroup.org/HDF5/doc/TechNotes/ThreadSafeLibrary.html
+
+4.3.12. Backward compatibility
+ The 1.8 version of the HDF5 Library can be configured to operate
+ identically to the v1.6 library with the
+ --with-default-api-version=v16
+ configure flag. This allows existing code to be compiled with the
+ v1.8 library without requiring immediate changes to the application
+ source code. For addtional configuration options and other details,
+ see "API Compatibility Macros in HDF5":
+
+ http://www.hdfgroup.org/HDF5/doc/RM/APICompatMacros.html
+
+4.4. Building
+ The library, confidence tests, and programs can be built by
+ saying just:
+
+ $ make
+
+ Note that if you have supplied some other make command via the MAKE
+ variable during the configuration step, that same command must be
+ used here.
+
+ When using GNU make, you can add `-j -l6' to the make command to
+ compile in parallel on SMP machines. Do not give a number after
+ the `-j' since GNU make will turn it off for recursive invocations
+ of make.
+
+ $ make -j -l6
+
+4.5. Testing
+ HDF5 comes with various test suites, all of which can be run by
+ saying
+
+ $ make check
+
+ To run only the tests for the library, change to the `test'
+ directory before issuing the command. Similarly, tests for the
+ parallel aspects of the library are in `testpar' and tests for
+ the support programs are in `tools'.
+
+ The `check' consists of two sub-tests, check-s and check-p, which
+ are for serial and parallel tests, respectively. Since serial tests
+ and parallel tests must be run with single and multiple processes
+ respectively, the two sub-tests work nicely for batch systems in
+ which the number of processes is fixed per batch job. One may submit
+ one batch job, requesting 1 process, to run all the serial tests by
+ "make check-s"; and submit another batch job, requesting multiple
+ processes, to run all the parallel tests by "make check-p".
+
+ Temporary files will be deleted by each test when it completes,
+ but may continue to exist in an incomplete state if the test
+ fails. To prevent deletion of the files, define the HDF5_NOCLEANUP
+ environment variable.
+
+ The HDF5 tests can take a long time to run on some systems. To perform
+ a faster (but less thorough) test, set the HDF5TestExpress environment
+ variable to 2 or 3 (with 3 being the shortest run). To perform a
+ longer test, set HDF5TestExpress to 0. 1 is the default.
+
+4.6. Installing HDF5
+ The HDF5 Library, include files, and support programs can be
+ installed in a (semi-)public place by saying `make install'. The
+ files are installed under the directory specified with
+ `--prefix=DIR' (default is 'hdf5') in directories named `lib',
+ `include', and `bin'. The directories, if not existing, will be
+ created automatically, provided the mkdir command supports the -p
+ option.
+
+ If `make install' fails because the install command at your site
+ somehow fails, you may use the install-sh that comes with the
+ source. You will need to run ./configure again.
+
+ $ INSTALL="$PWD/bin/install-sh -c" ./configure ...
+ $ make install
+
+ If you want to install HDF5 in a location other than the location
+ specified by the `--prefix=DIR' flag during configuration (or
+ instead of the default location, `hdf5'), you can do that
+ by running the deploy script:
+
+ $ bin/deploy NEW_DIR
+
+ This will install HDF5 in NEW_DIR. Alternately, you can do this
+ manually by issuing the command:
+
+ $ make install prefix=NEW_DIR
+
+ where NEW_DIR is the new directory where you wish to install HDF5.
+ If you do not use the deploy script, you should run h5redeploy in
+ NEW_DIR/bin directory. This utility will fix the h5cc, h5fc and
+ h5c++ scripts to reflect the new NEW_DIR location.
+
+ The library can be used without installing it by pointing the
+ compiler at the `src' and 'src/.libs' directory for include files and
+ libraries. However, the minimum which must be installed to make
+ the library publicly available is:
+
+ The library:
+ ./src/.libs/libhdf5.a
+
+ The public header files:
+ ./src/H5*public.h, ./src/H5public.h
+ ./src/H5FD*.h except ./src/H5FDprivate.h,
+ ./src/H5api_adpt.h
+
+ The main header file:
+ ./src/hdf5.h
+
+ The configuration information:
+ ./src/H5pubconf.h
+
+ The support programs that are useful are:
+ ./tools/h5ls/h5ls (list file contents)
+ ./tools/h5dump/h5dump (dump file contents)
+ ./tools/misc/h5repart (repartition file families)
+ ./tools/misc/h5debug (low-level file debugging)
+ ./tools/h5import/h5import (imports data to HDF5 file)
+ ./tools/h5diff/h5diff (compares two HDF5 files)
+ ./tools/gifconv/h52gif (HDF5 to GIF converter)
+ ./tools/gifconv/gif2h5 (GIF to HDF5 converter)
+
+
+5. Using the Library
+ Please see the "HDF5 User's Guide" and the "HDF5 Reference Manual":
+
+ http://www.hdfgroup.org/HDF5/doc/
+
+ Most programs will include <hdf5.h> and link with -lhdf5.
+ Additional libraries may also be necessary depending on whether
+ support for compression, etc., was compiled into the HDF5 Library.
+
+ A summary of the HDF5 installation can be found in the
+ libhdf5.settings file in the same directory as the static and/or
+ shared HDF5 Libraries.
+
+
+6. Support
+ Support is described in the README file.
+
+
+*****************************************************************************
+ APPENDIX
+*****************************************************************************
+
+A. Warnings about compilers
+ Output from the following compilers should be extremely suspected
+ when used to compile the HDF5 Library, especially if optimizations are
+ enabled. In all cases, HDF5 attempts to work around the compiler bugs.
+
+A.1. GNU (Intel platforms)
+ Versions before 2.8.1 have serious problems allocating registers
+ when functions contain operations on `long long' datatypes.
+
+A.2. COMPAQ/DEC
+ The V5.2-038 compiler (and possibly others) occasionally
+ generates incorrect code for memcpy() calls when optimizations
+ are enabled, resulting in unaligned access faults. HDF5 works
+ around the problem by casting the second argument to `char *'.
+ The Fortran module (5.4.1a) fails in compiling some Fortran
+ programs. Use 5.5.0 or higher.
+
+A.3. SGI (Irix64 6.2)
+ The Mongoose 7.00 compiler has serious optimization bugs and
+ should be upgraded to MIPSpro 7.2.1.2m. Patches are available
+ from SGI.
+
+A.4. Windows/NT
+ The Microsoft Win32 5.0 compiler is unable to cast unsigned long
+ long values to doubles. HDF5 works around this bug by first
+ casting to signed long long and then to double.
+
+ A link warning: defaultlib "LIBC" conflicts with use of other libs
+ appears for debug version of VC++ 6.0. This warning will not affect
+ building and testing HDF5 Libraries.
+
+
+B. Large (>2GB) versus small (<2GB) file capability
+ In order to read or write files that could potentially be larger
+ than 2GB, it is necessary to use the non-ANSI `long long' data
+ type on some platforms. However, some compilers (e.g., GNU gcc
+ versions before 2.8.1 on Intel platforms) are unable to produce
+ correct machine code for this datatype.
+
+
+C. Building and testing with other compilers
+C.1. Building and testing with Intel compilers
+ When Intel compilers are used (icc or ecc), you will need to modify
+ the generated "libtool" program after configuration is finished.
+ On or around line 104 of the libtool file, there are lines which
+ look like:
+
+ # How to pass a linker flag through the compiler.
+ wl=""
+
+ Change these lines to this:
+
+ # How to pass a linker flag through the compiler.
+ wl="-Wl,"
+
+ UPDATE: This is now done automatically by the configure script.
+ However, if you still experience a problem, you may want to check this
+ line in the libtool file and make sure that it has the correct value.
+
+ * To build the Fortran library using Intel compiler on Linux 2.4,
+ one has to perform the following steps:
+ x Use the -fpp -DDEC$=DEC_ -DMS$=MS_ compiler flags to disable
+ DEC and MS compiler directives in source files in the fortran/src,
+ fortran/test, and fortran/examples directories.
+ E.g., setenv F9X 'ifc -fpp -DDEC$=DEC_ -DMS$=MS_'
+ Do not use double quotes since $ is interpreted in them.
+
+ x If Version 6.0 of Fortran compiler is used, the build fails in
+ the fortran/test directory and then in the fortran/examples
+ directory. To proceed, edit the work.pcl files in those
+ directories to contain two lines:
+
+ work.pc
+ ../src/work.pc
+
+ x Do the same in the fortran/examples directory.
+
+ x A problem with work.pc files was resolved for the newest version
+ of the compiler (7.0).
+
+ * To build the Fortran library on IA32, follow the steps described
+ above, except that the DEC and MS compiler directives should be
+ removed manually or use a patch from HDF FTP server:
+
+ ftp://ftp.hdfgroup.org/HDF5/current/
+
+
+C.2. Building and testing with PGI compilers
+ When PGI C and C++ compilers are used (pgcc or pgCC), you will need to
+ modify the generated "libtool" program after configuration is finished.
+ On or around line 104 of the libtool file, there are lines which
+ look like this:
+
+ # How to pass a linker flag through the compiler.
+ wl=""
+
+ Change these lines to this:
+
+ # How to pass a linker flag through the compiler.
+ wl="-Wl,"
+
+ UPDATE: This is now done automatically by the configure script. However,
+ if you still experience a problem, you may want to check this line in
+ the libtool file and make sure that it has the correct value.
+
+ To build the HDF5 C++ Library with pgCC (version 4.0 and later), set
+ the environment variable CXX to "pgCC -tlocal"
+ setenv CXX "pgCC -tlocal"
+ before running the configure script.
+