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INSTALLATION NOTES FOR QRUPDATE
-------------------------------
The library is written in Fortran. Officially, it is Fortran 90-compliant,
but will probably be compilable with Fortran 77 compilers supporting
two common extensions: double complex type, end if/end do/end subroutine blocks
and automatic arrays. The latter are only needed for the test suite.
In particular, it has been tested with the following compilers:
* gfortran 4.3
* g95 0.91
* Intel Fortran 10.1
* g77 3.4 (does not compile test suite)
* f2c (does not compile test suite)
If you succeeded to compile qrupdate with a compiler not mentioned here
(or an earlier version), please contact me so that the list can be expanded.
To compile on an UNIX-compatible system, edit Makeconf to set up your
preferred compiler & compiler flags. Defaults are provided using GNU Fortran,
which should work straight away.
Then do "make lib" to create a static library (libqrupdate.a). To create
a dynamic library (libqrupdate.so), do "make solib". In that case, make sure
your compiler flags support PIC code (if needed on your system).
To compile & run tests, do "make test". All tests will display their results as
well as save them using the "tee" utility. A test works correctly if it runs
OK and outputs all small residuals (of order e-06 for single precision, e-14
for double precision). Note that subsequent "make test" only redisplays the
stored results, unless a test is changed.
Installing is as simple as putting the library anywhere at will.
Windows makefile is not (yet) provided, but should be easily derived from the
UNIX one.
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