Output: Include gzstream package to allow automatically-gzipped output

The gzstream package provides an ostream-interface for writing gzipped files.
The package comes from:
    http://www.cs.unc.edu/Research/compgeom/gzstream/
And is distributed under the LGPL license. Both the license and version
information has been preservered, though all other files in the package have
been purged. Minor modifications to the code have been made. The output module
detects when a filename ends in .gz and constructs an ogzstream object instead
of an ofstream object. This works for both the create(...) and find(...)
commands. Additionally, since gzstream objects needs to be closed to ensure
proper file termination, I have the output deconstructor deleting all ostream's
that it manages on behalf of find(...). At the moment, the only output file
that I know this functionality works for is stats, i.e. by specifying
"--stats-file=m5stats.txt.gz" on the command line.

1 files changed, 5 insertions, 0 deletions

diff --git a/SConstruct b/SConstruct
index d33ed9079..6894ac05c 100644
--- a/SConstruct
+++ b/SConstruct
@@ -726,6 +726,11 @@ env.SConscript('ext/libelf/SConscript',
                build_dir = joinpath(build_root, 'libelf'),
                exports = 'env')
 
+# gzstream build is shared across all configs in the build root.
+env.SConscript('ext/gzstream/SConscript',
+               build_dir = joinpath(build_root, 'gzstream'),
+               exports = 'env')
+
 ###################################################
 #
 # This function is used to set up a directory with switching headers