Add build-many-glibcs.py option to strip installed shared libraries.

This patch adds a --strip option to build-many-glibcs.py, to make it
strip the installed shared libraries after installation.  This is for
convenience if you want to compare installed stripped shared libraries
before and after a patch that was not meant to result in any code
changes: you can run with this option, copy the install/glibcs
directory, run again with the patch and compare the */lib*
subdirectory contents.

(It might make sense for the option to strip libraries in other
directories, including stripping debug information from static
libraries, with a view to making it possible for a
no-generated-code-changes patch to result in completely identical
install/glibcs directories, so simplifying comparison, though that may
need other build determinism changes, e.g. to build deterministic .a
files.)

	* scripts/build-many-glibcs.py (Context.__init__): Take strip
	argument.
	(Glibc.build_glibc): Strip installed shared libraries if
	requested.
	(get_parser): Add --strip option.
	(main): Update Context call.

2 files changed, 20 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index e2c9aab89f..57ce74d446 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2016-12-07  Joseph Myers  <joseph@codesourcery.com>
+
+	* scripts/build-many-glibcs.py (Context.__init__): Take strip
+	argument.
+	(Glibc.build_glibc): Strip installed shared libraries if
+	requested.
+	(get_parser): Add --strip option.
+	(main): Update Context call.
+
 2016-12-07  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 	    Dominik Vogt  <vogt@linux.vnet.ibm.com>
 
diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index d089b0c7a5..eb9b8cc34d 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -53,12 +53,14 @@ import urllib.request
 class Context(object):
     """The global state associated with builds in a given directory."""
 
-    def __init__(self, topdir, parallelism, keep, replace_sources, action):
+    def __init__(self, topdir, parallelism, keep, replace_sources, strip,
+                 action):
         """Initialize the context."""
         self.topdir = topdir
         self.parallelism = parallelism
         self.keep = keep
         self.replace_sources = replace_sources
+        self.strip = strip
         self.srcdir = os.path.join(topdir, 'src')
         self.versions_json = os.path.join(self.srcdir, 'versions.json')
         self.build_state_json = os.path.join(topdir, 'build-state.json')
@@ -1318,6 +1320,11 @@ class Glibc(object):
                                           os.path.join(installdir,
                                                        'usr', 'lib')])
         if not for_compiler:
+            if self.ctx.strip:
+                cmdlist.add_command('strip',
+                                    ['sh', '-c',
+                                     ('%s %s/lib*/*.so' %
+                                      (self.tool_name('strip'), installdir))])
             cmdlist.add_command('check', ['make', 'check'])
             cmdlist.add_command('save-logs', [self.ctx.save_logs],
                                 always_run=True)
@@ -1490,6 +1497,8 @@ def get_parser():
     parser.add_argument('--replace-sources', action='store_true',
                         help='Remove and replace source directories '
                         'with the wrong version of a component')
+    parser.add_argument('--strip', action='store_true',
+                        help='Strip installed glibc libraries')
     parser.add_argument('topdir',
                         help='Toplevel working directory')
     parser.add_argument('action',
@@ -1508,7 +1517,7 @@ def main(argv):
     opts = parser.parse_args(argv)
     topdir = os.path.abspath(opts.topdir)
     ctx = Context(topdir, opts.parallelism, opts.keep, opts.replace_sources,
-                  opts.action)
+                  opts.strip, opts.action)
     ctx.run_builds(opts.action, opts.configs)