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Re: Add script to build many glibc configurations

On Thu, 17 Nov 2016, Zack Weinberg wrote:

> On 11/17/2016 11:52 AM, Zack Weinberg wrote:
> > On 11/09/2016 11:27 AM, Joseph Myers wrote:
> >> This patch adds a Python (3.5 or later) script to build many different
> >> configurations of glibc, including building the required cross
> >> compilers first.  It's not intended to change any patch testing
> >> requirements, although some people may wish to use it for high-risk
> >> patches such as adding warning options ...
> > 
> > Since this does its own glibc checkout, it's not clear to me how one
> > should use it to test a patch(set).  I presume that whatever one does,
> > it only affects the "glibcs" step, but what actually do you do?  Do you
> > manually update /some/where/src/glibc to contain the code you want
> > tested and then run "glibcs", or do you somehow tell
> > the name of a branch you want tested, or what?
> I went ahead with the setup steps, and they failed during the compilers
> phase.  It seems that it's not picking up the host libraries I just
> built.  Now what?

I've committed this patch to fix this.  (The systems I tested on had 
suitable versions of these libraries installed where host GCC could find 
them, so I didn't notice that the newly built libraries weren't being 

Actually use newly built host libraries in

This patch adds the missing GCC configure options required to make use
of the newly built host libraries in

2016-11-17  Joseph Myers  <>

	* scripts/ (Config.build_gcc): Configure with
	newly built gmp, mpfr and mpc.

diff --git a/scripts/ b/scripts/
index be561c3..b0e0f5e 100755
--- a/scripts/
+++ b/scripts/
@@ -813,6 +813,10 @@ class Config(object):
         # relevance with glibc's own stack checking support.
         cfg_opts = list(self.gcc_cfg)
         cfg_opts += ['--disable-libsanitizer', '--disable-libssp']
+        host_libs = self.ctx.host_libraries_installdir
+        cfg_opts += ['--with-gmp=%s' % host_libs,
+                     '--with-mpfr=%s' % host_libs,
+                     '--with-mpc=%s' % host_libs]
         if bootstrap:
             tool_build = 'gcc-first'
             # Building a static-only, C-only compiler that is

Joseph S. Myers

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