If we're using a cvs snapshot which updates the source files, and

 perl isn't installed yet, then we can't regen the docs.  Not a big

 deal, so just whine a little and continue on our merry way.

 http://bugs.gentoo.org/60132

 diff -durN glibc-2.10.1.orig/manual/Makefile glibc-2.10.1/manual/Makefile

 --- glibc-2.10.1.orig/manual/Makefile	2006-01-08 07:43:47.000000000 +0100

 +++ glibc-2.10.1/manual/Makefile	2009-11-13 00:49:54.000000000 +0100

 @@ -104,9 +104,14 @@

  libm-err.texi: stamp-libm-err

  stamp-libm-err: libm-err-tab.pl $(wildcard $(foreach dir,$(sysdirs),\

  						     $(dir)/libm-test-ulps))

 +ifneq ($(PERL),no)

  	pwd=`pwd`; \

  	$(PERL) $< $$pwd/.. > libm-err-tmp

  	$(move-if-change) libm-err-tmp libm-err.texi

 +else

 +	echo "Unable to rebuild math docs, no perl installed"

 +	touch libm-err.texi

 +endif

  	touch $@

  # Generate Texinfo files from the C source for the example programs.