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[libvirt] [PATCH] build: speed up non-maintainer builds

* configure.ac (gl_ASSERT_NO_GNULIB_POSIXCHECK): Use to reduce
time spent in configure.

This skips out on the bulk of the 'declared without a macro' checks
during configure time (they are only useful if you are going to
run with CFLAGS=-DGNULIB_POSIXCHECK=1, but that's a maintainer action);
it also results in a smaller config.h (no HAVE_RAW_DECL substitutions).

Worth including in 0.8.8?

 configure.ac |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index 3cd824a..7172b92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,6 +9,11 @@ dnl Make automake keep quiet about wildcards & other GNUmake-isms

+# Maintainer note - comment this line out if you plan to rerun
+# GNULIB_POSIXCHECK testing to see if libvirt should be using more modules.
+# Leave it uncommented for normal releases, for faster ./configure.
 # Use the silent-rules feature when possible.
 m4_ifndef([AM_SILENT_RULES], [m4_define([AM_SILENT_RULES],[])])

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