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From: John Snow <jsnow@redhat.com>
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Date: Wed, 28 Oct 2015 13:56:40 -0400
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Subject: [PATCH] configure: disallow ccache during compile tests
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If the user is using ccache during the configuration step,
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it may interfere with some of the configuration tests,
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particularly the "Is ccache interfering with macro analysis" step,
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which is a bit of a poetic problem.
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1) Disallow ccache from reading from the cache during configure,
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but don't disable it entirely to allow us to see if it causes other
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problems.
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2) Force off CCACHE_CPP2 during the ccache test to get a deterministic
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answer over whether or not we need to enable that feature later.
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Signed-off-by: John Snow <jsnow@redhat.com>
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Message-Id: <1446055000-29150-1-git-send-email-jsnow@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 5e4dfd3d4e87e0464d599ecef06aa8fe78420a9b)
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---
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configure | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/configure b/configure
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index 69a5e2d..b29c923 100755
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--- a/configure
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+++ b/configure
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@@ -8,6 +8,9 @@
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CLICOLOR_FORCE= GREP_OPTIONS=
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unset CLICOLOR_FORCE GREP_OPTIONS
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+# Don't allow CCACHE, if present, to use cached results of compile tests!
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+export CCACHE_RECACHE=yes
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+
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# Temporary directory used for files created while
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# configure runs. Since it is in the build directory
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# we can safely blow away any previous version of it
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