[Qemu-devel] [PATCH 8/8] RFC configure: do_compiler: Dump some extra info under bash

From: Ian Jackson <ian.jackson@eu.citrix.com>
To: qemu-devel@nongnu.org
Cc: Ross Lagerwall <ross.lagerwall@citrix.com>,
	Anthony PERARD <anthony.perard@citrix.com>,
	xen-devel@lists.xenproject.org, Juergen Gross <jgross@suse.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	xen-devel@nongnu.org, Ian Jackson <Ian.Jackson@eu.citrix.com>
Subject: [Qemu-devel] [PATCH 8/8] RFC configure: do_compiler: Dump some extra info under bash
Date: Wed, 4 Oct 2017 17:18:11 +0100	[thread overview]
Message-ID: <1507133891-26013-9-git-send-email-ian.jackson@eu.citrix.com> (raw)
In-Reply-To: <1507133891-26013-1-git-send-email-ian.jackson@eu.citrix.com>

This makes it much easier to find a particular thing in config.log.

The information may be lacking in other shells, resulting in harmless
empty output.  (This is why we don't use the proper ${FUNCNAME[*]}
array syntax - other shells will choke on that.)

The extra output is only printed if configure is run with bash.  The
something), it is necessary to say   bash ./configure  to get the extra
debug info in the log.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
 configure | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure b/configure
index 6f691df..21a2b15 100755
--- a/configure
+++ b/configure
@@ -60,6 +60,10 @@ do_compiler() {
     # is compiler binary to execute.
     local compiler="$1"
     shift
+    echo >>config.log "
+funcs: ${FUNCNAME}
+lines: ${BASH_LINENO}
+files: ${BASH_SOURCE}"
     echo $compiler "$@" >> config.log
     $compiler "$@" >> config.log 2>&1 || return $?
     # Test passed. If this is an --enable-werror build, rerun
-- 
2.1.4
