[Qemu-devel] [PATCH] config-host.mak: escape configure arguments

[Gabriel Kerneis <gabriel@kerneis.info>]

Escape single quotes and newlines when writing configure arguments
to config-host.mak. This is necessary to allow correct regeneration
by re-executing configure in a shell when config-host.mak becomes
out-of-date.

Signed-off-by: Gabriel Kerneis <gabriel@kerneis.info>
---
 configure | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 23dbaaf..fba7c1f 100755
--- a/configure
+++ b/configure
@@ -3769,7 +3769,11 @@ echo "# Automatically generated by configure - do not modify" >config-all-disas.
 
 echo "# Automatically generated by configure - do not modify" > $config_host_mak
 printf "# Configured with:" >> $config_host_mak
-printf " '%s'" "$0" "$@" >> $config_host_mak
+for arg in "$0" "$@"; do
+  # join each arg on a single line, escaping newlines and single quotes
+  quoted_arg=$(echo "$arg" | sed ":a;N;s/\n/\\\\n/;ba" | sed "s/'/'\\\\''/g")
+  printf " '%s'" "$quoted_arg"
+done >> $config_host_mak
 echo >> $config_host_mak
 
 echo all: >> $config_host_mak
-- 
1.8.4.rc3