autogen.sh: add code to re-run configure afterwards

Add code to autogen.sh to (re-)run configure, with preserved
configuration.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/autogen.sh b/autogen.sh
index b7633c66..2b04f995 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -2,6 +2,12 @@
 #
 # Run this script to regenerate autoconf files
 #
+recheck=false
+if [ x"$1" = x--recheck ]; then
+    recheck=true
+    config=$(sh config.status --config 2>/dev/null)
+fi
+
 mkdir -p autoconf autoconf/aux config
 autolib="`automake --print-libdir`"
 for prg in install-sh compile config.guess config.sub; do
@@ -18,3 +24,8 @@ rm -rf autoconf/m4.old
 autoheader -B autoconf
 autoconf -B autoconf
 rm -rf autom4te.cache config.log config.status config/config.h Makefile
+
+if $recheck; then
+    # This bizarre statement has to do with how config.status quotes its output
+    echo exec sh configure $config | sh -
+fi