[devhelp] build: print more information at the end of configure

[Sébastien Wilmet <swilmet src gnome org>]

commit 731767279cdd3f5de0fdb798d549bab5815fe951
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Mar 1 13:58:33 2017 +0100

    build: print more information at the end of configure

 configure.ac |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b27d3ac..df013ea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -111,6 +111,15 @@ docs/reference/Makefile
 
 AC_OUTPUT
 
-echo
-echo "Prefix:    $prefix"
-echo
+# Print a summary of the configuration
+echo "
+Configuration:
+
+       ${PACKAGE_NAME} version ${PACKAGE_VERSION}
+
+       Source code location:   ${srcdir}
+       Prefix:                 ${prefix}
+       Compiler:               ${CC}
+       API documentation:      ${enable_gtk_doc}
+       GObject introspection:  ${found_introspection}
+"