Improve build system

Add support for toggling debug on and off and for using GNU Readline
or not.

1 files changed, 32 insertions, 4 deletions

diff --git a/configure.ac b/configure.ac
index 50df1af..0747857 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,10 +4,38 @@ AM_INIT_AUTOMAKE([-Wall -Werror, foreign])
 
 AC_PROG_CC
 
-if [ ! -d "./linenoise/" ]
-then
-  git clone --depth=1 'https://github.com/antirez/linenoise.git'
-fi
+AH_TEMPLATE([USE_READLINE], [do we use GNU Readline ?])
+AC_DEFUN([LINENOISE_URL], [https://github.com/antirez/linenoise.git])
+
+AC_CHECK_LIB([readline],
+  [readline],
+  [AC_DEFINE([USE_READLINE], [1])
+  use_readline=true
+  AC_ARG_WITH([readline],
+    AS_HELP_STRING([--without-readline],
+      [do not use GNU Readline, and use the Linenoise library
+      available at LINENOISE_URL]),
+    if test ! -d "./linenoise/"
+    then
+      git clone --depth=1 'LINENOISE_URL'
+    fi
+    AC_DEFINE([USE_READLINE], [0])
+    use_readline=false
+  )],
+  [AC_DEFINE([USE_READLINE], [0])
+  use_readline=true]
+)
+
+AM_CONDITIONAL([USE_READLINE_COND], [test x$use_readline = xtrue])
+
+AC_ARG_ENABLE([debug],
+  [AS_HELP_STRING([--enable-debug],
+    [enable debugging, only useful for development])],
+  [debug=true],
+  [debug=false]
+)
+
+AM_CONDITIONAL([DEBUG_COND], [test x$debug = xtrue])
 
 AC_CONFIG_FILES([
   Makefile