From 2b9828f303defc09cafa9f070d3583b4f1ac3107 Mon Sep 17 00:00:00 2001
From: Mathieu Lirzin <mthl@gnu.org>
Date: Thu, 23 Feb 2017 02:01:08 +0100
Subject: build: Remove "--enable-debug" configure option

Unlike C code where debugging impose the "-g" compilation flags.  This
debugging option only affects Guile code, so using an environment variable
works better since it doesn't impose to recompile Mcron or to edit
"config.scm".

* configure.ac: Remove "--enable-debug" configure option.
* src/mcron/config.scm.in (config-debug): Use MCRON_DEBUG environment variable
to trigger the debug mode at runtime.
---
 configure.ac            | 14 --------------
 src/mcron/config.scm.in |  9 ++++++++-
 2 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/configure.ac b/configure.ac
index e7ff80c..c818dba 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,20 +29,6 @@ AC_REQUIRE_AUX_FILE([git-version-gen])
 AM_INIT_AUTOMAKE([subdir-objects -Wall -Wno-override])
 AM_SILENT_RULES([yes])		# enables silent rules by default
 
-AC_MSG_CHECKING([whether debugging is requested])
-AC_ARG_ENABLE(debug,
-              AC_HELP_STRING([--enable-debug],
-                             [enable debugging and traceback on error]),
-              CONFIG_DEBUG=$enableval,
-              CONFIG_DEBUG=no)
-AC_MSG_RESULT($CONFIG_DEBUG)
-if test "$CONFIG_DEBUG" = "no"; then
-   CONFIG_DEBUG="#f"
-else
-   CONFIG_DEBUG="#t"
-fi
-AC_SUBST(CONFIG_DEBUG)
-
 AC_CANONICAL_HOST
 AC_PROG_AWK
 AC_PROG_EGREP
diff --git a/src/mcron/config.scm.in b/src/mcron/config.scm.in
index 2b0bc7f..e6a0e07 100644
--- a/src/mcron/config.scm.in
+++ b/src/mcron/config.scm.in
@@ -19,7 +19,6 @@
 
 (define-module (mcron config))
 
-(define-public config-debug @CONFIG_DEBUG@)
 (define-public config-package-name "@PACKAGE_NAME@")
 (define-public config-package-version "@PACKAGE_VERSION@")
 (define-public config-package-string "@PACKAGE_STRING@")
@@ -33,3 +32,11 @@
 (define-public config-deny-file "@CONFIG_DENY_FILE@")
 (define-public config-pid-file "@CONFIG_PID_FILE@")
 (define-public config-tmp-dir "@CONFIG_TMP_DIR@")
+
+;;;
+;;; Runtime configuration
+;;;
+
+(define-public config-debug
+  ;; Trigger the display of Guile stack traces on errors.
+  (getenv "MCRON_DEBUG"))
-- 
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