project: banish need for C compiler

This patch gets rid of the thin veneer that we currently have around the three
executables.  This was done for historical reasons (circa 2003 Guile couldnʼt
deal with process signals and forks).  In fact these problems were fixed many
moons ago, and there is now no need for it.  The project becomes 100% Guile!

Many files are affected; interested coders should use the GIT repository to
understand the details of all the changes.

1 files changed, 24 insertions, 31 deletions

diff --git a/configure.ac b/configure.ac
index 768a94c..fb19229 100755
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 ## Process this file with autoconf to produce a configure script.
-# Copyright © 2003, 2005, 2012, 2014 Dale Mellor
-# <dale_mellor@users.sourceforge.net>
+#
+# Copyright © 2003, 2005, 2012, 2014 Dale Mellor <mcron-lsfnyl@rdmp.org>
 # Copyright © 2015, 2016, 2017, 2018 Mathieu Lirzin <mthl@gnu.org>
 # Copyright © 2018 宋文武 <iyzsong@member.fsf.org>
 #
@@ -20,19 +20,18 @@
 # along with GNU Mcron.  If not, see <http://www.gnu.org/licenses/>.
 
 AC_PREREQ(2.61)
-AC_INIT([GNU Mcron], [1.1.4], [bug-mcron@gnu.org])
-AC_CONFIG_SRCDIR([src/mcron.c])
+AC_INIT([GNU Mcron], [1.1.4+], [bug-mcron@gnu.org])
+AC_CONFIG_SRCDIR([src/mcron/scripts/mcron.scm])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_REQUIRE_AUX_FILE([test-driver.scm])
-AM_INIT_AUTOMAKE([subdir-objects -Wall -Wno-override std-options])
-AM_SILENT_RULES([yes])		# enables silent rules by default
+
+dnl We're fine with GNU make constructs, hence '-Wno-portability'.
+AM_INIT_AUTOMAKE([1.11 gnu silent-rules subdir-objects color-tests
+                  -Wall -Wno-override -Wno-portability std-options])
+
+AM_SILENT_RULES([yes])		# Enables silent rules by default.
 
 AC_CANONICAL_HOST
-AC_PROG_AWK
-AC_PROG_EGREP
-AM_PROG_CC_C_O
-AC_PROG_RANLIB
-AM_PROG_AR
 
 # Check for Guile development files.
 GUILE_PKG([3.0 2.2 2.0])
@@ -41,12 +40,6 @@ GUILE_PKG([3.0 2.2 2.0])
 # 'config.rpath' script.
 PKG_CHECK_MODULES(GUILE, [guile-$GUILE_EFFECTIVE_VERSION])
 
-# Check for 'argp' program arguments parser.
-AC_CHECK_FUNC(argp_parse, [], AC_MSG_ERROR([argp not found]))
-
-# Check for non-POSIX string formatting function.
-AC_CHECK_FUNC(asprintf, [], AC_MSG_ERROR([asprintf not found]))
-
 # Checks for programs.
 
 GUILE_PROGS
@@ -76,8 +69,8 @@ AC_MSG_CHECKING([which spool directory to use])
 AC_ARG_WITH(spool-dir,
             AC_HELP_STRING([--with-spool-dir],
                            [the crontab spool directory (/var/cron/tabs)]),
-              CONFIG_SPOOL_DIR=$withval,
-              CONFIG_SPOOL_DIR=[/var/cron/tabs])
+            CONFIG_SPOOL_DIR=$withval,
+            CONFIG_SPOOL_DIR=[/var/cron/tabs])
 AC_MSG_RESULT($CONFIG_SPOOL_DIR)
 AC_SUBST(CONFIG_SPOOL_DIR)
 
@@ -85,8 +78,8 @@ AC_MSG_CHECKING([name of socket])
 AC_ARG_WITH(socket-file,
             AC_HELP_STRING([--with-socket-file],
                            [unix pathname for cron socket (/var/cron/socket)]),
-              CONFIG_SOCKET_FILE=$withval,
-              CONFIG_SOCKET_FILE=[/var/cron/socket])
+            CONFIG_SOCKET_FILE=$withval,
+            CONFIG_SOCKET_FILE=[/var/cron/socket])
 AC_MSG_RESULT($CONFIG_SOCKET_FILE)
 AC_SUBST(CONFIG_SOCKET_FILE)
 
@@ -94,8 +87,8 @@ AC_MSG_CHECKING([name of allow file])
 AC_ARG_WITH(allow-file,
             AC_HELP_STRING([--with-allow-file],
                            [the file of allowed users (/var/cron/allow)]),
-              CONFIG_ALLOW_FILE=$withval,
-              CONFIG_ALLOW_FILE=[/var/cron/allow])
+            CONFIG_ALLOW_FILE=$withval,
+            CONFIG_ALLOW_FILE=[/var/cron/allow])
 AC_MSG_RESULT($CONFIG_ALLOW_FILE)
 AC_SUBST(CONFIG_ALLOW_FILE)
 
@@ -103,8 +96,8 @@ AC_MSG_CHECKING([name of deny file])
 AC_ARG_WITH(deny-file,
             AC_HELP_STRING([--with-deny-file],
                            [the file of barred users (/var/cron/deny)]),
-              CONFIG_DENY_FILE=$withval,
-              CONFIG_DENY_FILE=[/var/cron/deny])
+            CONFIG_DENY_FILE=$withval,
+            CONFIG_DENY_FILE=[/var/cron/deny])
 AC_MSG_RESULT($CONFIG_DENY_FILE)
 AC_SUBST(CONFIG_DENY_FILE)
 
@@ -112,8 +105,8 @@ AC_MSG_CHECKING([name of PID file])
 AC_ARG_WITH(pid-file,
             AC_HELP_STRING([--with-pid-file],
                            [the file to record cron's PID (/var/run/cron.pid)]),
-              CONFIG_PID_FILE=$withval,
-              CONFIG_PID_FILE=[/var/run/cron.pid])
+            CONFIG_PID_FILE=$withval,
+            CONFIG_PID_FILE=[/var/run/cron.pid])
 AC_MSG_RESULT($CONFIG_PID_FILE)
 AC_SUBST(CONFIG_PID_FILE)
 
@@ -121,19 +114,19 @@ AC_MSG_CHECKING([directory to hold temporary files])
 AC_ARG_WITH(tmp-dir,
             AC_HELP_STRING([--with-tmp-dir],
                            [directory to hold temporary files (/tmp)]),
-              CONFIG_TMP_DIR=$withval,
-              CONFIG_TMP_DIR=[/tmp])
+            CONFIG_TMP_DIR=$withval,
+            CONFIG_TMP_DIR=[/tmp])
 AC_MSG_RESULT($CONFIG_TMP_DIR)
 AC_SUBST(CONFIG_TMP_DIR)
 
 # Include the Maintainer's Makefile fragment, if it's here.
 MAINT_MAKEFILE=/dev/null
 AS_IF([test -r "$srcdir/maint.mk"],
-  [MAINT_MAKEFILE="$srcdir/maint.mk"])
+      [MAINT_MAKEFILE="$srcdir/maint.mk"])
 AC_SUBST_FILE([MAINT_MAKEFILE])
 
 AC_CONFIG_FILES([pre-inst-env:build-aux/pre-inst-env.in],
-  [chmod +x pre-inst-env])
+                [chmod +x pre-inst-env])
 AC_CONFIG_FILES([doc/config.texi
                  Makefile
                  src/mcron/config.scm])