wrapper: Move 'wrap_env_path' to a new 'utils' module.

* src/wrapper.c: Move 'wrap_env_path' to ...
* src/utils.h: ... here.  New module.
* src/utils.c: New file.
* configure.ac: Use AC_PROG_RANLIB and AM_PROG_AR.
* Makefile.am (noinst_LIBRARIES, src_libmcron_a_SOURCES): New variables.
(LDADD): Add 'src/libmcron.a'.

1 files changed, 27 insertions, 0 deletions

diff --git a/src/utils.h b/src/utils.h
new file mode 100644
index 0000000..5a71afd
--- /dev/null
+++ b/src/utils.h
@@ -0,0 +1,27 @@
+/* utils.h -- Utility functions.
+   Copyright © 2017 Mathieu Lirzin <mthl@gnu.org>
+
+   This file is part of GNU Mcron.
+
+   GNU Mcron is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   GNU Mcron is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GNU Mcron.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef MCRON_UTILS_H
+#define MCRON_UTILS_H
+
+/**
+   Append DIR in front of ENVAR environment variable value.  If ENVAR is not
+   defined, then define it with DIR.  Bail out if something went wrong.  */
+extern void wrap_env_path (const char *envar, const char *dir);
+
+#endif /* MCRON_UTILS_H */