buildsys: add option to enable/disable building tests

When doing cross-compilation, the tests are meant to be run on the
target. However, they are currently not installed, so it does not make
sense to build tehm to start with.

Additionally, when doing a system for production, those tests are not
needed anyway.

Add a configure option to disable building the tests altogether.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

Makefile.am

@@ -1,5 +1,8 @@
 # Generic definitions
-SUBDIRS = lib doc utils test-tool tests examples
+SUBDIRS = lib doc utils test-tool examples
+if BUILD_TESTS
+SUBDIRS += tests
+endif
 
 ACLOCAL_AMFLAGS =-I m4
 AUTOMAKE_OPTIONS = foreign subdir-objects

configure.ac

@@ -47,6 +47,14 @@ AC_ARG_ENABLE([manpages],
 AM_CONDITIONAL(BUILD_MANPAGES,
                [expr "$ENABLE_MANPAGES" : yes > /dev/null 2>&1])
 
+AC_ARG_ENABLE([tests],
+              [AC_HELP_STRING([--enable-tests],
+                              [Enable building tests])],
+              [ENABLE_TESTS=$enableval],
+              [ENABLE_TESTS=yes])
+AM_CONDITIONAL([BUILD_TESTS],
+               [expr "$ENABLE_TESTS" : yes > /dev/null 2>&1])
+
 AC_CONFIG_HEADER(config.h)
 
 AC_CHECK_LIB([gcrypt], [gcry_control])