Introduce EXIM_BUILD_SUFFIX for src/Makefile and testsuite

This enables parallel builds in a shared directory, if they have
the same os-type and arch-type. Think about EXIM_BUILD_SUFFIX
as 'name of your linux distro'

3 files changed, 10 insertions, 1 deletions

diff --git a/test/t/00-basic.t b/test/t/00-basic.t
index 99a3e5fbd..ae8eff77d 100644
--- a/test/t/00-basic.t
+++ b/test/t/00-basic.t
@@ -5,7 +5,7 @@ use Test::Exception;
 use lib 'lib';
 use_ok 'Exim::Runtest', qw(:all) or BAIL_OUT 'Can not load the module';
 
-can_ok 'Exim::Runtest', qw(mailgroup dynamic_socket);
+can_ok 'Exim::Runtest', qw(mailgroup dynamic_socket exim_binary);
 pod_coverage_ok 'Exim::Runtest' => 'docs complete';
 
 subtest 'mailgroup' => sub {
@@ -31,5 +31,12 @@ subtest 'dynamic_socket' => sub {
     $socket->close;
 };
 
+subtest 'exim_binary' => sub {
+    my @argv1 = qw(/bin/sh a b);
+    my @argv2 = qw(t/samples/foo a b);
+    chomp(my $cwd = `pwd`); # don't use Cwd, as we use Cwd in the tested module already
+    is_deeply [exim_binary(@argv1)], \@argv1 => 'got the binary as abs path from argv';
+    is_deeply [exim_binary(@argv2)], ["$cwd/t/samples/foo", @argv2[1,$#argv2]] => 'got the binary as rel path from argv';
+};
 
 done_testing;
diff --git a/test/t/samples/foo b/test/t/samples/foo
new file mode 100755
index 000000000..0e748db3f
--- /dev/null
+++ b/test/t/samples/foo
@@ -0,0 +1,2 @@
+# this file solely exists to be tested as
+# an executable from one of the tests in t/
diff --git a/test/t/samples/src/.directory b/test/t/samples/src/.directory
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/test/t/samples/src/.directory