1 files changed, 86 insertions, 0 deletions
diff --git a/tests/scripts/variables/SHELL b/tests/scripts/variables/SHELL
new file mode 100644
index 0000000..7b7e7fe
--- /dev/null
+++ b/tests/scripts/variables/SHELL
@@ -0,0 +1,86 @@
+#                                                                    -*-perl-*-
+
+$description = "Test proper handling of SHELL.";
+
+# Find the default value when SHELL is not set.  On UNIX it will be /bin/sh,
+# but on other platforms who knows?
+resetENV();
+delete $ENV{SHELL};
+$mshell = `echo 'all:;\@echo \$(SHELL)' | $make_path -f-`;
+chop $mshell;
+
+# According to POSIX, the value of SHELL in the environment has no impact on
+# the value in the makefile.
+# Note %extraENV takes precedence over the default value for the shell.
+
+$extraENV{SHELL} = '/dev/null';
+run_make_test('all:;@echo "$(SHELL)"', '', $mshell);
+
+# According to POSIX, any value of SHELL set in the makefile should _NOT_ be
+# exported to the subshell!  I wanted to set SHELL to be $^X (perl) in the
+# makefile, but make runs $(SHELL) -c 'commandline' and that doesn't work at
+# all when $(SHELL) is perl :-/.  So, we just add an extra initial /./ which
+# works well on UNIX and seems to work OK on at least some non-UNIX systems.
+
+$extraENV{SHELL} = $mshell;
+
+run_make_test("SHELL := /./$mshell\n".'
+all:;@echo "$(SHELL) $$SHELL"
+', '', "/./$mshell $mshell");
+
+# As a GNU make extension, if make's SHELL variable is explicitly exported,
+# then we really _DO_ export it.
+
+$extraENV{SHELL} = $mshell;
+
+run_make_test("export SHELL := /./$mshell\n".'
+all:;@echo "$(SHELL) $$SHELL"
+', '', "/./$mshell /./$mshell");
+
+
+# Test out setting of SHELL, both exported and not, as a target-specific
+# variable.
+
+$extraENV{SHELL} = $mshell;
+
+run_make_test("all: SHELL := /./$mshell\n".'
+all:;@echo "$(SHELL) $$SHELL"
+', '', "/./$mshell $mshell");
+
+$extraENV{SHELL} = $mshell;
+
+run_make_test("
+SHELL := /././$mshell
+one: two
+two: export SHELL := /./$mshell\n".'
+one two:;@echo "$@: $(SHELL) $$SHELL"
+', '', "two: /./$mshell /./$mshell\none: /././$mshell $mshell\n");
+
+# Test .SHELLFLAGS
+
+# We don't know the output here: on Solaris for example, every line printed
+# by the shell in -x mode has a trailing space (!!)
+my $script = 'true; true';
+my $flags = '-xc';
+my $out = `/bin/sh $flags '$script' 2>&1`;
+
+run_make_test(qq!
+.SHELLFLAGS = $flags
+all: ; \@$script
+!,
+              '', $out);
+
+# We can't just use "false" because on different systems it provides a
+# different exit code--once again Solaris: false exits with 255 not 1
+$script = 'true; false; true';
+$flags = '-xec';
+$out = `/bin/sh $flags '$script' 2>&1`;
+my $err = $? >> 8;
+
+run_make_test(qq!
+.SHELLFLAGS = $flags
+all: ; \@$script
+!,
+              '', "$out#MAKE#: *** [all] Error $err\n", 512);
+
+1;