make: fixes to -q option

The -q option returns an exit status to indicate if targets are
up-to-date (0) or in need of updating (1) but without updating
them.  As an exception (imported from GNU make) build commands
with a '+' prefix are executed.

pdpmake didn't implement the exception.  Doing so required moving
handling of the -q option down into docmds().

Saves 48 bytes.

1 files changed, 7 insertions, 0 deletions

diff --git a/testsuite/make.tests b/testsuite/make.tests
index c2b62532a..e4d635141 100755
--- a/testsuite/make.tests
+++ b/testsuite/make.tests
@@ -116,6 +116,13 @@ bar:
 baz:
         @:
 '
+# Build commands with a '+' prefix are executed even with the -q option.
+testing "make execute build command with + prefix and -q" \
+        "make -q -f - 2>/dev/null" "OK\n" "" '
+all: bar
+bar:
+        @+echo OK
+'
 
 # The -t option touches files that are out-of-date unless the target
 # has no commands or they're already up-to-date.