make: .NOTPARALLEL and .WAIT are special targets

Austin Group defect report 1437 has been accepted.  It describes
the special targets .NOTPARALLEL and .WAIT which are used to
influence the behaviour of parallel builds.

Since parallel builds aren't implemented in here they actually don't
't have much effect.

- For completeness they're flagged as special targets.

- .WAIT should be allowed as a prerequisite.

2 files changed, 16 insertions, 2 deletions

diff --git a/miscutils/make.c b/miscutils/make.c
index 431ac41d4..f50ffbbef 100644
--- a/miscutils/make.c
+++ b/miscutils/make.c
@@ -1358,6 +1358,8 @@ target_type(char *s)
                 ".SILENT",
                 ".SUFFIXES",
                 ".PHONY",
+                ".NOTPARALLEL",
+                ".WAIT",
         };
 
         if (*s != '.')
@@ -1738,6 +1740,8 @@ input(FILE *fd, int ilevel)
                                 files = gd.gl_pathv;
                         }
                         for (i = 0; i < nfile; ++i) {
+                                if (!posix && strcmp(files[i], ".WAIT") == 0)
+                                        continue;
                                 np = newname(files[i]);
                                 newdep(&dp, np);
                         }
diff --git a/testsuite/make.tests b/testsuite/make.tests
index c97950e95..35d3b7149 100755
--- a/testsuite/make.tests
+++ b/testsuite/make.tests
@@ -277,8 +277,6 @@ target:
         @echo "$(hello) 4"
 '
 
-cd .. || exit 1; rm -rf make.tempdir 2>/dev/null
-
 # Nested macro expansion is allowed.  This should be compatible
 # with other implementations.
 testing "make nested macro expansion" \
@@ -297,6 +295,18 @@ target:
         @echo 5 $($a$b$c)
 '
 
+# .WAIT is allowed as a prerequisite.  Since parallel builds aren't
+# implemented it doesn't have any effect.
+mkdir make.tempdir && cd make.tempdir || exit 1
+touch file1 file2
+testing "make .WAIT is allowed as a prerequisite" \
+        "make -f -" \
+        "file1 file2\n" "" '
+target: file1 .WAIT file2
+        @echo $^
+'
+cd .. || exit 1; rm -rf make.tempdir 2>/dev/null
+
 testing "make double-colon rule" \
         "make -f -" "target1\ntarget2\n" "" '
 target::