[PATCH] VxWorks Support

Recent versions of VxWorks support fork() and as result can support dash.
For example,  to cross compile for IA with this patch applied,  and your VSB environment sourced (aka sysroot)
  
./configure --build=x86_64-pc-linux-gnu --host=x86_64-wrs-vxworks --prefix=/usr \
    CC=wr-cc CXX=wr-c++ LD=wr-ld AR=wr-ar NM=wr-nm OBJCOPY=wr-objcopy OBJDUMP=wr-objdump RANLIB=wr-ranlib READELF=wr-readelf SIZE=wr-size STRIP= wr-strip \
    ac_cv_func_faccessat=no    \
    CFLAGS="-DJOBS=0 "

make install DESTDIR=${VSB}/usr/3pp/develop

For other architectures update your <host> appropriately. 

---
configure.ac     | 4 ++--
 src/bltin/test.c | 2 ++
 src/jobs.c       | 4 ++++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index ba4856a..bb09534 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ AC_ARG_ENABLE(glob, AS_HELP_STRING(--enable-glob, [Use glob(3) from libc]))
 dnl Checks for libraries.
 
 dnl Checks for header files.
-AC_CHECK_HEADERS(alloca.h paths.h)
+AC_CHECK_HEADERS(alloca.h paths.h sys/wait.h)
 
 dnl Check for declarations
 AC_CHECK_DECL([_PATH_BSHELL],,AC_DEFINE_UNQUOTED([_PATH_BSHELL], "/bin/sh", [Define to system shell path]),[
@@ -89,7 +89,7 @@ dnl Checks for library functions.
 AC_CHECK_FUNCS(bsearch faccessat getpwnam getrlimit isalpha killpg \
 	       memfd_create memrchr mempcpy \
 	       sigsetmask stpcpy strchrnul strsignal strtod strtoimax \
-	       strtoumax sysconf tee)
+	       strtoumax sysconf tee wait3)
 
 dnl Check whether it's worth working around FreeBSD PR kern/125009.
 dnl The traditional behavior of access/faccessat is crazy, but
diff --git a/src/bltin/test.c b/src/bltin/test.c
index 6d844f1..0323944 100644
--- a/src/bltin/test.c
+++ b/src/bltin/test.c
@@ -418,8 +418,10 @@ filstat(char *nm, enum token mode)
 		return (s.st_mode & S_ISUID) != 0;
 	case FILSGID:
 		return (s.st_mode & S_ISGID) != 0;
+#ifdef S_ISVTX
 	case FILSTCK:
 		return (s.st_mode & S_ISVTX) != 0;
+#endif
 	case FILGZ:
 		return !!s.st_size;
 	case FILUID:
diff --git a/src/jobs.c b/src/jobs.c
index 51e6fa1..8d6ecf7 100644
--- a/src/jobs.c
+++ b/src/jobs.c
@@ -1202,7 +1202,11 @@ waitproc(int block, int *status)
 	do {
 		gotsigchld = 0;
 		do
+#ifdef HAVE_WAIT3 		
 			err = wait3(status, flags, NULL);
+#else			
+			err = waitpid((pid_t)-1, status, flags, NULL);
+#endif		
 		while (err < 0 && errno == EINTR);
 
 		if (err || (err = -!block))