libpthread: Fix handling of SUBARCH includes

TARGET_SUBARCH can only ever be set if TARGET_ARCH is set.
Only include SUBARCH includes if SUBARCH is non-empty.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

diff --git a/Rules.mak b/Rules.mak
index 68c9d82..7270bf1 100644 (file)
--- a/Rules.mak
+++ b/Rules.mak
@@ -740,7 +740,7 @@ PTDIR := libpthread/$(PTNAME)
 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 PTINC:= -I$(top_builddir)$(PTDIR)                                      \
        -I$(top_srcdir)$(PTDIR)                                         \
-       $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
+       $(if $(TARGET_SUBARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
        -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)  \
        -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                \
        -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                  \