Fix the test build system by installing headers on a local folder
instead of using internal headers.

Index: test/Rules.mak
===================================================================
--- test/Rules.mak	(revision 22609)
+++ test/Rules.mak	(working copy)
@@ -79,7 +79,11 @@
 XWARNINGS      := $(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes
 XARCH_CFLAGS   := $(subst ",, $(strip $(ARCH_CFLAGS))) $(CPU_CFLAGS)
 XCOMMON_CFLAGS := -D_GNU_SOURCE -I$(top_builddir)test
-CFLAGS         += $(XWARNINGS) $(OPTIMIZATION) $(XCOMMON_CFLAGS) $(XARCH_CFLAGS) -I$(top_builddir)include $(PTINC)
+CFLAGS         := $(XWARNINGS) $(OPTIMIZATION) $(XCOMMON_CFLAGS) $(XARCH_CFLAGS) -nostdinc -I$(top_builddir)$(LOCAL_INSTALL_PATH)/usr/include
+
+CC_IPREFIX:=$(shell $(CC) --print-file-name=include)
+CFLAGS += -I$(CC_IPREFIX)
+
 HOST_CFLAGS    += $(XWARNINGS) $(OPTIMIZATION) $(XCOMMON_CFLAGS)
 
 LDFLAGS        := $(CPU_LDFLAGS)
@@ -97,11 +101,12 @@
 	LDFLAGS       += -static
 	HOST_LDFLAGS  += -static
 endif
+
 LDFLAGS += -B$(top_builddir)lib -Wl,-rpath,$(top_builddir)lib -Wl,-rpath-link,$(top_builddir)lib
 UCLIBC_LDSO_ABSPATH=$(shell pwd)
 ifdef TEST_INSTALLED_UCLIBC
 LDFLAGS += -Wl,-rpath,./
-UCLIBC_LDSO_ABSPATH=/lib
+UCLIBC_LDSO_ABSPATH=$(SHARED_LIB_LOADER_PREFIX)
 endif
 
 ifeq ($(findstring -static,$(LDFLAGS)),)
Index: Rules.mak
===================================================================
--- Rules.mak	(revision 22609)
+++ Rules.mak	(working copy)
@@ -632,3 +632,5 @@
 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 endif
+
+LOCAL_INSTALL_PATH := install_dir
Index: Makefile.in
===================================================================
--- Makefile.in	(revision 22609)
+++ Makefile.in	(working copy)
@@ -66,7 +66,7 @@
 ifneq ($(TARGET_SUBARCH),)
 HEADERS_BITS_SUBARCH := $(notdir $(wildcard $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/bits/$(TARGET_SUBARCH)/*.h))
 endif
-HEADERS_BITS_COMMON := $(filter-out $(HEADERS_BITS_ARCH) $(HEADERS_BITS_SUBARCH),$(HEADERS_BITS_COMMON))
+HEADERS_BITS_COMMON := $(filter-out $(HEADERS_BITS_ARCH) $(HEADERS_BITS_SUBARCH) $(HEADERS_BITS_PTHREAD),$(HEADERS_BITS_COMMON))
 
 HEADERS_SYS_COMMON := $(notdir $(wildcard $(top_srcdir)libc/sysdeps/linux/common/sys/*.h))
 HEADERS_SYS_ARCH := $(notdir $(wildcard $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/sys/*.h))
@@ -152,6 +152,15 @@
 		mv -f $$tmp include/bits/sysnum.h; \
 	fi
 
+$(LOCAL_INSTALL_PATH):
+	$(Q)$(MAKE) PREFIX=$(shell pwd)/ RUNTIME_PREFIX=./ \
+	DEVEL_PREFIX=$(LOCAL_INSTALL_PATH)/usr/ \
+	HOSTCC="$(HOSTCC)" \
+	install_kernel_headers
+	$(Q)$(MAKE) PREFIX=$(shell pwd)/ RUNTIME_PREFIX=./ \
+	DEVEL_PREFIX=$(LOCAL_INSTALL_PATH)/usr/ \
+	HOSTCC="$(HOSTCC)" \
+	install_dev
 
 install: install_runtime install_dev
 
@@ -451,7 +460,8 @@
 	$(Q)$(RM) -r lib include/bits
 	$(RM) ldso/*/*.a libpthread/*/*.a libc/*.a libcrypt/*.a libintl/*.a \
 		libm/*.a libnsl/*.a libpthread/*.a libresolv/*.a librt/*.a \
-		libutil/*.a lib/*.a
+		libutil/*.a lib/*.a \
+		include/fpu_control.h include/dl-osinfo.h include/hp-timing.h
 	$(MAKE) objclean-y headers_clean-y
 	$(MAKE) -s -C test clean
 	$(MAKE) -C utils utils_clean
@@ -466,6 +476,7 @@
 	fi
 	@$(RM) include/linux include/asm*
 	$(RM) $(top_builddir)extra/scripts/unifdef
+	$(RM) -r $(LOCAL_INSTALL_PATH)
 
 distclean: clean
 	-find . \( -name core -o -name \*.orig -o -name \*~ -o -name .\*.dep \) -exec $(RM) {} \;
@@ -481,3 +492,6 @@
 
 test check:
 	$(Q)$(MAKE) -C test
+
+test_compile: $(LOCAL_INSTALL_PATH)
+	$(Q)$(MAKE) -C test compile