- fix toggling thread implementation.

  Previously the old headers were left in include/ leading to spurious compile failures.
  This is ugly as it can get (we resort to sneaking -L in for the moment) but
  good enough for now. The worst thing which can happen is that we ln these
  headers once per invocation of make, nothing more.
  If some installation of make(1) complains about the "-L" then wrap it in
  ifneq ($(findstring check-symlink,$(.FEATURES)),)

Makefile.in

@@ -61,6 +61,11 @@ include/bits/uClibc_config.h: extra/config/conf .config $(top_srcdir)extra/scrip
 	$(Q)$(top_srcdir)extra/scripts/conf-header.sh .config > $@
 	$(Q)$(MAKE) headers-y
 
+# The above doesn't work for threads, though. Just using check-symlinks for now.
+# XXX: FIXME: this is ugly
+MAKEFLAGS += -L
+include/config/linuxthreads/old.h include/config/linuxthreads/new.h:
+
 # For the moment, we have to keep re-running this target
 # because the fix includes scripts rely on pre-processers
 # in order to generate the headers correctly :(.  That

extra/Configs/Config.in

@@ -403,6 +403,10 @@ config LINUXTHREADS_OLD
 	  the latest code from glibc, so it may be the only choice for the
 	  newer ports (like alpha/amd64/64bit arches and hppa).
 
+config LINUXTHREADS_NEW
+	def_bool y
+	depends on !LINUXTHREADS_OLD
+
 config UCLIBC_HAS_SYSLOG
 	bool "Syslog support"
 	default y

libpthread/linuxthreads.old/Makefile.in

@@ -71,9 +71,6 @@ libpthread-so-y += $(libpthread_OBJ:.o=.os) $(libpthread-shared-y)
 
 lib-a-$(UCLIBC_HAS_THREADS) += $(top_builddir)lib/libpthread.a
 lib-so-$(UCLIBC_HAS_THREADS) += $(top_builddir)lib/libpthread.so
-objclean-y += libpthread_clean
-headers-$(UCLIBC_HAS_THREADS) += linuxthreads_headers
-headers_clean-y += linuxthreads_headers_clean
 
 #ifeq ($(DOMULTI),n)
 $(top_builddir)lib/libpthread.so: $(libpthread_OUT)/libpthread_so.a $(libc.depend)
@@ -111,13 +108,17 @@ include/semaphore.h:
 	$(do_ln) ../$(PTDIR)/$(@F) $(top_builddir)$@
 include/bits/pthreadtypes.h: | include/bits
 	$(do_ln) ../../$(PTDIR)/sysdeps/pthread/bits/$(@F) $(top_builddir)$@
-linuxthreads_headers: include/pthread.h include/semaphore.h \
+
+linuxthreads_headers := include/pthread.h include/semaphore.h \
 			include/bits/pthreadtypes.h
+$(linuxthreads_headers): include/config/linuxthreads/old.h \
+	    include/config/linuxthreads/new.h
+headers-$(UCLIBC_HAS_THREADS) += $(linuxthreads_headers)
 
+objclean-y += libpthread_clean
+headers_clean-y += linuxthreads_headers_clean
 linuxthreads_headers_clean:
-	$(RM) $(top_builddir)include/pthread.h \
-		$(top_builddir)include/semaphore.h \
-		$(top_builddir)include/bits/pthreadtypes.h
+	$(RM) $(addprefix $(top_builddir),$(linuxthreads_headers))
 
 libpthread_clean:
 	$(RM) $(libpthread_OUT)/*.{o,os,oS,a}

libpthread/linuxthreads.old_db/Makefile.in

@@ -33,9 +33,6 @@ endif
 
 lib-a-$(PTHREADS_DEBUG_SUPPORT) += $(top_builddir)lib/libthread_db.a
 lib-so-$(PTHREADS_DEBUG_SUPPORT) += $(top_builddir)lib/libthread_db.so
-objclean-y += libthread_db_clean
-headers-$(PTHREADS_DEBUG_SUPPORT) += linuxthreads_db_headers
-headers_clean-y += linuxthreads_db_headers_clean
 
 #ifeq ($(DOMULTI),n)
 ifeq ($(DOPIC),y)
@@ -62,8 +59,16 @@ $(top_builddir)lib/libthread_db.a: $(libthread_db-a-y)
 	$(Q)$(RM) $@
 	$(do_ar)
 
-linuxthreads_db_headers:
-	$(Q)$(LN) -sf ../$(PTDIR)_db/thread_db.h $(top_builddir)include/
+include/thread_db.h:
+	$(do_ln) ../$(PTDIR)_db/$(@F) $(top_builddir)$@
+
+linuxthreads_db_headers := include/thread_db.h
+$(linuxthreads_db_headers): include/config/linuxthreads/old.h \
+	    include/config/linuxthreads/new.h
+headers-$(PTHREADS_DEBUG_SUPPORT) += $(linuxthreads_db_headers)
+
+objclean-y += libthread_db_clean
+headers_clean-y += linuxthreads_db_headers_clean
 
 linuxthreads_db_headers_clean:
 	$(RM) $(top_builddir)include/thread_db.h

libpthread/linuxthreads/Makefile.in

@@ -81,9 +81,6 @@ libpthread-so-y += $(libpthread_OBJ:.o=.oS)
 
 lib-a-$(UCLIBC_HAS_THREADS) += $(top_builddir)lib/libpthread.a
 lib-so-$(UCLIBC_HAS_THREADS) += $(top_builddir)lib/libpthread.so
-objclean-y += libpthread_clean
-headers-$(UCLIBC_HAS_THREADS) += linuxthreads_headers
-headers_clean-y += linuxthreads_headers_clean
 
 #ifeq ($(DOMULTI),n)
 $(top_builddir)lib/libpthread.so: $(libpthread_OUT)/libpthread_so.a $(libc.depend) $(top_builddir)lib/libpthread_nonshared.a
@@ -124,13 +121,17 @@ include/semaphore.h:
 	$(do_ln) ../$(PTDIR)/$(@F) $(top_builddir)$@
 include/bits/pthreadtypes.h: | include/bits
 	$(do_ln) ../../$(PTDIR)/sysdeps/pthread/bits/$(@F) $(top_builddir)$@
-linuxthreads_headers: include/pthread.h include/semaphore.h \
+
+linuxthreads_headers := include/pthread.h include/semaphore.h \
 			include/bits/pthreadtypes.h
+$(linuxthreads_headers): include/config/linuxthreads/old.h \
+	    include/config/linuxthreads/new.h
+headers-$(UCLIBC_HAS_THREADS) += $(linuxthreads_headers)
 
+objclean-y += libpthread_clean
+headers_clean-y += linuxthreads_headers_clean
 linuxthreads_headers_clean:
-	$(RM) $(top_builddir)include/pthread.h \
-		$(top_builddir)include/semaphore.h \
-		$(top_builddir)include/bits/pthreadtypes.h
+	$(RM) $(addprefix $(top_builddir),$(linuxthreads_headers))
 
 libpthread_clean:
 	$(RM) $(libpthread_OUT)/{,*/,*/*/,*/*/*/,*/*/*/*/}*.{o,os,oS,a}

libpthread/linuxthreads_db/Makefile.in

@@ -33,9 +33,6 @@ endif
 
 lib-a-$(PTHREADS_DEBUG_SUPPORT) += $(top_builddir)lib/libthread_db.a
 lib-so-$(PTHREADS_DEBUG_SUPPORT) += $(top_builddir)lib/libthread_db.so
-objclean-y += libthread_db_clean
-headers-$(PTHREADS_DEBUG_SUPPORT) += linuxthreads_db_headers
-headers_clean-y += linuxthreads_db_headers_clean
 
 #ifeq ($(DOMULTI),n)
 ifeq ($(DOPIC),y)
@@ -62,8 +59,16 @@ $(top_builddir)lib/libthread_db.a: $(libthread_db-a-y)
 	$(Q)$(RM) $@
 	$(do_ar)
 
-linuxthreads_db_headers:
-	$(Q)$(LN) -sf ../$(PTDIR)_db/thread_db.h $(top_builddir)include/
+include/thread_db.h:
+	$(do_ln) ../$(PTDIR)_db/$(@F) $(top_builddir)$@
+
+linuxthreads_db_headers := include/thread_db.h
+$(linuxthreads_db_headers): include/config/linuxthreads/old.h \
+	    include/config/linuxthreads/new.h
+headers-$(PTHREADS_DEBUG_SUPPORT) += $(linuxthreads_db_headers)
+
+objclean-y += libthread_db_clean
+headers_clean-y += linuxthreads_db_headers_clean
 
 linuxthreads_db_headers_clean:
 	$(RM) $(top_builddir)include/thread_db.h