nss: restore manual pre-dependency build

We had some seldom build failures on Windows, with errors like:
PermissionError: [WinError 32] The process cannot access the file
because it is being used by another process: '..../nssckmdt.h'.

This happens, because of the "." / parent shell hack. Thinking
about it again, it doesn't prevent the parent make to run in
parallel to the "." directory make. So I tried to use a terminal
match-all rule like

ifneq (,$(filter .,$(DIRS)))
%::
# empty terminal rule triggered
$(error can't happen)
endif

to stop the original parent make, but that doesn't work and the
$(error ...) is triggered.

So AFAIK I'm out of options here and have to restore the old
manual pre-dependency build variant - still much better then no
parallel build.

An alternative idea was to put the rest of the rules.mk in the
"else" of the terminal rule, to skip all normal rules, but this
still leaves out all rules from the rest of the make-files,
which might result in some hard to debug errors.

This reverts my upstream patch 15608:744881490c78.

Change-Id: I9e2e9e1ec9f35697c7853c92f60434f514cba5ab
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103777
Tested-by: Jenkins
Reviewed-by: Tor Lillqvist <tml@collabora.com>
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
(cherry picked from commit d2f9c55e065d559de903d540da28502646714a24)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104837
Tested-by: Michael Stahl <michael.stahl@cib.de>
Reviewed-by: Michael Stahl <michael.stahl@cib.de>

2 files changed, 84 insertions, 0 deletions

diff --git a/external/nss/UnpackedTarball_nss.mk b/external/nss/UnpackedTarball_nss.mk
index 8fa1edd530cc..f49d55fab46e 100644
--- a/external/nss/UnpackedTarball_nss.mk
+++ b/external/nss/UnpackedTarball_nss.mk
@@ -24,6 +24,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,nss,\
     external/nss/nss.bzmozilla1238154.patch \
 	external/nss/nss-bz1646594.patch.1 \
     external/nss/macos-dlopen.patch.0 \
+    external/nss/nss-restore-manual-pre-dependencies.patch.1 \
     $(if $(filter iOS,$(OS)), \
         external/nss/nss-ios.patch) \
     $(if $(filter ANDROID,$(OS)), \
diff --git a/external/nss/nss-restore-manual-pre-dependencies.patch.1 b/external/nss/nss-restore-manual-pre-dependencies.patch.1
new file mode 100644
index 000000000000..ebcc5b48c540
--- /dev/null
+++ b/external/nss/nss-restore-manual-pre-dependencies.patch.1
@@ -0,0 +1,83 @@
+Revert of upstream:
+
+changeset:   15608:744881490c78
+user:        Jan-Marek Glogowski <glogow@fbihome.de>
+date:        Wed May 13 19:00:40 2020 +0000
+summary:     Bug 1637083 Replace pre-dependency with shell hack r=rrelyea
+
+--- b/nss/coreconf/rules.mk	Wed May 13 19:00:40 2020 +0000
++++ a/nss/coreconf/rules.mk	Tue May 12 21:33:43 2020 +0000
+@@ -31,21 +31,10 @@
+ USE_NT_C_SYNTAX=1
+ endif
+ 
+-# For whatever reason, "." can't be handled using make conditionals.
+-# Based on automake's SUBDIRS "." handling.
+ ifdef DIRS
+ ifndef IGNORE_DIRS
+-ifneq (,$(filter .,$(DIRS)))
+-TARGETS = $(NULL)
+-ALL_TRASH = $(NULL)
+-endif
+-
+ $(DIRS):
++	$(IGNORE_ERROR)@$(MAKE) -C $@ $(MAKECMDGOALS)
+-	$(IGNORE_ERROR)@if [ "$@" != "." ]; then \
+-		$(MAKE) -C $@ $(MAKECMDGOALS) ; \
+-	else \
+-		IGNORE_DIRS=1 $(MAKE) -C $@ $(MAKECMDGOALS) ; \
+-	fi
+ 	@$(CLICK_STOPWATCH)
+ endif
+ endif
+@@ -84,9 +73,7 @@
+ check: $(DIRS)
+ 
+ clean clobber: $(DIRS)
+-ifneq (,$(ALL_TRASH))
+ 	rm -rf $(ALL_TRASH)
+-endif
+ 
+ realclean clobber_all: $(DIRS)
+ 	rm -rf $(wildcard *.OBJ) dist $(ALL_TRASH)
+--- b/nss/lib/ckfw/builtins/manifest.mn	Wed May 13 19:00:40 2020 +0000
++++ a/nss/lib/ckfw/builtins/manifest.mn	Tue May 12 21:33:43 2020 +0000
+@@ -5,9 +5,7 @@
+ 
+ CORE_DEPTH = ../../..
+ 
++DIRS = testlib
+-DIRS = . testlib
+-
+-testlib: .
+ 
+ MODULE = nss
+ 
+--- b/nss/lib/ckfw/manifest.mn	Wed May 13 19:00:40 2020 +0000
++++ a/nss/lib/ckfw/manifest.mn	Tue May 12 21:33:43 2020 +0000
+@@ -5,9 +5,7 @@
+ 
+ CORE_DEPTH = ../..
+ 
++DIRS = builtins
+-DIRS = . builtins
+-
+-builtins: .
+ 
+ PRIVATE_EXPORTS = \
+ 	ck.h		  \
+--- b/nss/manifest.mn	Wed May 13 19:00:40 2020 +0000
++++ a/nss/manifest.mn	Tue May 12 21:33:43 2020 +0000
+@@ -23,6 +23,12 @@
+ 	# no real way to encode these in any sensible way
+ 	$(MAKE) -C coreconf/nsinstall program
+ 	$(MAKE) export
++	# pre-build child dir -> parent dir dependencies
++	# ckfw/builtins -> ckfw
++	IGNORE_DIRS=1 $(MAKE) -C lib/ckfw libs
++	# ckfw/builtins/testlib -> ckfw/builtins + base
++	$(MAKE) -C lib/base libs
++	IGNORE_DIRS=1 $(MAKE) -C lib/ckfw/builtins libs
+ 
+ all: prepare_build
+ 	$(MAKE) libs