From b65228c08b17b361dd97fa24d9677ab165b3638b Mon Sep 17 00:00:00 2001
From: Jason Gross <jagro@google.com>
Date: Tue, 19 Jul 2016 10:22:39 -0700
Subject: Add a separate non-specific target

This should fix #27.  We depend on some files in the etc/coq-scripts
submodule.

Note that you need to either run `make cleanall -k` or `rm -f Makefile.coq`
after pulling this to build the development.
---
 .gitignore         |  1 +
 Makefile           | 43 +++++++++++++++++++++++++++----------------
 Makefile.submodule | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+), 16 deletions(-)
 create mode 100644 Makefile.submodule

diff --git a/.gitignore b/.gitignore
index aeba9e55d..088f0262e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 *~
 .#*
 /.dir-locals.el
+/submodule-update
 Makefile.bak
 Makefile.coq
 Makefile.coq.bak
diff --git a/Makefile b/Makefile
index 6dfe0a04a..2cb9a1a63 100644
--- a/Makefile
+++ b/Makefile
@@ -1,17 +1,37 @@
 MOD_NAME := Crypto
 SRC_DIR  := src
+STDTIME?=/usr/bin/time -f "$* (real: %e, user: %U, sys: %S, mem: %M ko)"
 
 .PHONY: coq clean update-_CoqProject cleanall install \
-	install-coqprime clean-coqprime coqprime
+	install-coqprime clean-coqprime coqprime \
+	specific non-specific
 .DEFAULT_GOAL := coq
 
-SORT_COQPROJECT = sed 's,[^/]*/,~&,g' | env LC_COLLATE=C sort | sed 's,~,,g'
+-include Makefile.submodule
+
+STRICT_COQDEP ?= 1
+
+-include etc/coq-scripts/Makefile.coq.common
 
 update-_CoqProject::
-	$(Q)(echo '-R $(SRC_DIR) $(MOD_NAME)'; echo '-R Bedrock Bedrock'; (git ls-files 'src/*.v' 'Bedrock/*.v' | $(SORT_COQPROJECT))) > _CoqProject
+	$(SHOW)'ECHO > _CoqProject'
+	$(HIDE)(echo '-R $(SRC_DIR) $(MOD_NAME)'; echo '-R Bedrock Bedrock'; (git ls-files 'src/*.v' 'Bedrock/*.v' | $(SORT_COQPROJECT))) > _CoqProject
+
+clean::
+	rm -f submodule-update
+
+$(VOFILES): | coqprime
 
-coq: coqprime Makefile.coq
-	$(MAKE) -f Makefile.coq
+# add files to this list to prevent them from being built by default
+UNMADE_VOFILES :=
+
+COQ_VOFILES := $(filter-out $(UNMADE_VOFILES),$(VOFILES))
+SPECIFIC_VO := $(filter src/Specific/%,$(VOFILES))
+NON_SPECIFIC_VO := $(filter-out $(SPECIFIC_VO),$(VO_FILES))
+
+specific: $(SPECIFIC_VO) coqprime
+non-specific: $(NON_SPECIFIC_VO) coqprime
+coq: $(COQ_VOFILES) coqprime
 
 COQ_VERSION_PREFIX = The Coq Proof Assistant, version
 COQ_VERSION := $(firstword $(subst $(COQ_VERSION_PREFIX),,$(shell $(COQBIN)coqc --version 2>/dev/null)))
@@ -31,19 +51,10 @@ clean-coqprime:
 install-coqprime:
 	$(MAKE) -C $(COQPRIME_FOLDER) install
 
-Makefile.coq: Makefile _CoqProject
-	$(Q)$(COQBIN)coq_makefile -f _CoqProject -o Makefile.coq
-
-clean: Makefile.coq
-	$(MAKE) -f Makefile.coq clean
-	rm -f Makefile.coq
-
-cleanall: clean clean-coqprime
+cleanall:: clean clean-coqprime
 	rm -f .dir-locals.el
 
-install: coq Makefile.coq
-	$(MAKE) install-coqprime
-	$(MAKE) -f Makefile.coq install
+install: coq install-coqprime
 
 .dir-locals.el::
 	sed 's:@COQPRIME@:$(COQPRIME_FOLDER):g' .dir-locals.el.in > $@
diff --git a/Makefile.submodule b/Makefile.submodule
new file mode 100644
index 000000000..78f301210
--- /dev/null
+++ b/Makefile.submodule
@@ -0,0 +1,35 @@
+ifneq (,$(wildcard .git)) # if we're in a git repo
+
+# if the submodule changed, update it
+SUBMODULE_DIFF=$(shell git diff etc/coq-scripts 2>&1 | grep 'Subproject commit')
+SUBMODULE_DIRTY=$(shell git diff etc/coq-scripts 2>&1 | grep dirty)
+ifneq (,$(SUBMODULE_DIRTY))
+submodule-update::
+	@ echo "\033[0;31mThe submodule is dirty; some scripts may fail.\033[0m"
+	@ echo "\033[0;31mRun (cd etc/coq-scripts && git clean -xfd && git reset --hard)\033[0m"
+else
+ifneq (,$(SUBMODULE_DIFF))
+submodule-update::
+	git submodule sync && \
+	git submodule update --init && \
+	touch "$@"
+endif
+endif
+
+ifeq (,$(wildcard submodule-update))
+submodule-update::
+	git submodule sync && \
+	git submodule update --init && \
+	touch "$@"
+else
+submodule-update::
+endif
+
+etc/coq-scripts/Makefile.coq.common etc/coq-scripts/compatibility/Makefile.coq.compat_84_85 etc/coq-scripts/compatibility/Makefile.coq.compat_84_85-early: submodule-update
+	@ touch "$@"
+endif
+
+FAST_TARGETS += clean-doc etc/coq-scripts etc/coq-scripts/Makefile.coq.common etc/coq-scripts/compatibility/Makefile.coq.compat_84_85 etc/coq-scripts/compatibility/Makefile.coq.compat_84_85-early submodule-update
+SUPER_FAST_TARGETS += submodule-update
+
+Makefile.coq: etc/coq-scripts/Makefile.coq.common etc/coq-scripts/compatibility/Makefile.coq.compat_84_85 etc/coq-scripts/compatibility/Makefile.coq.compat_84_85-early
-- 
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