From b5bfe8af171b795f6e9cd91f89ba68293e12a398 Mon Sep 17 00:00:00 2001
From: Alan Carvalho de Assis <acassis@gmail.com>
Date: Sun, 27 Nov 2016 11:19:46 -0600
Subject: [PATCH] The Smoothie project needs to compile C++ inside
 config/boardname/src/ to use with High Priority Interruption, then I modified
 the board configs Makefile to support it, see attached patch.

It works fine for the first time compilation, but if we execute:

$ touch config/boardname/src/Pin.cxx

And execute "make" it will not detect that Pin.cxx was modified. I think there is some other place I should modify, but I didn't find it.
---
 configs/Board.mk | 13 ++++++++++---
 configs/Makefile | 16 +++++++++++++---
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/configs/Board.mk b/configs/Board.mk
index 11f0ed4dc2..680b37ebcb 100644
--- a/configs/Board.mk
+++ b/configs/Board.mk
@@ -43,6 +43,7 @@ else
 AOBJS = $(ASRCS:$(ASMEXT)=$(OBJEXT))
 endif
 COBJS = $(CSRCS:.c=$(OBJEXT))
+CXXOBJS = $(CXXSRCS:.cxx=$(OBJEXT))
 
 SRCS = $(ASRCS) $(CSRCS)
 OBJS = $(AOBJS) $(COBJS)
@@ -108,17 +109,23 @@ $(AOBJS): %$(OBJEXT): %$(ASMEXT)
 $(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
 	$(call COMPILE, $<, $@)
 
-libboard$(LIBEXT): $(OBJS)
+$(CXXOBJS) $(LINKOBJS): %$(OBJEXT): %.cxx
+	$(call COMPILEXX, $<, $@)
+
+libboard$(LIBEXT): $(OBJS) $(CXXOBJS)
 	$(Q) $(AR) $@ # Create an empty archive
 ifneq ($(OBJS),)
-	$(call ARCHIVE, $@, $(OBJS))
+	$(call ARCHIVE, $@, $(OBJS) $(CXXOBJS))
 endif
 
-.depend: Makefile $(SRCS)
+.depend: Makefile $(SRCS) $(CXXSRCS)
 ifneq ($(ZDSVERSION),)
 	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
 else
 	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+endif
+ifneq ($(CXXSRCS),)
+	$(Q) $(MKDEP) "$(CXX)" -- $(CXXFLAGS) -- $(CXXSRCS) >>Make.dep
 endif
 	$(Q) touch $@
 
diff --git a/configs/Makefile b/configs/Makefile
index 68a5fad87f..f430e137e8 100644
--- a/configs/Makefile
+++ b/configs/Makefile
@@ -66,6 +66,7 @@ BOARD_INSTALLED = $(if $(wildcard $(BOARD_DIR)$(DELIM)Makefile),y,)
 
 CONFIG_ASRCS =
 CONFIG_CSRCS =
+CONFIG_CXXSRCS =
 
 # boardctl support
 
@@ -79,6 +80,9 @@ AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = $(CONFIG_CSRCS)
 COBJS = $(CSRCS:.c=$(OBJEXT))
 
+CXXSRCS = $(CONFIG_CXXSRCS)
+CXXOBJS = $(CXXSRCS:.cxx=$(OBJEXT))
+
 SRCS = $(ASRCS) $(CSRCS)
 OBJS = $(AOBJS) $(COBJS)
 
@@ -93,12 +97,18 @@ $(AOBJS): %$(OBJEXT): %.S
 $(COBJS): %$(OBJEXT): %.c
 	$(call COMPILE, $<, $@)
 
-$(BIN): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
+$(CXXOBJS): %$(OBJEXT): %.cxx
+	$(call COMPILEXX, $<, $@)
 
-.depend: Makefile $(SRCS)
+$(BIN): $(OBJS) $(CXXOBJS)
+	$(call ARCHIVE, $@, $(OBJS) $(CXXOBJS))
+
+.depend: Makefile $(SRCS) $(CXXSRCS)
 ifneq ($(SRCS),)
 	$(Q) $(MKDEP) --dep-path . "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
+endif
+ifneq ($(CXXSRCS),)
+	$(Q) $(MKDEP) --dep-path . "$(CXX)" -- $(CXXFLAGS) -- $(CXXSRCS) >>Make.dep
 endif
 	$(Q) touch $@