[Ovmsdev] Development on FreeBSD

[Craig Leres]

Initially I got a build environment up on a spare ubuntu system. But I 
wanted to work under FreeBSD so I wrote FreeBSD port for the tool chain:

     https://www.freshports.org/devel/xtensa-esp32-elf/

My ubuntu system says:

     sea 1 % xtensa-esp32-elf-gcc --version
     xtensa-esp32-elf-gcc (crosstool-NG crosstool-ng-1.22.0-80-g6c4433a) 
5.2.0

And FreeBSD says:

     ice 250 % xtensa-esp32-elf-gcc --version
     xtensa-esp32-elf-gcc (crosstool-NG 
crosstool-ng-1.22.0-80-g6c4433a5) 5.2.0

So I believe I have the same version. To make the tool chain available I 
used:

     mkdir ~/esp
     ln -s ../../../../../usr/local/xtensa-esp32-elf ~/esp

A bonus of having the toolchain under FreeBSD is that (with a little 
work) it should be possible to build esp32 arduino sketches (which BTW 
is where all of my previous esp8266 and esp32 experience is).

In the process of getting this up I ran into a few rough edges.

First, on FreeBSD libintl.a is part of the gettext-runtime and installs 
with /usr/local as the PREFIX. Attached is the change I made to 
esp-idf/tools/kconfig/Makefile. It makes more sense to me to use -I and 
-L based on what files are found rather than keying off OS/OSNAME but I 
can't easily test this change on Windows. If this looks ok I can 
generate a pull request.

I had trouble getting a working copy esp-idf. The developer guide says 
to check out remotes/origin/release/v2.1 but that version was giving C 
errors. Eventually I diff'ed against the copy I had on ubuntu and found 
this to be a good set of instructions:

     git clone https://github.com/openvehicles/esp-idf.git
     cd esp-idf
     git submodule update --init

I assume the v2.1 step is obsolete. When I need to update it I use:

     git pull
     git submodule update

(If correct) I think this would worth adding to the developers guide. (I 
have to admit I'm pretty inexperienced with git; a majority of the work 
I do is with subversion.)

The developers guid says to:

     cp sdkconfig.default sdkconfig

This should be updated to

     cp support/sdkconfig.default.hw31 sdkconfig

And there are a lot of new options missing from 
support/sdkconfig.default.hw31. Maybe the guide should say, "using the 
defaults is usually safe." (Would it be possible to automatically 
generate a version of sdkconfig using the defaults and not asking any 
questions?)

I cloned Open-Vehicle-Monitoring-System-3 and to update it I've been using:

     git fetch upstream
     git checkout master
     git merge upstream/master
     git push

My module is currently running:

     3.1.007-2-gc3e62cc-dirty/ota_0/main (build idf 
v3.1-dev-987-g55d915e9-dirty Jun 23 2018 12:04:27)

built on a FreeBSD 11.1-RELEASE system.

		Craig

P.S. Thanks to Steve for all the offline help.
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diff --git a/tools/kconfig/Makefile b/tools/kconfig/Makefile
index 2454e47a..2af54460 100644
--- a/tools/kconfig/Makefile
+++ b/tools/kconfig/Makefile
@@ -230,12 +230,20 @@ LOADLIBES_nconf	= $(shell \
 				|| pkg-config --libs menu panel ncurses 2>/dev/null \
 				|| echo "-lmenu -lpanel -lncurses"  )
 
-ifeq ("$(OS)","Windows_NT")
-# Windows toolchains don't seem to count libintl
-# as a system library
+# Sometimes libintl is in a separate library (Windows, FreeBSD)
+ifneq ($(wildcard /usr/local/lib/libintl.a),)
+LOADLIBES_mconf += -L/usr/local/lib -lintl
+LOADLIBES_nconf += -L/usr/local/lib -lintl
+
+ifneq ($(wildcard /usr/local/include/libintl.h),)
+CFLAGS += -I/usr/local/include
+endif
+else
+ifneq ($(wildcard /usr/lib/libintl.a),)
 LOADLIBES_mconf += -lintl
 LOADLIBES_nconf += -lintl
 endif
+endif
 
 qconf.o: .tmp_qtcheck