From snazarkin at azul.com  Mon Jul  2 10:25:41 2018
From: snazarkin at azul.com (Sergey Nazarkin)
Date: Mon, 2 Jul 2018 10:25:41 +0000
Subject: RFR:  better support for cross compilation
In-Reply-To: <AEA1507A-4CEA-4245-946B-A151C768033F@azul.com>
References: <AEA1507A-4CEA-4245-946B-A151C768033F@azul.com>
Message-ID: <8D485CFB-3D72-457E-B226-1BB3AB2FAF00@azul.com>

So far I?ve got the only single response with the proposal to remove redundant PI_TOOLS variable. I?ve accepted it and new changeset would be 

diff -r 1b3d9720d724 Makefile
--- a/Makefile	Tue Jun 19 19:15:30 2018 +0300
+++ b/Makefile	Mon Jul 02 13:20:46 2018 +0300
@@ -40,14 +40,19 @@
 
 ###########################################################
 # check for required env vars
+
 ifeq ($(CROSS_TOOL),)
-  $(error "CROSS_TOOL is not defined. Please set CROSS_TOOL to point to the location of the raspberry pi GNU toolchain")
+  $(error "CROSS_TOOL is not defined. Please set CROSS_TOOL to point to the location of the cross compilation GNU toolchain")
 endif
 
 ifeq ($(JAVA_HOME),)
   $(error "JAVA_HOME is not defined. Please set JAVA_HOME to point to the location of the JDK8 installation")
 endif
 
+# Target device JDK build, required for cross compilation, should contain "include /jni.h" and "inlude/linux/jni_md.h"
+# Default value points to host JDK
+TARGET_JDK_PATH ?= $(JAVA_HOME)
+
 BUILD_DEVICEACCESS := true
 
 DIO_JAVA_API_DIRS := \
@@ -79,10 +84,10 @@
 BUILD_NUMBER ?= dev
 
 ifneq ($(BUILD_NUMBER),dev)
-  # only include 'b' when you have an actual build number 
+  # only include 'b' when you have an actual build number
   B := b
 endif
-  
+
 
 ifeq ($(TARGET_CPU_LEGACY_LIB),arm)
   OSGI_ARCH := arm
@@ -165,15 +170,15 @@
 
 #######################################################################################################
 # tool and flag setup for arm (rasp pi) build
-TARGET_TOOLCHAIN := $(CROSS_TOOL)
-TARGET_CC := $(TARGET_TOOLCHAIN)gcc
-TARGET_CXX := $(TARGET_TOOLCHAIN)g++
-TARGET_LD := $(TARGET_TOOLCHAIN)gcc
+TARGET_CC := $(CROSS_TOOL)gcc
+TARGET_CXX := $(CROSS_TOOL)g++
+TARGET_LD := $(CROSS_TOOL)gcc
+
 JAVAC := $(JAVA_HOME)/bin/javac
 JAR := $(JAVA_HOME)/bin/jar
 MKDIR := mkdir -p
 TARGET_C_FLAGS = $(USER_C_FLAGS) -fPIC -Wno-psabi -DJAVACALL_REPORT_LEVEL=0 -DENABLE_DEVICEACCESS -c -MMD -MF $(NATIVE_OUT_DIR)/$(@).d
-TARGET_INCLUDES = $(foreach d,$(DIO_INCLUDE_DIRS),-I$(d)) -I$(JAVA_TARGET_HOME)/include -I$(JAVA_TARGET_HOME)/include/linux
+TARGET_INCLUDES = $(foreach d,$(DIO_INCLUDE_DIRS),-I$(d)) -I$(TARGET_JDK_PATH)/include -I$(TARGET_JDK_PATH)/include/linux
 TARGET_CXX_FLAGS = $(USER_CXX_FLAGS) -fPIC -Wno-psabi -DJAVACALL_REPORT_LEVEL=4 -DENABLE_DEVICEACCESS -c
 TARGET_LD_FLAGS= $(USER_LD_FLAGS) -Xlinker -z -Xlinker defs -Xlinker -O1 \
           -shared \


From allen at aemyers.com  Thu Jul  5 21:07:32 2018
From: allen at aemyers.com (Allen Myers)
Date: Thu, 5 Jul 2018 14:07:32 -0700
Subject: Ubuntu 16.04 Build
Message-ID: <CAOAy7tvnupKxNESFdhUAaD4SsvtbJt3+0m1N4Revki_4MZiS7g@mail.gmail.com>

I'd like to try and get this library working for a Ubuntu server that is
connected to an Arduino Zero.

I'm having trouble finding documentation/examples on how to build the
library. Are there binaries available somewhere?

Is there any document/guide that might walk a first time user through the
process to use this library?

From snazarkin at azul.com  Fri Jul  6 10:25:58 2018
From: snazarkin at azul.com (Sergey Nazarkin)
Date: Fri, 6 Jul 2018 10:25:58 +0000
Subject: Ubuntu 16.04 Build
In-Reply-To: <CAOAy7tvnupKxNESFdhUAaD4SsvtbJt3+0m1N4Revki_4MZiS7g@mail.gmail.com>
References: <CAOAy7tvnupKxNESFdhUAaD4SsvtbJt3+0m1N4Revki_4MZiS7g@mail.gmail.com>
Message-ID: <1A2F0E61-D37E-46D3-A8D1-0B78A08199C3@azul.com>


Hi Allan,

you can start from official page http://openjdk.java.net/projects/dio/.  The build is rather simple: just set JAVA_HOME=<path to jdk> and launch make. 


Sergey Nazarkin




> On 6 Jul 2018, at 00:07, Allen Myers <allen at aemyers.com> wrote:
> 
> I'd like to try and get this library working for a Ubuntu server that is
> connected to an Arduino Zero.
> 
> I'm having trouble finding documentation/examples on how to build the
> library. Are there binaries available somewhere?
> 
> Is there any document/guide that might walk a first time user through the
> process to use this library?


From snazarkin at azul.com  Fri Jul 13 19:31:47 2018
From: snazarkin at azul.com (snazarkin at azul.com)
Date: Fri, 13 Jul 2018 19:31:47 +0000
Subject: hg: dio/dev: DIO-27: Better support of cross-compilation
Message-ID: <201807131931.w6DJVl7a000384@aojmv0008.oracle.com>

Changeset: e9febb974bec
Author:    snazarki
Date:      2018-07-13 22:30 +0300
URL:       http://hg.openjdk.java.net/dio/dev/rev/e9febb974bec

DIO-27: Better support of cross-compilation

! Makefile


From snazarkin at azul.com  Fri Jul 13 19:38:37 2018
From: snazarkin at azul.com (Sergey Nazarkin)
Date: Fri, 13 Jul 2018 19:38:37 +0000
Subject: RFR:  better support for cross compilation
In-Reply-To: <8D485CFB-3D72-457E-B226-1BB3AB2FAF00@azul.com>
References: <AEA1507A-4CEA-4245-946B-A151C768033F@azul.com>
 <8D485CFB-3D72-457E-B226-1BB3AB2FAF00@azul.com>
Message-ID: <6FBDB9F3-1DEA-4A28-8CCC-8A02FCFFCD86@azul.com>

Hi!

Since there was no objection, I?ve committed the last version of Makefile changes. 


WBR,
Sergey Nazarkin




> On 2 Jul 2018, at 13:25, Sergey Nazarkin <snazarkin at azul.com> wrote:
> 
> So far I?ve got the only single response with the proposal to remove redundant PI_TOOLS variable. I?ve accepted it and new changeset would be 
> 
> diff -r 1b3d9720d724 Makefile
> --- a/Makefile	Tue Jun 19 19:15:30 2018 +0300
> +++ b/Makefile	Mon Jul 02 13:20:46 2018 +0300
> @@ -40,14 +40,19 @@
> 
> ###########################################################
> # check for required env vars
> +
> ifeq ($(CROSS_TOOL),)
> -  $(error "CROSS_TOOL is not defined. Please set CROSS_TOOL to point to the location of the raspberry pi GNU toolchain")
> +  $(error "CROSS_TOOL is not defined. Please set CROSS_TOOL to point to the location of the cross compilation GNU toolchain")
> endif
> 
> ifeq ($(JAVA_HOME),)
>   $(error "JAVA_HOME is not defined. Please set JAVA_HOME to point to the location of the JDK8 installation")
> endif
> 
> +# Target device JDK build, required for cross compilation, should contain "include /jni.h" and "inlude/linux/jni_md.h"
> +# Default value points to host JDK
> +TARGET_JDK_PATH ?= $(JAVA_HOME)
> +
> BUILD_DEVICEACCESS := true
> 
> DIO_JAVA_API_DIRS := \
> @@ -79,10 +84,10 @@
> BUILD_NUMBER ?= dev
> 
> ifneq ($(BUILD_NUMBER),dev)
> -  # only include 'b' when you have an actual build number 
> +  # only include 'b' when you have an actual build number
>   B := b
> endif
> -  
> +
> 
> ifeq ($(TARGET_CPU_LEGACY_LIB),arm)
>   OSGI_ARCH := arm
> @@ -165,15 +170,15 @@
> 
> #######################################################################################################
> # tool and flag setup for arm (rasp pi) build
> -TARGET_TOOLCHAIN := $(CROSS_TOOL)
> -TARGET_CC := $(TARGET_TOOLCHAIN)gcc
> -TARGET_CXX := $(TARGET_TOOLCHAIN)g++
> -TARGET_LD := $(TARGET_TOOLCHAIN)gcc
> +TARGET_CC := $(CROSS_TOOL)gcc
> +TARGET_CXX := $(CROSS_TOOL)g++
> +TARGET_LD := $(CROSS_TOOL)gcc
> +
> JAVAC := $(JAVA_HOME)/bin/javac
> JAR := $(JAVA_HOME)/bin/jar
> MKDIR := mkdir -p
> TARGET_C_FLAGS = $(USER_C_FLAGS) -fPIC -Wno-psabi -DJAVACALL_REPORT_LEVEL=0 -DENABLE_DEVICEACCESS -c -MMD -MF $(NATIVE_OUT_DIR)/$(@).d
> -TARGET_INCLUDES = $(foreach d,$(DIO_INCLUDE_DIRS),-I$(d)) -I$(JAVA_TARGET_HOME)/include -I$(JAVA_TARGET_HOME)/include/linux
> +TARGET_INCLUDES = $(foreach d,$(DIO_INCLUDE_DIRS),-I$(d)) -I$(TARGET_JDK_PATH)/include -I$(TARGET_JDK_PATH)/include/linux
> TARGET_CXX_FLAGS = $(USER_CXX_FLAGS) -fPIC -Wno-psabi -DJAVACALL_REPORT_LEVEL=4 -DENABLE_DEVICEACCESS -c
> TARGET_LD_FLAGS= $(USER_LD_FLAGS) -Xlinker -z -Xlinker defs -Xlinker -O1 \
>           -shared \
> 


From allen at aemyers.com  Tue Jul 17 23:10:37 2018
From: allen at aemyers.com (Allen Myers)
Date: Tue, 17 Jul 2018 16:10:37 -0700
Subject: Ubuntu 16.04 Build
In-Reply-To: <1A2F0E61-D37E-46D3-A8D1-0B78A08199C3@azul.com>
References: <CAOAy7tvnupKxNESFdhUAaD4SsvtbJt3+0m1N4Revki_4MZiS7g@mail.gmail.com>
 <1A2F0E61-D37E-46D3-A8D1-0B78A08199C3@azul.com>
Message-ID: <CAOAy7tte6qQ8sVXvAhy+6uCuGQxdHcKUXAB8phxvdYa2Besmxw@mail.gmail.com>

 Thank you, Sergey. I still have a problem if I don't define a CROSS_TOOL
value.

If I comment out line 45:
http://hg.openjdk.java.net/dio/dev/file/e9febb974bec/Makefile#l45

Will the build still produce as expected?

Where does the libdio.so file need to exist? Classpath?

On Fri, Jul 6, 2018 at 3:25 AM, Sergey Nazarkin <snazarkin at azul.com> wrote:

>
> Hi Allan,
>
> you can start from official page http://openjdk.java.net/projects/dio/.
> The build is rather simple: just set JAVA_HOME=<path to jdk> and launch
> make.
>
>
> Sergey Nazarkin
>
>
>
>
> > On 6 Jul 2018, at 00:07, Allen Myers <allen at aemyers.com> wrote:
> >
> > I'd like to try and get this library working for a Ubuntu server that is
> > connected to an Arduino Zero.
> >
> > I'm having trouble finding documentation/examples on how to build the
> > library. Are there binaries available somewhere?
> >
> > Is there any document/guide that might walk a first time user through the
> > process to use this library?
>
>

From snazarkin at azul.com  Wed Jul 18 09:30:11 2018
From: snazarkin at azul.com (Sergey Nazarkin)
Date: Wed, 18 Jul 2018 09:30:11 +0000
Subject: Ubuntu 16.04 Build
In-Reply-To: <CAOAy7tte6qQ8sVXvAhy+6uCuGQxdHcKUXAB8phxvdYa2Besmxw@mail.gmail.com>
References: <CAOAy7tvnupKxNESFdhUAaD4SsvtbJt3+0m1N4Revki_4MZiS7g@mail.gmail.com>
 <1A2F0E61-D37E-46D3-A8D1-0B78A08199C3@azul.com>
 <CAOAy7tte6qQ8sVXvAhy+6uCuGQxdHcKUXAB8phxvdYa2Besmxw@mail.gmail.com>
Message-ID: <5CCA6458-CC90-49C8-90C4-302EE0AFDC23@azul.com>


> On 18 Jul 2018, at 02:10, Allen Myers <allen at aemyers.com> wrote:
> 
> Thank you, Sergey. I still have a problem if I don't define a CROSS_TOOL value.
> 
> If I comment out line 45: http://hg.openjdk.java.net/dio/dev/file/e9febb974bec/Makefile#l45
> 
> Will the build still produce as expected?

It depends on what are expecting to get. Without CROSS_TOOL the library is built with host GCC, so that x86 linux will produce library for the intel cpu. 

> 
> Where does the libdio.so file need to exist? Classpath?

The path to the native library should be provided with -Djava.library.path=<path>

> 
> On Fri, Jul 6, 2018 at 3:25 AM, Sergey Nazarkin <snazarkin at azul.com> wrote:
> 
> Hi Allan,
> 
> you can start from official page http://openjdk.java.net/projects/dio/.  The build is rather simple: just set JAVA_HOME=<path to jdk> and launch make. 
> 
> 
> Sergey Nazarkin
> 
> 
> 
> 
> > On 6 Jul 2018, at 00:07, Allen Myers <allen at aemyers.com> wrote:
> > 
> > I'd like to try and get this library working for a Ubuntu server that is
> > connected to an Arduino Zero.
> > 
> > I'm having trouble finding documentation/examples on how to build the
> > library. Are there binaries available somewhere?
> > 
> > Is there any document/guide that might walk a first time user through the
> > process to use this library?
> 
> 


From allen at aemyers.com  Wed Jul 18 15:05:47 2018
From: allen at aemyers.com (Allen Myers)
Date: Wed, 18 Jul 2018 08:05:47 -0700
Subject: Ubuntu 16.04 Build
In-Reply-To: <5CCA6458-CC90-49C8-90C4-302EE0AFDC23@azul.com>
References: <CAOAy7tvnupKxNESFdhUAaD4SsvtbJt3+0m1N4Revki_4MZiS7g@mail.gmail.com>
 <1A2F0E61-D37E-46D3-A8D1-0B78A08199C3@azul.com>
 <CAOAy7tte6qQ8sVXvAhy+6uCuGQxdHcKUXAB8phxvdYa2Besmxw@mail.gmail.com>
 <5CCA6458-CC90-49C8-90C4-302EE0AFDC23@azul.com>
Message-ID: <CAOAy7ttqtb+m83zcJVDAS+641MomqvvYCuo=9Z5RzUvs=UFghQ@mail.gmail.com>

 Sergey: Thank you again.

So as I look deeper into this library, I'm starting to realize maybe it is
not what I need. I'm running a Java application from an x86 Ubuntu computer
that connects to an Arduino Zero via the USB port.

Is it possible to use this library for that USB connection?


On Wed, Jul 18, 2018 at 2:30 AM, Sergey Nazarkin <snazarkin at azul.com> wrote:

>
> > On 18 Jul 2018, at 02:10, Allen Myers <allen at aemyers.com> wrote:
> >
> > Thank you, Sergey. I still have a problem if I don't define a CROSS_TOOL
> value.
> >
> > If I comment out line 45: http://hg.openjdk.java.net/
> dio/dev/file/e9febb974bec/Makefile#l45
> >
> > Will the build still produce as expected?
>
> It depends on what are expecting to get. Without CROSS_TOOL the library is
> built with host GCC, so that x86 linux will produce library for the intel
> cpu.
>
> >
> > Where does the libdio.so file need to exist? Classpath?
>
> The path to the native library should be provided with
> -Djava.library.path=<path>
>
> >
> > On Fri, Jul 6, 2018 at 3:25 AM, Sergey Nazarkin <snazarkin at azul.com>
> wrote:
> >
> > Hi Allan,
> >
> > you can start from official page http://openjdk.java.net/projects/dio/.
> The build is rather simple: just set JAVA_HOME=<path to jdk> and launch
> make.
> >
> >
> > Sergey Nazarkin
> >
> >
> >
> >
> > > On 6 Jul 2018, at 00:07, Allen Myers <allen at aemyers.com> wrote:
> > >
> > > I'd like to try and get this library working for a Ubuntu server that
> is
> > > connected to an Arduino Zero.
> > >
> > > I'm having trouble finding documentation/examples on how to build the
> > > library. Are there binaries available somewhere?
> > >
> > > Is there any document/guide that might walk a first time user through
> the
> > > process to use this library?
> >
> >
>
>

From snazarkin at azul.com  Wed Jul 18 15:51:05 2018
From: snazarkin at azul.com (Sergey Nazarkin)
Date: Wed, 18 Jul 2018 15:51:05 +0000
Subject: Ubuntu 16.04 Build
In-Reply-To: <CAOAy7ttqtb+m83zcJVDAS+641MomqvvYCuo=9Z5RzUvs=UFghQ@mail.gmail.com>
References: <CAOAy7tvnupKxNESFdhUAaD4SsvtbJt3+0m1N4Revki_4MZiS7g@mail.gmail.com>
 <1A2F0E61-D37E-46D3-A8D1-0B78A08199C3@azul.com>
 <CAOAy7tte6qQ8sVXvAhy+6uCuGQxdHcKUXAB8phxvdYa2Besmxw@mail.gmail.com>
 <5CCA6458-CC90-49C8-90C4-302EE0AFDC23@azul.com>
 <CAOAy7ttqtb+m83zcJVDAS+641MomqvvYCuo=9Z5RzUvs=UFghQ@mail.gmail.com>
Message-ID: <7FD5E014-23FA-49A8-80DF-0AFE44478988@azul.com>

Allen,

DIO dio doesn?t support USB since there are special libraries for this.


Sergey Nazarkin




> On 18 Jul 2018, at 18:05, Allen Myers <allen at aemyers.com> wrote:
> 
> Sergey: Thank you again.
> 
> So as I look deeper into this library, I'm starting to realize maybe it is not what I need. I'm running a Java application from an x86 Ubuntu computer that connects to an Arduino Zero via the USB port.
> 
> Is it possible to use this library for that USB connection?
> 
> 
> On Wed, Jul 18, 2018 at 2:30 AM, Sergey Nazarkin <snazarkin at azul.com> wrote:
> 
> > On 18 Jul 2018, at 02:10, Allen Myers <allen at aemyers.com> wrote:
> > 
> > Thank you, Sergey. I still have a problem if I don't define a CROSS_TOOL value.
> > 
> > If I comment out line 45: http://hg.openjdk.java.net/dio/dev/file/e9febb974bec/Makefile#l45
> > 
> > Will the build still produce as expected?
> 
> It depends on what are expecting to get. Without CROSS_TOOL the library is built with host GCC, so that x86 linux will produce library for the intel cpu. 
> 
> > 
> > Where does the libdio.so file need to exist? Classpath?
> 
> The path to the native library should be provided with -Djava.library.path=<path>
> 
> > 
> > On Fri, Jul 6, 2018 at 3:25 AM, Sergey Nazarkin <snazarkin at azul.com> wrote:
> > 
> > Hi Allan,
> > 
> > you can start from official page http://openjdk.java.net/projects/dio/.  The build is rather simple: just set JAVA_HOME=<path to jdk> and launch make. 
> > 
> > 
> > Sergey Nazarkin
> > 
> > 
> > 
> > 
> > > On 6 Jul 2018, at 00:07, Allen Myers <allen at aemyers.com> wrote:
> > > 
> > > I'd like to try and get this library working for a Ubuntu server that is
> > > connected to an Arduino Zero.
> > > 
> > > I'm having trouble finding documentation/examples on how to build the
> > > library. Are there binaries available somewhere?
> > > 
> > > Is there any document/guide that might walk a first time user through the
> > > process to use this library?
> > 
> > 
> 
>