Cross compiling Openjdk 8 for ARM, can't locate compiler

[David Holmes]

On 13/04/2017 11:44 PM, Stuart Monteith wrote:
> Hello Bruno,
>    I've not tried cross-compiling Java, so I don't have anything that
> will help you. Your best chance for help is on the aarch32-port-dev
> mailing list.

Folks there may be able to help but really this is an issue with 
building Zero for ARM on JDK 8. Note than unlike JDK 9 there is no 
OpenJDK ARM port in JDK 8.

Cheers,
David

> BR,
>    Stuart
>
>
> On 29 March 2017 at 21:23, Bruno Kremel <bruno.kremel at gmail.com> wrote:
>> Hi All,
>>
>> As I was not able to compile OpenJDK 9 (there is disscussion in other
>> mailing list). I tried to compile OpenJDK 8 precisely changeset 152-b02.
>>
>> I configure this way:
>>
>> ./configure --with-jvm-interpreter=cpp \
>> --with-jvm-variants=zero --enable-openjdk-only \
>> --with-freetype-include=~/linux/buildroot-openjdk8/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/include/freetype2\
>> --with-freetype-lib=~/linux/buildroot-openjdk8/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib\
>> --with-freetype=~/linux/buildroot-openjdk8/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/\
>> --with-debug-level=release --openjdk-target=arm-buildroot-linux-gnueabi \
>> --with-sys-root=~/linux/buildroot-openjdk8/output/host/usr/arm-buildroot-linux-gnueabi/sysroot\
>> --with-tools-dir=~/linux/buildroot-openjdk8/output/host \
>> --disable-freetype-bundling --enable-unlimited-crypto --disable-headful\
>> OBJCOPY=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-objcopy
>> STRIP=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-strip
>> CPP_FLAGS=-lstdc++ CXX_FLAGS=-lstdc++
>> CPP=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-cpp\
>> CXX=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-g++\
>> CC=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc\
>> LD=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc\
>> BUILD_CPP=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-cpp\
>> BUILD_CXX=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-g++\
>> BUILD_CC=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc\
>> BUILD_LD=~/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc
>>
>> The configure script seems to have some bug that it can't locate the
>> compiler properly:
>>
>> ...
>> checking for cl... /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc
>> configure: Resolving BUILD_CC (as /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc) faile
>> d, using /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc directly.
>> checking for cl... /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-g++
>> configure: Resolving BUILD_CXX (as /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-g++) fail
>> ed, using /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-g++ directly.
>> checking for ld... /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc
>> configure: Resolving BUILD_LD (as /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc) faile
>> d, using /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc directly.
>> checking for /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc... no
>> checking for /home/bruno/linux/buildroot-openjdk8/output/host/usr/bin/arm-linux-gnueabi-gcc... no
>> configure: error: Could not find a C compiler. You might be able to fix this by running 'sudo apt-get install build-ess
>> ential'.
>> configure exiting with result code 1
>> ...
>>
>> Those files that it claims "no" do exist and they are indeed a GCC crosscompiler.
>> The same parameters work for OpenJDK 9 (it does find the compiler).
>>
>> How can I resolve this issue?
>>
>> Thanks
>> Bruno Kremel
>>