Correct Compiler for ARM / Arch64 for the jdk8u forest? (-m64 not supported)

[dalibor topic]

If this is related to yesterday's similar query [0], then I assume 
you're using http://hg.openjdk.java.net/jdk8u/jdk8u/ for the build.

There is no dedicated ARM port in JDK 8u. You would need to build the 
Zero interpreter instead, if you are building from the forest above, or, 
as Andrew suggested, use a different forest from the AArch64 Port Project.

cheers,
dalibor topic

[0] http://mail.openjdk.java.net/pipermail/build-dev/2017-April/018974.html

On 20.04.2017 13:16, Martijn Verburg wrote:
> Hi all,
>
> We've been putting together a community build farm and have wrangled from
> ARM machines. We are building from jdk8u and have the following
> configuration:
>
> -----
>
> A new configuration has been successfully created in
> /home/jenkins/workspace/george_arm_test/openjdk/build/linux-aarch64-normal-server-release
> using configure arguments
> '--with-boot-jdk=/usr/lib/jvm/java-1.7.0-openjdk-arm64 --enable-ccache
> --with-jvm-variants=server
> --with-cacerts-file=/home/jenkins/workspace/george_arm_test/cacerts_area/security/cacerts
> --with-alsa=/home/jenkins/workspace/george_arm_test/alsa-lib-1.0.27.2
> --with-freetype=/home/jenkins/workspace/george_arm_test/openjdk/installedfreetype
> --with-x=/usr/include/X11 --with-debug-level=release'.
>
> Configuration summary:
> * Debug level:    release
> * JDK variant:    normal
> * JVM variants:   server
> * OpenJDK target: OS: linux, CPU architecture: aarch64, address length: 64
>
> Tools summary:
> * Boot JDK:       java version "1.7.0_95" OpenJDK Runtime Environment
> (IcedTea 2.6.4) (7u95-2.6.4-3) OpenJDK 64-Bit Server VM (build 24.95-b01,
> mixed mode)  (at /usr/lib/jvm/java-1.7.0-openjdk-arm64)
> * C Compiler:     gcc-5 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0
> version 5.4.0 (at /usr/bin/gcc-5)
> * C++ Compiler:   g++-5 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0
> version 5.4.0 (at /usr/bin/g++-5)
>
> Build performance summary:
> * Cores to use:   16
> * Memory limit:   128878 MB
> * ccache status:  installed and in use
>
> Configured the JDK
>
> ------
>
> We notice that the configure output states:
>
> checking if the C compiler supports "-m64"... no
> checking if the C++ compiler supports "-m64"... no
> checking if both compilers support "-m64"... no
> checking if the C compiler supports "-m64"... no
> checking if the C++ compiler supports "-m64"... no
> checking if both compilers support "-m64"... no
>
> -----
>
> The hotspot build then fails (predictably enough) at:
>
> CCACHE_COMPRESS=1  CCACHE_SLOPPINESS=time_macros /usr/local/bin/ccache
> /usr/bin/g++-5 -DLINUX -D_GNU_SOURCE -DAMD64 -DPRODUCT -I.
> -I/home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/share/vm/prims
> -I/home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/share/vm
> -I/home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/share/vm/precompiled
> -I/home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/cpu/x86/vm
> -I/home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/os_cpu/linux_x86/vm
> -I/home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/os/linux/vm
> -I/home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/os/posix/vm
> -I../generated -DHOTSPOT_RELEASE_VERSION="\"25.71-b00\""
> -DHOTSPOT_BUILD_TARGET="\"product\"" -DHOTSPOT_BUILD_USER="\"jenkins\""
> -DHOTSPOT_LIB_ARCH=\"aarch64\" -DHOTSPOT_VM_DISTRO="\"OpenJDK\""
>  -DTARGET_OS_FAMILY_linux -DTARGET_ARCH_x86 -DTARGET_ARCH_MODEL_x86_64
> -DTARGET_OS_ARCH_linux_x86 -DTARGET_OS_ARCH_MODEL_linux_x86_64
> -DTARGET_COMPILER_gcc -DCOMPILER2 -DCOMPILER1 -fPIC -fno-rtti
> -fno-exceptions -D_REENTRANT -fcheck-new -fvisibility=hidden -m64  -pipe
> -fno-strict-aliasing  -g -fno-omit-frame-pointer -O3  -DVM_LITTLE_ENDIAN
> -D_LP64=1 -Werror -Wpointer-arith -Wsign-compare -Wundef -Wunused-function
> -Wunused-value     -std=gnu++98 -c -MMD -MP -MF
> ../generated/dependencies/precompiled.hpp.gch.d -fpch-deps -x c++-header
> /home/jenkins/workspace/george_arm_test/openjdk/hotspot/src/share/vm/precompiled/precompiled.hpp
> -o precompiled.hpp.gch
> *g++-5: error: unrecognized command line option '-m64'*
>
> -----
>
> We're inexperienced at build on this architecture, I assuming that we
> either need a compiler that supports -m64 or that -m64 should not be passed
> through in this case?
>
> Cheers,
> Martijn
>

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