[Rd] r-base: FTBFS: Add "${boot_path}/zero" for OpenJDK zero build

[Simon Urbanek]

Dandan,

thanks! Dirk reported it as

https://bugs.r-project.org/show_bug.cgi?id=18884

and it should be fixed in R-devel r88154 - please confirm if it works for you and if it does, I'll port it to R 4.5.0 Patched.

Cheers,
Simon


> On Apr 17, 2025, at 3:40 PM, zhangdandan <zhangdandan using loongson.cn> wrote:
> 
> Source: r-base
> Version: 4.5.0-1
> Severity: normal
> Tags: FTBFS patch
> User: debian-loongarch using lists.debian.org
> Usertags: loong64
> 
> Hi maintainers,
> 
> Compiling the rjava 1.0-11-1 failed for loong64 in the Debian Package Auto-Building environment.
> The build error log(build error on 10 architectures)  is as follows,
> ```
> checking whether sigsetjmp is declared... yes
> checking whether siglongjmp is declared... yes
> checking Java support in R... present:
> interpreter : '/usr/lib/jvm/default-java/bin/java'
> archiver    : '/usr/lib/jvm/default-java/bin/jar'
> compiler    : '/usr/lib/jvm/default-java/bin/javac'
> header prep.: ''
> cpp flags   : ''
> java libs   : ''
> configure: error: One or more Java configuration variables are not set.
> ```
> The full log of rjava can be found at
> https://buildd.debian.org/status/package.php?p=rjava&suite=sid
> https://buildd.debian.org/status/fetch.php?pkg=rjava&arch=loong64&ver=1.0-11-2&stamp=1744704288&raw=0
> 
> After analysis, the reason is that libjvm.so is not found when compiling rjava(depend r-base).
> For loong64 or other architectures(build zero in openjdk-21), libjvm.so was supported in /usr/lib/jvm/default-java/lib/zero/ [1][2], not /usr/lib/jvm/default-java/lib/server/.
> So we need to add "${boot_path}/zero" for OpenJDK zero build in r-base source package.
> 
> Please consider the patch I attached for r-base.
> I have built r-base successfully in my local ENV.
> The result of my local test command `R CMD javareconf`, JNI linker flags can be found normally for OpenJDK zero build:
> ```
> # R CMD javareconf
> Java interpreter : /usr/lib/jvm/default-java/bin/java
> Java version     : 21.0.6
> Java home path   : /usr/lib/jvm/default-java
> Java compiler    : /usr/lib/jvm/default-java/bin/javac
> Java headers gen.:
> Java archive tool: /usr/lib/jvm/default-java/bin/jar
> 
> trying to compile and link a JNI program
> detected JNI cpp flags    : -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux
> detected JNI linker flags : -L$(JAVA_HOME)/lib/zero -ljvm
> ......
> JAVA_HOME        : /usr/lib/jvm/default-java
> Java library path: $(JAVA_HOME)/lib/zero
> JNI cpp flags    : -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux
> JNI linker flags : -L$(JAVA_HOME)/lib/zero -ljvm
> Updating Java configuration in /usr/lib/R
> Done.
> ```
> 
> Based on my local r-base (r-base-core_4.5.0-1+loong64.1_loong64.deb), rjava is built successfully.
> ```
> checking whether siglongjmp is declared... yes
> checking Java support in R... present:
> interpreter : '/usr/lib/jvm/default-java/bin/java'
> archiver    : '/usr/lib/jvm/default-java/bin/jar'
> compiler    : '/usr/lib/jvm/default-java/bin/javac'
> header prep.: ''
> cpp flags   : '-I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux'
> java libs   : '-L/usr/lib/jvm/default-java/lib/zero -ljvm'
> checking whether Java run-time works... yes
> ......
>    dh_builddeb -O--buildsystem=R
> dpkg-deb: building package 'r-cran-rjava' in '../r-cran-rjava_1.0-11-1_loong64.deb'.
> dpkg-deb: building package 'r-cran-rjava-dbgsym' in '../r-cran-rjava-dbgsym_1.0-11-1_loong64.deb'.
>  dpkg-genbuildinfo -O../rjava_1.0-11-1_loong64.buildinfo
>  dpkg-genchanges -O../rjava_1.0-11-1_loong64.changes
> ```
> 
> BTW, I do not find the link how to contribute patch(submit pull request) via GITHUB to R source code upstream(https://contributor.r-project.org/).
> So I submitted this patch to debian r-base source package first and Cc upstream's r-devel using r-project.org..
> Could you add the patch "Add "${boot_path}/zero" for OpenJDK zero build" in the next upload?
> Your opinions are welcome.
> 
> [1]: https://github.com/openjdk/jdk/pull/5440
> [2]: https://github.com/openjdk/jdk/pull/4787
> 
> Thanks,
> Dandan Zhang
> 
> <r-base-add-the-path-of-libjvm.so-for-zero-build.patch>______________________________________________
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