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<div>Hi Juan,</div>
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I recommend using a boot JDK that is the closest final released version to that you are building, in this case JDK 23 (JDK 24 will be released in March), otherwise you might hit odd transitive issues.
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<div>(At some point soon I will merge jdk/master with babylon/code-reflection which will bump up the Babylon JDK version to 25, a boot JDK of 23 can still be used, and when 24 is released we can use that at the boot JDK. IIRC the configure script will tell
you if you are using a version that is too old.)</div>
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<div>Paul.</div>
<div><br>
<blockquote type="cite">
<div>On Jan 10, 2025, at 2:07 AM, Juan Fumero <juan.fumero@manchester.ac.uk> wrote:</div>
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Ok, nevermind.</div>
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Installing an older JDK 24 version works. For example this one:</div>
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```</div>
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sdk install java 24.0.2.r22-mandrel</div>
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```</div>
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Juan</div>
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<font face="Calibri, sans-serif" style="font-size: 11pt;"><b>From:</b><span class="Apple-converted-space"> </span>babylon-dev <babylon-dev-retn@openjdk.org> on behalf of Juan Fumero <juan.fumero@manchester.ac.uk><br>
<b>Sent:</b><span class="Apple-converted-space"> </span>10 January 2025 10:39<br>
<b>To:</b><span class="Apple-converted-space"> </span>babylon-dev@openjdk.org <babylon-dev@openjdk.org><br>
<b>Subject:</b><span class="Apple-converted-space"> </span>Fw: Error building Babylon in Fedora 41</font>
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Hi all,</div>
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I recently updated my system from Fedora 39 to 41, and I get the following error during the building of the code -reflection project.</div>
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```bash</div>
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Compiling up to 2 files for COMPILE_DEPEND</div>
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error: cannot access module-info</div>
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bad class file: /modules/java.se/module-info.class</div>
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bad requires flag: ACC_TRANSITIVE (0x0020</div>
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Please remove or make sure it appears in the correct subdirectory of the classpath.</div>
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1 error</div>
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gmake[3]: *** [CompileToolsJdk.gmk:87: /home/juan/repos/babylon/babylon/build/linux-x86_64-server-release/buildtools/depend/_the.COMPILE_DEPEND_batch] Error 1</div>
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gmake[3]: *** Waiting for unfinished jobs....</div>
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error: cannot access module-info</div>
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bad class file: /modules/java.se/module-info.class</div>
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bad requires flag: ACC_TRANSITIVE (0x0020</div>
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Please remove or make sure it appears in the correct subdirectory of the classpath.</div>
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1 error</div>
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gmake[3]: *** [CompileToolsJdk.gmk:48: /home/juan/repos/babylon/babylon/build/linux-x86_64-server-release/buildtools/jdk_tools_classes/_the.BUILD_TOOLS_JDK_batch] Error 1</div>
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gmake[2]: *** [make/Main.gmk:86: buildtools-jdk] Error 2</div>
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gmake[2]: *** Waiting for unfinished jobs....</div>
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Creating support/modules_libs/java.base/jrt-fs.jar</div>
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ERROR: Build failed for target 'images' in configuration 'linux-x86_64-server-release' (exit code 2) </div>
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Stopping javac server</div>
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```</div>
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My configuration summary seems to be correct:</div>
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```</div>
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Configuration summary:</div>
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* Name: linux-x86_64-server-release</div>
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* Debug level: release</div>
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* HS debug level: product</div>
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* JVM variants: server</div>
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* JVM features: server: 'cds compiler1 compiler2 epsilongc g1gc jfr jni-check jvmci jvmti management parallelgc serialgc services shenandoahgc vm-structs zgc' </div>
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* OpenJDK target: OS: linux, CPU architecture: x86, address length: 64</div>
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* Version string: 24-internal-adhoc.juan.babylon (24-internal)</div>
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* Source date: 1736501528 (2025-01-10T09:32:08Z)</div>
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Tools summary:</div>
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* Boot JDK: openjdk version "24-ea" 2025-03-18 OpenJDK Runtime Environment (build 24-ea+30-3590) OpenJDK 64-Bit Server VM (build 24-ea+30-3590, mixed mode, sharing) (at /home/juan/.sdkman/candidates/java/24.ea.30-open)</div>
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* Toolchain: gcc (GNU Compiler Collection)</div>
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* C Compiler: Version 12.3.0 (at /home/juan/bin/spack/opt/spack/linux-fedora41-skylake/gcc-14.2.1/gcc-12.3.0-apvzdiido5i7pxdda4vx5zfjcdtjbup2/bin/gcc)</div>
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* C++ Compiler: Version 12.3.0 (at /home/juan/bin/spack/opt/spack/linux-fedora41-skylake/gcc-14.2.1/gcc-12.3.0-apvzdiido5i7pxdda4vx5zfjcdtjbup2/bin/g++)</div>
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Build performance summary:</div>
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* Build jobs: 20</div>
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* Memory limit: 31807 MB</div>
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```</div>
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Any idea about how to fix this? </div>
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Kind regards,</div>
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Juan</div>
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