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<p class="MsoNormal"><span lang="EN-US">Hi, I wanted to try to build a JVM on Linux x86_64 with JVMCI disabled (just to check how the JVM behaves in a test).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The configure help output shows a long list how to enable those features<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-cds<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'cds' (enable class data sharing (CDS))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-compiler1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'compiler1' (enable hotspot compiler C1)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-compiler2<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'compiler2' (enable hotspot compiler C2)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-dtrace<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'dtrace' (enable dtrace support)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-epsilongc<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'epsilongc' (include the epsilon (no-op) garbage collector)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-g1gc<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'g1gc' (include the G1 garbage collector)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-jfr<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'jfr' (enable JDK Flight Recorder (JFR))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-jni-check<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'jni-check' (enable -Xcheck:jni support)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-jvmci<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'jvmci' (enable JVM Compiler Interface (JVMCI))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> --enable-jvm-feature-jvmti<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> enable jvm feature 'jvmti' (enable Java Virtual Machine Tool Interface (JVM TI))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> ….<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For disabling it seems the syntax --enable-jvm-feature-jvmci=no seems to work .<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Looking into make/autoconf/jvm-features.m4 this seems to be true for all JVM features .<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Should we add this to the help output ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Would be useful to have some sentence like --enable-jvm-feature-<name>=no can be used to disable a JVM feature .<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Should we add this to the configure help ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks, Matthias<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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