RFR: JDK-8304867: Explicitly disable dtrace for ppc builds

[Aleksey Shipilev]

On Fri, 24 Mar 2023 11:40:01 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Currently the support for the JVM feature 'dtrace' is not implemented in the HS codebase on ppc, so we should disable it in the jvm-features make detection as well. Otherwise we could run into building with dtrace feature support if e.g. the 'dtrace' tool and related header(s) are available on the build machine.
> 
> Probably the same is true for the s390x platform, see
> https://github.com/openjdk/jdk/blob/0deb648985b018653ccdaf193dc13b3cf21c088a/src/hotspot/cpu/s390/c1_LIRAssembler_s390.cpp#L226
> but I only looked a bit more into ppc.

make/autoconf/jvm-features.m4 line 252:

> 250:     AC_MSG_CHECKING([for dtrace tool])
> 251:     if test "x$OPENJDK_TARGET_CPU_ARCH" = "xppc"; then
> 252:       AC_MSG_RESULT([no])

Look at how the block above replies the OS-CPU, to highlight that we don't have this support due to arch. Should do the same here.
https://github.com/openjdk/jdk/pull/13173/files#diff-a09b08bcd422d0a8fb32a95ccf85051ac1e69bef2bd420d579f74d8efa286d2fR236


AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])

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PR Review Comment: https://git.openjdk.org/jdk/pull/13173#discussion_r1147485427