RFR: 8257913: Add more known library locations to simplify Linux cross-compilation

[Aleksey Shipilev]

On Thu, 4 Mar 2021 19:34:16 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

>> make/autoconf/lib-freetype.m4 line 201:
>> 
>>> 199:         if test "x$FOUND_FREETYPE" != "xyes" ; then
>>> 200:           LIB_CHECK_POTENTIAL_FREETYPE([$FREETYPE_BASE_DIR/include],
>>> 201:               [$FREETYPE_BASE_DIR/lib/$OPENJDK_TARGET_CPU-linux-gnueabihf], [well-known location])
>> 
>> Do we really need to explicitly list all the gnu* variants here? Isn't the subdir simply the value of openjdk-target? At least it looks that way in the submit.yml.
>
> I think that value should be accessible from OPENJDK_TARGET_AUTOCONF_NAME.

Unfortunately, AUTOCONF_NAME is a quadruplet. For example, for ARM `OPENJDK_TARGET_AUTOCONF_NAME` is `arm-unknown-linux-gnueabihf`, but the subdirectory is `arm-linux-gnueabihf`. I don't see how can I get the original `--openjdk-target` provided by user here. Seems to me it is not passed to autoconf?

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PR: https://git.openjdk.java.net/jdk/pull/2833