On Mon, 27 Mar 2023 05:23:26 GMT, David Holmes <dhol...@openjdk.org> wrote:
>> Please review this change for symbol visibility of static library artefacts.
>> This fixes an issue when
>> OpenJDK is being used as a base for generating native images preventing the
>> symbols from being
>> exported and looked up from the executable. Note that symbol visibity is now
>> controlled by a
>> linker version script downstream. This changes nothing for the regularly
>> shipped dynamic libraries.
>>
>> Thoughts?
>
> make/autoconf/flags-cflags.m4 line 639:
>
>> 637: STATIC_LIBS_CFLAGS="-DSTATIC_BUILD=1"
>> 638: if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" =
>> xclang; then
>> 639: STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS -ffunction-sections
>> -fdata-sections"
>
> Is it better/clearer to make the use of the default explicit as we do in the
> source:
>
> #define JNIEXPORT __attribute__((visibility("default")))
>
> ?
@dholmes-ora Do you mean something like this (instead of removing the `-D`
expression)?
STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS -ffunction-sections -fdata-sections \
-DJNIEXPORT='__attribute__((visibility("default")))'"
I can surely do that if that's preferred. No preference either way as far as
I'm concerned.
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PR Review Comment: https://git.openjdk.org/jdk/pull/13177#discussion_r1149000471
