There is a simple build failure after
[JDK-8280982](https://bugs.openjdk.org/browse/JDK-8280982) with older GCCs:
* For target support_native_java.desktop_libawt_xawt_screencast_pipewire.o:
In file included from
/home/buildbot/worker/build-jdkX-debian9/build/src/java.desktop/unix/native/libpipewire/include/spa/buffer/buffer.h:12:0,
from
/home/buildbot/worker/build-jdkX-debian9/build/src/java.desktop/unix/native/libpipewire/include/pipewire/stream.h:171,
from
/home/buildbot/worker/build-jdkX-debian9/build/src/java.desktop/unix/native/libawt_xawt/awt/screencast_pipewire.h:36,
from
/home/buildbot/worker/build-jdkX-debian9/build/src/java.desktop/unix/native/libawt_xawt/awt/screencast_pipewire.c:33:
/home/buildbot/worker/build-jdkX-debian9/build/src/java.desktop/unix/native/libpipewire/include/spa/utils/defs.h:61:24:
error: "__clang_major__" is not defined [-Werror=undef]
#elif __GNUC__ >= 7 || __clang_major__ >= 10
^~~~~~~~~~~~~~~
There is an obvious fix for this: we need to check for `defined(__GNUC__)`
explicitly before touching `__clang_major__`.
(Yes, GCC 6 is old; but we would like to make sure it builds until we run into
hard to resolve build issues. This allows modern JDKs to be built in legacy
enterprise environments for e.g. portable builds.)
Additional testing:
- [x] Linux GCC 6 fastdebug build (passes with HarfBuzz warnings, to be fixed
separately)
-------------
Commit messages:
- Fix
Changes: https://git.openjdk.org/jdk/pull/14995/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14995&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8312591
Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
Patch: https://git.openjdk.org/jdk/pull/14995.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/14995/head:pull/14995
PR: https://git.openjdk.org/jdk/pull/14995
