<AWT Dev> RFR: 8081447: System JPEG builds include in-tree jpeglib.h, resulting in build failure

[Andrew Hughes]

----- Original Message -----
> Bug: https://bugs.openjdk.java.net/browse/JDK-8081447
> Webrev: http://cr.openjdk.java.net/~andrew/8081447/webrev.01/
> 
> In testing a fix for [0], I found that system jpeg support seems
> to have bitrotted. Due to the movement of makefiles, it's hard
> to trace where this change occurred, but we have the conditional
> code:
> 
> ifeq ($(USE_EXTERNAL_LIBJPEG), true)
>   BUILD_LIBJAVAJPEG_HEADERS :=
> else
>   BUILD_LIBJAVAJPEG_HEADERS := $(addprefix -I, $(LIBJAVAJPEG_SRC))
> endif
> 
> but then BUILD_LIBJAVAJPEG_HEADERS is not used and
> instead $(addprefix -I, $(LIBJAVAJPEG_SRC)) is hardcoded in
> BUILD_LIBJAVAJPEG:
> 
>     CFLAGS := $(CFLAGS_JDKLIB) $(addprefix -I, $(LIBJAVAJPEG_SRC)) \
> 
> When building using the system libjpeg, this means that the jpeglib.h
> from the in-tree copy of libjpeg is used to build jpegdecoder.o. This
> leads to references to symbols that don't exist in the system version
> and a failure to link libjavajpeg.so
> 
> The simple fix for this is to use BUILD_LIBJAVAJPEG_HEADERS again,
> as in the listed webrev.
> 
> Ok to push to client?
> 
> Thanks,

Reference should have been:

[0] https://bugs.openjdk.java.net/browse/JDK-8081315
-- 
Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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