[CMake] Java not found

[szukw000]

cmake-3.12.4 did find the correct version:

-- Found Java: /usr/lib64/java/bin/java (found version "11.0.1")

But the cmake Module FindJava.cmake fails with this warning:

-----------------------------------------------------------
warning: [options] bootstrap class path not set in conjunction with
-source 5
error: Source option 5 is no longer supported. Use 6 or later.
error: Target option 1.5 is no longer supported. Use 1.6 or later.
make[2]: *** [src/bin/jpip/CMakeFiles/OPJViewerJar.dir/build.make:70:
bin/opj_jpip_viewer.jar] Error 2
make[1]: *** [CMakeFiles/Makefile2:680:
src/bin/jpip/CMakeFiles/OPJViewerJar.dir/all] Error 2
make: *** [Makefile:152: all] Error 2
-----------------------------------------------------------

Reading FindJava.cmake I found that the highest JAVA version seems
to be 1.9.x . And too for cmake-3.13.0-rc3 .

winfried
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[Roger Leigh]

Post by szukw000
-- Found Java: /usr/lib64/java/bin/java (found version "11.0.1")
-----------------------------------------------------------
warning: [options] bootstrap class path not set in conjunction with
-source 5
error: Source option 5 is no longer supported. Use 6 or later.
error: Target option 1.5 is no longer supported. Use 1.6 or later.

Java /was/ found correctly. The problem is that Java 11 is not capable
of compiling Java 5 (or 6, or 7) sources. Java 11 can only compile Java
8+ sources.

You need to either

- use an older JDK
- update the source and target versions to a minimum of 1.8

Since all the JDK versions supporting 1.5 are long out of support, I'd
recommend the latter. You might need some small source adjustments to
fix up any obsolete feature removals or behaviour changes.


Regards,
Roger
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