-- Installing: /tmp/cirrus-ci-build/include/prima/mod/newuoa_mod.mod
-- Installing: /tmp/cirrus-ci-build/include/prima/prima.h
cmake --build . --target tests
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/tmp/cirrus-ci-build/c/examples/bobyqa/bobyqa_example.c: In function 'main':
/tmp/cirrus-ci-build/c/examples/bobyqa/bobyqa_example.c:66:9: error: unused variable 'success' [-Werror=unused-variable]
   66 |     int success = (fabs(result.x[0] - 4.5) > 2e-2 || fabs(result.x[1] - 4) > 2e-2);
      |         ^~~~~~~
cc1: all warnings being treated as errors
gmake[3]: *** [c/CMakeFiles/example_bobyqa_c_exe.dir/build.make:76: c/CMakeFiles/example_bobyqa_c_exe.dir/examples/bobyqa/bobyqa_example.c.o] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:559: c/CMakeFiles/example_bobyqa_c_exe.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:200: CMakeFiles/tests.dir/rule] Error 2
gmake: *** [Makefile:192: tests] Error 2

Exit status: 2