jsoncpp 0.10.5 fails to cross-compile

[rkeene]

jsoncpp 0.10.5 attempts to run (???) the output of the compiler as if they were executable for some reason.

+ cmake -DJSONCPP_LIB_BUILD_STATIC=OFF -DJSONCPP_LIB_BUILD_SHARED=ON -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_SYSROOT=/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086/.fakeroot -DC
MAKE_C_COMPILER=x86_64-coreadaptive-linux-gcc -DCMAKE_CXX_COMPILER=x86_64-coreadaptive-linux-g++ -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY -DCMAKE_FIND_ROOT_PATH_MODE
_INCLUDE=ONLY -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY -DCMAKE_CROSSCOMPILING=1 .
-- The C compiler identification is GNU 4.9.3
-- The CXX compiler identification is GNU 4.9.3
-- Check for working C compiler: /home/rkeene/devel/aurae/common/compiler/online/x86_64-coreadaptive-linux/bin/x86_64-coreadaptive-linux-gcc
-- Check for working C compiler: /home/rkeene/devel/aurae/common/compiler/online/x86_64-coreadaptive-linux/bin/x86_64-coreadaptive-linux-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /home/rkeene/devel/aurae/common/compiler/online/x86_64-coreadaptive-linux/bin/x86_64-coreadaptive-linux-g++
-- Check for working CXX compiler: /home/rkeene/devel/aurae/common/compiler/online/x86_64-coreadaptive-linux/bin/x86_64-coreadaptive-linux-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- JsonCpp Version: 0.10.5
-- Found PythonInterp: /home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086/.fakeroot/native-bin/python2 (found suitable version "2.7.9", minimum required is "2.6") 
-- Configuring done
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_FIND_ROOT_PATH_MODE_LIBRARY
    JSONCPP_LIB_BUILD_SHARED
    JSONCPP_LIB_BUILD_STATIC


-- Build files have been written to: /home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086
+ echo '# IGNORE: DESTDIR'
+ postconfigure
+ :
+ prebuild
+ :
+ build
+ grep DESTDIR Makefile
+ make
+ local local_make make_args
+ local retval
+ '[' '' = 1 ']'
+ '[' -z '' ']'
++ which make
+ local_make=/home/rkeene/devel/aurae/common/detected-tools/make
+ make_args=
+ /home/rkeene/devel/aurae/common/detected-tools/make
make[2]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
make[3]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
make[4]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
Scanning dependencies of target jsoncpp_lib_static
make[4]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
make[4]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
[ 16%] Building CXX object src/lib_json/CMakeFiles/jsoncpp_lib_static.dir/json_reader.cpp.o
[ 33%] Building CXX object src/lib_json/CMakeFiles/jsoncpp_lib_static.dir/json_value.cpp.o
[ 50%] Building CXX object src/lib_json/CMakeFiles/jsoncpp_lib_static.dir/json_writer.cpp.o
Linking CXX static library libjsoncpp.a
make[4]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
[ 50%] Built target jsoncpp_lib_static
make[4]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
Scanning dependencies of target jsontestrunner_exe
make[4]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
make[4]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
[ 66%] Building CXX object src/jsontestrunner/CMakeFiles/jsontestrunner_exe.dir/main.cpp.o
Linking CXX executable jsontestrunner_exe
make[4]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
[ 66%] Built target jsontestrunner_exe
make[4]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
Scanning dependencies of target jsoncpp_test
make[4]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
make[4]: Entering directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
[ 83%] Building CXX object src/test_lib_json/CMakeFiles/jsoncpp_test.dir/jsontest.cpp.o
[100%] Building CXX object src/test_lib_json/CMakeFiles/jsoncpp_test.dir/main.cpp.o
Linking CXX executable jsoncpp_test
/bin/sh: ./jsoncpp_test: No such file or directory
make[4]: *** [src/test_lib_json/jsoncpp_test] Error 127
make[4]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
make[3]: *** [src/test_lib_json/CMakeFiles/jsoncpp_test.dir/all] Error 2
make[3]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/rkeene/devel/aurae/node/root/packages/jsoncpp/workdir-5148757114384260447086'
+ retval=2
+ return 2
+ die 'build failed'

[cdunn2001]

No idea. Let us know if you figure this out.

[ya1gaurav]

CMake Warning:
Manually-specified variables were not used by the project:

CMAKE_FIND_ROOT_PATH_MODE_LIBRARY
JSONCPP_LIB_BUILD_SHARED
JSONCPP_LIB_BUILD_STATIC

Check this, Cmake build variable names has been changed in new release.

[cdunn2001]

Thanks, @ya1gaurav. Do we need to take any action?

[ya1gaurav]

@rkeene Could you paste output of

make VERBOSE=1

Also use BUILD_SHARED_LIBS instead of JSONCPP_LIB_BUILD_SHARED & BUILD_STATIC_LIBS instead of JSONCPP_LIB_BUILD_STATIC.
As per build logs. "libjsoncpp" builds success, Also jsontestrunner_exe builds success, But problem is in running test cases using - "jsoncpp_test".
Please provide output of above command to analyse more.

[rpavlik]

Well, fundamentally you can't assume that you can run built executables on the build machine when cross compiling (CMAKE_CROSSCOMPILING iirc)

[cdunn2001]

Oh! Hmmm. So we need a way to build without running the tests. But we definitely want to run the tests in TravisCI, and I like to run the tests while I'm developing. I'm open to anything. Can someone submit a PR to avoid this?

[ndeubert]

Did you guys ever establish a way to cross compile without running the tests? I am running into that now on 1.8.3. If not is there a suggested line to comment out to disable the tests? Thanks.

[ndeubert]

I'll answer my own question for anyone in the future that comes across this thread run cmake with this defined: -DJSONCPP_WITH_POST_BUILD_UNITTEST=0

[cdunn2001]

Yes. But the tests should pass anyway. Any idea what the problem is?

[ndeubert]

The test program is linked, and the tests do pass, but obviously the resulting binary from the cross compile can't be run as part of the build which is what my problem was.