Ubuntu18.04 CMake Error: LIST GET given empty list

[wsakobe]

The following is the detail in cmake-gui (cmake version 3.10.2)
CMake Error at cmakemodules/script_detect_gcc.cmake:16 (LIST):
LIST GET given empty list
Call Stack (most recent call first):
CMakeLists.txt:83 (include)

CMake Error at cmakemodules/script_detect_gcc.cmake:17 (LIST):
LIST GET given empty list
Call Stack (most recent call first):
CMakeLists.txt:83 (include)

What's the problem?

[wsakobe]

BTW I'd like to run pl-slam and the guide said that:
If working with the most recent versions of the MRPT library you might find some issues due to hard refactoring, for which we recommend to use this version instead (the last one we tested):

https://github.com/MRPT/mrpt/tree/0c3d605c3cbf5f2ffb8137089e43ebdae5a55de3

[wsakobe]

I have fixed this problem by changing 'dumpversion' in this line into 'dumpfullversion'
But now when I did 'make -j8' i found another problem:
/home/xxx/Downloads/mrpt-0c3d605c3cbf5f2ffb8137089e43ebdae5a55de3/libs/base/include/mrpt/math/matrix_adaptors.h:507:20: error: expression cannot be used as a function
return howMany();
How can I fix this problem? i'm using gcc 7.4.0

[jlblancoc]

Hi,
This is actually a duplicated of rubengooj/pl-slam#30
Will address that one and post there...

[jlblancoc]

This has been finally solved via these two PRs (hopefully to be merged soon...):

1. Fix build against latest MRPT rubengooj/stvo-pl#15
2. CMake clean up; modern g2o and mrpt targets rubengooj/pl-slam#40

Cheers.

[wsakobe]

Thanks a lot bro! Let me have a look : )

[weiningwei]

Thanks a lot bro! Let me have a look : )

Hi, I also met the same problem. Have you solved it?

[johnjin404]

@weiningwei
Hi, have you fixed the problem of "make error "that shows
"mrpt/libs/base/include/mrpt/math/matrix_adaptors.h:507:20: error: expression cannot be used as a function return howMany( );"

[weiningwei]

@johnjin404
Hi, line 507 of file "mrpt/libs/base/include/mrpt/math/matrix_adaptors.h" is return howMany();.
I modified it to return howMany;

[jlblancoc]

It seems you are using an outdated version of mrpt, please try to upgrade to either the latest stable release or the develop branch.

[shaoxh]

@johnjin404 Hi, line 507 of file "mrpt/libs/base/include/mrpt/math/matrix_adaptors.h" is return howMany();. I modified it to return howMany;

This is great! Solved it!