CGAL users discussion list

[Juan José Casafranca <>]

I have posted this question in stack overflow (https://stackoverflow.com/
questions/59851535/undefined-reference-cgalprecondition-fail), but I 
reproduce 
it here as I think its the right place for CGAL questions:

I am trying to build a project with CMake in Debug mode. The project contains 
several static libraries, a dynamic library and an executable. The executable 
links against the dynamic library and the dynamic library links against 
several external dynamic libraries and to the project static libraries. One 
of 
the static libraries depends on CGAL.

```
Static A -> CGAL
Static B
Dynamic C -> Static A, Static B, Qt...
Executable -> Dynamic C
```

When compiling in Release mode, everything works fine, but when compiling in 
Debug mode, I get 

```
[100%] Linking CXX executable ../../bin/Executable
/usr/bin/ld: ../../lib/DynamicC.so: undefined reference to 
`CGAL::precondition_fail(char const*, char const*, int, char const*)'
collect2: error: ld returned 1 exit status
```

I have checked the exported symbols for DynamicC with `nm -D DynamicC | grep 
CGAL::precondition_fail` and it says its undefined

```
nm -C DynamicC.so | grep CGAL::precondition
                 U CGAL::precondition_fail(char const*, char const*, int, 
char 
const*)
```

I'm using a very recent CGAL header only version. 
I dont understand why it's complaining about undefined reference in Debug 
mode 
but not in Release, or how to fix it. Any ideas?