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Asked: 2026-05-31T11:28:07+00:00

I am trying to compile some C++ code which uses the CGAL library on

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I am trying to compile some C++ code which uses the CGAL library on OS X Lion. I downloaded and installed on some directory the CGAL library. Then, when I try to compile the code, using “make”;

triangulation.h:18:64: error: CGAL/Exact_predicates_inexact_constructions_kernel.h: No such file or directory

which means it does not find the CGAL lib. I look at the Makefile, and I see that it compiles using the flag

-lCGAL

Wondering how to solve this, I guess I could pass the information about the placement of my compiled library to this variable, but I do not how. I tried with export and so on but it does not recognize it, any hints?

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1 Answer

  1. Editorial Team

    The error message doesn’t mean the library isn’t found; it means a header file isn’t found. The -lCGAL switch does indeed refer to the library. You’re going to need a -IXXXXX switch added on to CFLAGS, where XXXXX is the path to the directory containing the CGAL directory which in turn contains Exact_predicates_inexact_constructions_kernel.h .

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