Compiling qhull

[Fabio_G_]

Dear all,

I'm trying to compiler qhull http://www.qhull.org/. I edited the makefile

by specifying CC = icc and CXX = icpc, I've thought it was enough.

However the compilation fails. There are an additional options for CC/CXX

CC_OPTS1  = -O2 -fPIC -ansi -Isrc/libqhull $(CC_WARNINGS)
CXX_OPTS1 = -O2 -Dqh_QHpointer -Isrc/ -Isrc/libqhullcpp -Isrc/libqhull $(CXX_WARNINGS)

the warning switches are

CC_WARNINGS  = -Wall -Wcast-qual -Wextra -Wwrite-strings -Wshadow
CXX_WARNINGS = -Wall -Wcast-qual -Wextra -Wwrite-strings -Wno-sign-conversion -Wshadow -Wconversion

The (main) error occurs at line (106) of qhull-2012.1/src/libqhull/qhull_a.h, i.e. at

#if defined(__INTEL_COMPILER) && !defined(QHULL_OS_WIN)
template <typename T>
inline void qhullUnused(T &x) { (void)x; }
#  define QHULL_UNUSED(x) qhullUnused(x);
#else
#  define QHULL_UNUSED(x) (void)x;
#endif

I cannot figure what is the solution. Can anyone help me?

Thank you, very much.

Fabio

[Judith_W_Intel]

Can you please tell us what error you are seeing and attach the preprocessed source so we can see what the macro is being expanded to?

thanks,

Judy

[Fabio_G_]

Well, launching icc -EP qhull_a.h it gives a long output and the macro expand as

template <typename T>
inline void qhullUnused(T &x) { (void)x; }

It is a template function and nothing seems to be missing.

The output of full compilation is quite short

mkdir -p bin lib
icc -c -O2 -fPIC -ansi -Isrc/libqhull -Wall -Wcast-qual -Wextra -Wwrite-strings -Wshadow -o src/rbox/rbox.o src/rbox/rbox.c
icc -c -O2 -fPIC -ansi -Isrc/libqhull -Wall -Wcast-qual -Wextra -Wwrite-strings -Wshadow -o src/libqhullstatic/global.o src/libqhull/global.c
src/libqhull/qhull_a.h(106): warning #77: this declaration has no storage class or type specifier
  template <typename T>
  ^

src/libqhull/qhull_a.h(106): error: expected a ";"
  template <typename T>
           ^

src/libqhull/qhull_a.h(115): warning #12: parsing restarts here after previous syntax error
  void    qh_qhull(void);
                        ^

compilation aborted for src/libqhull/global.c (code 2)
make: *** [src/libqhullstatic/global.o] Errore 2

Thanks!

However, I am looking for a ND Delaunay triangulator, do someone know kinda-of working with ICC??

[Judith_W_Intel]

It looks like you are compiling a C++ file with icc not icpc.

Judy

[Judith_W_Intel]

Either that or there's a bug in the header file that causes it to only work for C++ (since templates are a C++ only feature).

[Fabio_G_]

@Judith: Thanks, it could be. I'll try to force C++ compilation on whole code.

Does someone know a working C routine for n-dimensional Delaunay triangulation?

[bernaske]

Hi

i have download qhull and compiled with Parallel Studio XE 2013 ( Compiler Version 14.0.2 )

no problems.

1) cmake CMakeLists.txt

2) build with

make CC=icpc CXX=icc

no problems , correct compile, build all,

testqset works normal, q_test works normal

i use as environment:

Linux openSUSE 13.2 Milestone 0 64 Bit (x86_64) Kernel 3.14.0-5, KDE 4.13, XServer 11.0 NVIDIA Driver 334.21

icc (ICC) 14.0.2 20140120
Copyright (C) 1985-2014 Intel Corporation.  All rights reserved.

icpc (ICC) 14.0.2 20140120
Copyright (C) 1985-2014 Intel Corporation.  All rights reserved.