intelpython3-2018.1-023.x86_64: preprocessing error when compiling python module using regex.h

[rouberol]

Hi

I bump into an error when trying to build an additional python module using intelpython3-2018.1-023.x86_64

OS: CentOs 6.9 x86_64
Compiler: icc 18.0.1.163, gcc, presumed all
Intel python: 3-2018.1-023

# test:
cat <<EOF > regex_test.c
#include <regex.h>
EOF

$ icc -E -I /softs/intel/python/2018_u1/intelpython3/include regex_test.c >/dev/null
In file included from /softs/intel/python/2018_u1/intelpython3/include/tclPort.h(23),
                 from /softs/intel/python/2018_u1/intelpython3/include/tclInt.h(36),
                 from /softs/intel/python/2018_u1/intelpython3/include/regex.h(4),
                 from regex_test.c(1):
/softs/intel/python/2018_u1/intelpython3/include/tclUnixPort.h(158): error #2379: cannot open source file "../compat/unistd.h"
  #   include "../compat/unistd.h"
                                  ^
The "/softs/intel/python/2018_u1/intelpython3/include" include path is *required* for additional python modules compilation.
Obviously the *tcl header overrides the glibc one*.

No such problem occurs with a system python installation (CentOS 6.9), since glibc include "regex.h" is used.

Regards

sr

[Rohit_J_Intel]

Hi,

Thanks for bringing this issue to our attention, we would address this. In the meantime, you can employ the following workaround to build your Python extension:

• In file <IDP_installation>/include/tclUnixPort.h

   Replace : (from line 155)

   #ifdef HAVE_UNISTD_H
   #   include <unistd.h>
   #else
   #   include "../compat/unistd.h"
   #endif

   With:

   #ifdef HAVE_UNISTD_H
   #   include <unistd.h>
   #else
   #   include "compat/unistd.h"
   #endif

• In file <IDP_installation>/include/tclInt.h

   Replace: (from line 51)

  #ifdef STDC_HEADERS
  #include <stddef.h>
  #else
  typedef int ptrdiff_t;
  #endif

   With:

  #ifdef STDC_HEADERS
  #include <stddef.h>
  #else
  #ifndef _PTRDIFF_T
  #define _PTRDIFF_T
  typedef int ptrdiff_t;
  #endif
  #endif

With this workaround, you should be able to build regex_test.c with : icc -I<IDP_installation>/include regex_test.c

Thanks,
Rohit

[rouberol]

Hi Rohit the above workaround worked like a charm, thanks. Fix in next release? sr

[Rohit_J_Intel]

Yes, this would be fixed in the next release. Glad to be of help.

Thanks,

Rohit