Octave-2.1.31 on an alpha

[John W. Eaton]

On 18-Jul-2000, A Scottedward Hodel <address@hidden> wrote:

| I'm attempting to install Octave -2.1.31 on our alpha here.  I have been 
unable
| to compile since roughly version 2.1.28 (currently using 2.1.24).
| 
| The error message is below.   I've spent some time digging in the configure
| script and in liboctave/oct-time.cc to find the source of the problem.
| For some reason, the compilation of oct-time.cc does not define _OSF_SOURCE
| whereas the default configure script test case (using gcc or g++) does.
| 
| This is the test C program compiled by the configure script (with a
| hand modification to confirm that _OSF_SOURCE is defined):
| 
|       #line 6130 "configure"
|       #include "confdefs.h"
|       #include <sys/types.h>
|       #include <sys/time.h>
| 
|       #ifdef _OSF_SOURCE
|       #else
|       THIS SHOULD BE IGNORED
|       #endif
| 
|       int main() {
|       struct tm tm; tm.tm_zone;
|       ; return 0; }
| 
| The program compiles without error whether I use gcc conftest.c or
| g++ conftest.cc as compilation commands, so apparently _OSF_SOURCE is
| available by default.  However, when running a compile in Octave, I get
| c++ -c  -I. -I.. -I../liboctave -I../src -I../libcruft/misc 
| -I../glob -I../glob -DHAVE_CONFIG_H -mieee-with-inexact -fno-rtti 
| -fno-exceptions -fno-implicit-templates -g -O2 -Wall oct-time.cc -o 
| oct-time.o
| oct-time.cc: In method `octave_time::octave_time(const octave_base_tm &)':
| oct-time.cc:89: `struct tm' has no member named `tm_zone'
| oct-time.cc: In method `class string octave_base_tm::strftime(const 
| string &) const':
| oct-time.cc:185: `struct tm' has no member named `tm_zone'
| oct-time.cc: In method `void octave_base_tm::init(void *)':
| oct-time.cc:232: `struct tm' has no member named `tm_zone'
| oct-time.cc: In method `void octave_strptime::init(const string &, 
| const string &)':
| oct-time.cc:276: `struct tm' has no member named `tm_zone'
| 
| 
| The offending structure element is conditionally compiled in the time.h
| header file based on _OSF_SOURCE being defined.
| 
| I can compile oct-time.cc by typing "make CXXFLAGS="$CXXFLAGS -D_OSF_SOURCE".
| This looks like some change needs to be added to the alpha.*osf.*
|   part of the configure script.  I tried using CXXPICFLAGS but that didn't
| do the job.

I think the trouble is this code from oct-time.cc:

  // I am told that without _BSD_SOURCE, tm_zone won't be declared on
  // some systems.  Defining _XOPEN_SOURCE provides the declaration for
  // strptime on some others.
  //
  // These defines go here, before any system header files are included,
  // because the system header files may define other macros that are
  // actually used to determine the feature set.  If we wait until after
  // some system header file is included, it may be too late.

  #if !defined (_BSD_SOURCE)
  #define _BSD_SOURCE 1
  #define OCTAVE_UNDEFINE_BSD_SOURCE
  #endif

  #if !defined (_XOPEN_SOURCE)
  #define _XOPEN_SOURCE 1
  #define OCTAVE_UNDEFINE_XOPEN_SOURCE
  #endif

If you remove these definitions, then oct-time.cc should compile on
your system.  Unfortunately, these defines may be needed on some
systems.  I suppose we need a better way of testing this.  Any
volunteers?

BTW, please report problems with the development sources to the
octave-maintainers mailing list.

Thanks,

jwe



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