Re: status of new 'c++defs' module?

[John W. Eaton]

An additional problem showed up on OS X systems:

  libtool: compile:  g++-4.2 -DHAVE_CONFIG_H -I. -I.. -I/sw/lib/flex/include 
-I/sw/include -O0 -g -m32 -I/sw/include/freetype2 -I/sw/include/qhull 
-I/usr/include -I../libgnu -I../libgnu -I../libcruft/misc -I../liboctave 
-I../liboctave -I. -I. -I/sw/lib/flex/include -I/sw/include -O0 -g -m32 
-I/sw/include/freetype2 -I/sw/include/qhull -I/usr/include -I/sw/include -O0 -g 
-m32 -D_THREAD_SAFE -D_REENTRANT -DHAVE_CONFIG_H -mieee-fp -I/sw/include 
-I/sw/include/freetype2 -I/sw/include -I/usr/X11/include -Wall -W -Wshadow 
-Wold-style-cast -Wformat -I/sw/include -O0 -g -m32 -D_THREAD_SAFE -D_REENTRANT 
-D_THREAD_SAFE -pthread -I/sw/include -O0 -g -m32 -D_THREAD_SAFE -D_REENTRANT 
-MT liboctinterp_la-sighandlers.lo -MD -MP -MF 
.deps/liboctinterp_la-sighandlers.Tpo -c sighandlers.cc  -fno-common -DPIC -o 
.libs/liboctinterp_la-sighandlers.o
  sighandlers.cc: In function ‘void my_friendly_exit(const char*, int, bool)’:
  sighandlers.cc:132: warning: use of old-style cast
  sighandlers.cc:158: warning: use of old-style cast
  sighandlers.cc: In function ‘void (* octave_set_signal_handler(int, void 
(*)(int), bool))(int)’:
  sighandlers.cc:198: error: expected unqualified-id before ‘(’ token
  sighandlers.cc:199: error: expected unqualified-id before ‘(’ token
  sighandlers.cc: In function ‘void sigchld_handler(int)’:
  sighandlers.cc:232: error: expected unqualified-id before ‘(’ token
  sighandlers.cc:232: error: expected unqualified-id before ‘(’ token
  sighandlers.cc:232: error: expected unqualified-id before ‘(’ token
  sighandlers.cc: In function ‘octave_interrupt_handler 
octave_ignore_interrupts()’:
  sighandlers.cc:506: warning: use of old-style cast
  sighandlers.cc: In function ‘void install_signal_handlers()’:
  sighandlers.cc:646: warning: use of old-style cast
  make[3]: *** [liboctinterp_la-sighandlers.lo] Error 1
  make[2]: *** [all] Error 2
  make[1]: *** [all-recursive] Error 1
  make: *** [all] Error 2

Lines 198 and 199 of Octave's sighandlers.cc file are

  gnulib::sigemptyset (&act.sa_mask);
  gnulib::sigemptyset (&oact.sa_mask);

and looking at the preprocessed source file, I see they are being
transformed to

  gnulib::(*(&act.sa_mask) = 0, 0);
  gnulib::(*(&oact.sa_mask) = 0, 0);

So apparently, sigemptyset is a macro on OS X systems.  Likewise for
sigaddset.

I'm not sure what the best fix is for this problem.

jwe