Re: safer way to use gnulib

[John W. Eaton]

On 16-Mar-2010, Ben Abbott wrote:

| Better, but ...
| 
| $ g++-4.2 -save-temps -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 sigchld_handler(int)’:
| sighandlers.cc:233: error: expected unqualified-id before ‘(’ token
| bens-macbook:src bpabbott$  ‘octave_interrupt_handler 
octave_ignore_interrupts()’:
| sighandlers.cc:507: warning: use of old-style cast
| sighandlers.cc: In function ‘void install_signal_handlers()’:
| sighandlers.cc:647: warning: use of old-style cast
| bens-macbook:src bpabbott$ vi sighandlers.cc 

We have the same problem with sigaddset, which is used in the
BLOCK_SIGNAL macro.  So try undefining sigaddset just before any uses
of the BLOCK_SIGNAL macro.  Does that help?  I've posted a message
about this problem to the gnulib bug list.

jwe