problems compiling on solaris 10

[Riccardo Mottola]

Hi,

I installed gcc 4.8.0 from OpenCSW on solaris 10 (including objc and 
objc runtime of course). When configuring make, I notice that the test 
for threads fails.

checking for custom shared objc library... NONE
checking for the flag to link libobjc... -lobjc
checking whether objc has thread support... no


I thus inspected the test and tried to compile config_thread.m manually.

gcc -o conftest -g -O2 -x objective-c -I.   -fgnu-runtime -DGNU_RUNTIME 
config_thread.m  -lobjc  -lpthread
The result is a seg-fault, exactly as in the config.log

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
__objc_responds_to (sel=0x0, object=0xff35c098 <_OBJC_Class_Object>)
    at 
/home/maciej/src/opencsw/pkg/gcc4/trunk/work/solaris10-sparc/build-isa-sparcv8plus/gcc-4.8.0/libobjc/sendmsg.c:397
397 
/home/maciej/src/opencsw/pkg/gcc4/trunk/work/solaris10-sparc/build-isa-sparcv8plus/gcc-4.8.0/libobjc/sendmsg.c: 
No such file or directory.
(gdb) bt
#0  __objc_responds_to (sel=0x0, object=0xff35c098 <_OBJC_Class_Object>)
    at 
/home/maciej/src/opencsw/pkg/gcc4/trunk/work/solaris10-sparc/build-isa-sparcv8plus/gcc-4.8.0/libobjc/sendmsg.c:397
#1  __objc_forward (object=0xff35c098 <_OBJC_Class_Object>,
    sel=0x20ef4 <_OBJC_SELECTOR_TABLE>, args=0xffbffd08)
    at 
/home/maciej/src/opencsw/pkg/gcc4/trunk/work/solaris10-sparc/build-isa-sparcv8plus/gcc-4.8.0/libobjc/sendmsg.c:904
#2  0xff346344 in __objc_word_forward (rcv=<optimized out>,
    op=0x20ef4 <_OBJC_SELECTOR_TABLE>)
    at 
/home/maciej/src/opencsw/pkg/gcc4/trunk/work/solaris10-sparc/build-isa-sparcv8plus/gcc-4.8.0/libobjc/sendmsg.c:843
#3  0x00010c34 in main () at config_thread.m:26
(gdb) q


it is very strange that it looks for a file not there (but it is of the 
gcc build system apparently). I'm confused. Perhaps it is the debugger 
acting up?

What I found out is that if compilation is done without the two runtime 
flags, that is:
gcc -o conftest -g -O2 -x objective-c -I.   config_thread.m  -lobjc 
-lpthread

I get no crash. Even
gcc -o conftest -g -O2 -x objective-c -I.   -fgnu-runtime 
config_thread.m  -lobjc  -lpthread
is enough.

That means, the problem is -DGNU_RUNTIME. In fact, compiling with this 
define, I get a lot of warnings, which I don't get otherwise.
config_thread.m:7:1: warning: incomplete implementation of class 
'NXConstantString' [enabled by default]
 @end
 ^
config_thread.m:7:1: warning: method definition for '-length' not found 
[enabled by default]
config_thread.m:7:1: warning: method definition for '-cString' not found 
[enabled by default]
config_thread.m: In function 'main':
config_thread.m:26:3: warning: 'Object' may not respond to '+new' 
[enabled by default]
   id o = [Object new];
   ^
config_thread.m:26:3: warning: (Messages without a matching method 
signature [enabled by default]
config_thread.m:26:3: warning: will be assumed to return 'id' and accept 
[enabled by default]
config_thread.m:26:3: warning: '...' as arguments.) [enabled by default]

I tried substituding new with alloc+init, but I get the waring that 
alloc is not specified.

Gcc's Object.h indeed is extremely minimal and doesn't specify either 
new nor alloc.

Riccardo