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Re: problems compiling on solaris 10


From: Riccardo Mottola
Subject: Re: problems compiling on solaris 10
Date: Mon, 15 Apr 2013 19:43:31 +0200
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:20.0) Gecko/20100101 Firefox/20.0 SeaMonkey/2.17

Hi!

does really nobody have a hint on how to continue on this? The test is minimal and the stacktrace is pretty low-level.

Riccardo

Riccardo Mottola wrote:
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



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