Hey everyone,
Having tried and failed in every way to create a simple shader using GLSL, i downloaded the GLSL version of HelloGPGPU (a simple shading program) and ran that.
[joe@helloGPGPU_GLSL-1.0.2]$ ./helloGPGPU_GLSL_linux
cpu vendor: GenuineIntel
cpu name: Mobile Intel(R) Pentium(R) 4 CPU 3.06GHz
MMX cpu detected.
SSE cpu detected.
Testing OS support for SSE... yes.
Testing OS support for SSE unmasked exceptions... SIGFPE, yes.
Tests of OS support for SSE passed.
Mesa: Mesa DEBUG build Jul 29 2005 10:03:17
helloGPGPU_GLSL_linux: shader/slang/slang_assemble.c:808: _slang_assemble_operation: Assertion `!"var->initializer, oper_identifier"' failed.
Aborted
And this is exactly what I got in my own application. The failure point was at glCompileShader for my app… exact same line too, 808
(gdb) bt
#0 0xffffe410 in ?? ()
#1 0x44250ec0 in ?? ()
#2 0x00000006 in ?? ()
#3 0x00000e59 in ?? ()
#4 0x40816805 in raise () from /lib/tls/libc.so.6
#5 0x408181e9 in abort () from /lib/tls/libc.so.6
#6 0x4080ff01 in __assert_fail () from /lib/tls/libc.so.6
#7 0x405bacd6 in _slang_assemble_operation (file=0x442511a0, op=0x8609e30, reference=0,
flow=0x44251190, space=0x44251180, info=0x44251170, stk=0x4425116c)
at shader/slang/slang_assemble.c:808
#8 0x405c40bd in _slang_aggregate_variable (agg=0x442511f0, spec=0x860a67c, array_size=0x8609e30,
funcs=0x44251774, structs=0x44251780) at shader/slang/slang_storage.c:195
#9 0x405c21d9 in parse_init_declarator (C=0x442512e0, type=0x44251240, vars=0x44251768,
structs=0x44251780, funcs=0x44251774) at shader/slang/slang_compile.c:1986
#10 0x405c227c in parse_init_declarator_list (C=0x442512e0, vars=0x44251768, structs=0x44251780,
funcs=0x44251774) at shader/slang/slang_compile.c:2010
#11 0x405c261b in parse_declaration (C=0x442512e0, scope=0x44251768, structs=0x44251780,
funcs=0x44251774) at shader/slang/slang_compile.c:2136
#12 0x405c26e8 in parse_translation_unit (C=0x442512e0, unit=0x44251768)
at shader/slang/slang_compile.c:2167
#13 0x405c27dc in compile_binary (prod=0x4066e8e0 "\002\002\002\001\005\001gl_MaxLights",
unit=0x44251768, type=slang_unit_fragment_builtin, log=0x442517f0, builtins=0x0)
at shader/slang/slang_compile.c:2211
#14 0x405c2a4e in _slang_compile (
source=0x85a2398 "void main(){ gl_FragColor = vec4(0.4,0.4,0.8,1.0);}", unit=0x44251800,
type=slang_unit_fragment_shader, log=0x442517f0) at shader/slang/slang_compile.c:2311
#15 0x40549932 in _shader_Compile (intf=0x84e0298) at shader/shaderobjects_3dlabs.c:630
#16 0x40547249 in _mesa_CompileShaderARB (shaderObj=1) at shader/shaderobjects.c:229
#17 0x4002584a in GPUShaderPack::InitMeanShader (this=0x84e0200)
at /home/joe/Sensor3D/src/GPU/GPUShaderPack.cpp:83
My code looks something like this:
meanFSText = Helper::ReadFile("mean.frag");
GLint blahlen = strlen(meanFSText);
// glShaderSourceARB(meanFS, 1, (const GLcharARB**)&meanFSText, (const GLint*)strlen(meanFSText));
glShaderSourceARB(meanFS, 1, (const GLcharARB**)&meanFSText, &blahlen);
PrintInfoLog(meanFS);
cout << "compiling" << endl;
glCompileShaderARB(meanFS);
cout << "compiling" << endl;
meanProg = glCreateProgramObjectARB();
cout << "compiling" << endl;
glAttachObjectARB(meanProg, meanFS);
It kinda freezes for 30 secs after coutting the first “compiling” and then dumps an error msg much like the hellow GPGPU one.
On closer inspection, it gives the stack shown above.
The situation is that I’m developing on my laptop, ATI 9000 IGP card.
I’ve recently got Mesa 6.3 working and I’m trying to lay some ground work for some multipass shading.
I had been using freeglut, however, when tyring to compile hello GPGPU, it keeps giving me this
/usr/local/include/GL/glut.h:531: error: `GLAPIENTRY' does not name a type
/usr/local/include/GL/glut.h:539: error: `GLAPIENTRY' does not name a type
/usr/local/include/GL/glut.h:541: error: `GLAPIENTRY' does not name a type
...
so i had to revert back to normal glut (i cheated and only overwrote the header) and it compiled.
I’m at a loss because i don’t know enough to know where the problem is. 
hehe