[Mesa-users] [Mesa-dev] glClearColor is broken in a weird way if compiled with mangling enabled

[Brian Paul]

Looks like your code is not finding any mgl*() prototypes.  What 
#includes do you have?  I think you need to #include "GL/gl_mangle.h" 
and then "GL/gl.h", IIRC.

-Brian

On 08/24/2015 11:42 AM, Yuzhu Lu wrote:
> Sorry.
>
> Here it is:
>
> osboxes at osboxes:~/Documents/mesa-demos-8.2.0/src/osdemos$ gcc -o
> osdemo32 osdemo32.c -I/usr/local/include/
> -I/home/osboxes/Documents/mesa-demos-8.2.0/src/util/ -L/usr/local/lib/
> -lMangledOSMesa32
> osdemo32.c: In function ‘Init’:
> osdemo32.c:122:32: warning: cast to pointer from integer of different
> size [-Wint-to-pointer-cast]
> printf("GL_RENDERER = %s\n",(const char *) mglGetString(GL_RENDERER));
> ^
> osdemo32.c: In function ‘main’:
> osdemo32.c:449:1: warning: format ‘%s’ expects argument of type ‘char
> *’, but argument 2 has type ‘int’ [-Wformat=]
> printf("Vendor: %s\n", mglGetString(GL_VENDOR));
> ^
> osdemo32.c:450:1: warning: format ‘%s’ expects argument of type ‘char
> *’, but argument 2 has type ‘int’ [-Wformat=]
> printf("Renderer: %s\n", mglGetString(GL_RENDERER));
> ^
> osdemo32.c:451:1: warning: format ‘%s’ expects argument of type ‘char
> *’, but argument 2 has type ‘int’ [-Wformat=]
> printf("Version: %s\n", mglGetString(GL_VERSION));
> ^
> osdemo32.c:452:46: warning: cast to pointer from integer of different
> size [-Wint-to-pointer-cast]
> printf("GL_PROGRAM_ERROR_STRING_ARB: = %s\n",(const char
> *)mglGetString(GL_PROGRAM_ERROR_STRING_ARB));
>
>
>
> Yuzhu
>
> ------------------------------------------------------------------------
> *From: *"Brian Paul" <brianp at vmware.com>
> *To: *"Yuzhu Lu" <yuzhu at wolfram.com>
> *Cc: *mesa-dev at lists.freedesktop.org, mesa-users at lists.freedesktop.org
> *Sent: *Monday, August 24, 2015 6:07:19 PM
> *Subject: *Re: [Mesa-users] [Mesa-dev] glClearColor is broken in a weird
> way if compiled with mangling enabled
>
> On 08/24/2015 10:51 AM, Yuzhu Lu wrote:
>  > Hi Brian,
>  >
>  > It happens for all the configuration I tried. Here is one example:
>  >
>  > ./configure --disable-xvmc --disable-glx --disable-dri
>  > --with-dri-drivers="" --with-gallium-drivers="swrast"
>  > --enable-texture-float --enable-shared-glapi --disable-egl
>  > --enable-mangling --with-egl-platforms="" --enable-gallium-osmesa
>  > --enable-gallium-llvm=yes --disable-llvm-shared-libs
>  >
>  > I am not sure this is related. I am using 64bit Ubuntu.
>  >
>  > Here are the only warnings I get:
>  >
>  > nir/glsl_to_nir.cpp: In member function 'virtual void
>  > {anonymous}::nir_visitor::visit(ir_call*)':
>  > nir/glsl_to_nir.cpp:610:73: warning: 'op' may be used uninitialized in
>  > this function [-Wmaybe-uninitialized]
>  > nir_intrinsic_instr *instr = nir_intrinsic_instr_create(shader, op);
>  >
>  > nir/nir_lower_phis_to_scalar.c: In function 'is_phi_src_scalarizable':
>  > nir/nir_lower_phis_to_scalar.c:70:14: warning: 'or' of unmatched
>  > not-equal tests is always 1
>  > src_alu->op != nir_op_vec4;
>  > ^
>  > CXX nir/nir_lower_samplers.lo
>  > nir/nir_lower_samplers.cpp: In function 'void
>  > lower_sampler(nir_tex_instr*, gl_shader_program*, const gl_program*,
>  > void*)':
>  > nir/nir_lower_samplers.cpp:72:9: warning: unused variable 'has_indirect'
>  > [-Wunused-variable]
>  > bool has_indirect = false;
>
> I was asking about the compiler options/warnings when you compile your
> mgl application, not Mesa itself.
>
> -Brian
>
>
>