[Issue 758] New: Segmentation fault when compiling.

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=758

           Summary: Segmentation fault when compiling.
           Product: D
           Version: 0.178
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: link-failure
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: quartz13163 at distanthumans.info


Segmentation occurs when compiling with a large amount of source files passed
to dmd. When I compile a tiny derelict sample program bud creates the necessary
parameters to the call to dmd. As you problably know bud scans the import
depedencies creating a list of d files to compile. The list can get fairly
large, which makes dmd crash.

Here is an example:

 /home/wdevore/D2/dmd/bin/dmd -c -version=Posix -L-ldl -w -op
-I"/home/wdevore/D2/dmd/src/ext/" -I"/home/wdevore/D2/dmd/src/phobos/"
-I"/home/wdevore/D2/test/" -I"/home/wdevore/D2/dmd/src/ext/derelict/opengl/"
-I"/home/wdevore/D2/dmd/src/ext/derelict/util/"
-I"/home/wdevore/D2/dmd/src/ext/derelict/sdl/" test.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gl.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gltypes.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/glfuncs.d
/home/wdevore/D2/dmd/src/ext/derelict/util/loader.d
/home/wdevore/D2/dmd/src/ext/derelict/util/exception.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gl12.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gl13.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gl14.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gl15.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gl20.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/gl21.d
/home/wdevore/D2/dmd/src/ext/derelict/opengl/glx.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/sdl.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/active.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/types.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/audio.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/rwops.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/byteorder.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/cdrom.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/cpuinfo.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/endian.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/error.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/events.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/keyboard.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/keysym.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/mouse.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/video.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/mutex.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/joystick.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/syswm.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/sdlversion.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/loadso.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/thread.d
/home/wdevore/D2/dmd/src/ext/derelict/sdl/timer.d

The program actually does very little:

import derelict.opengl.gl;
import derelict.sdl.sdl;
import std.stdio;

void main()
{
    try {
        DerelictGL.load();
        writefln("Successfully loaded the OpenGL shared library.");
    } catch (Exception e) {
        writefln("Could not load the OpenGL shared library.");
    }

        // load the SDL shared library
        try {
                DerelictSDL.load();
                writefln("Successfully loaded the SDL shared library.");
        } catch (Exception e) {
                writefln("Could not load the SDL shared library.");
                writefln(e.msg);
                return -1;
        }
}

You might be wondering why I don't use libraries. Currently, the linker on
linux is having trouble resolving references within libraries. So my work
around was to link directly to the .o files. The problem is that when to many
parameters are passed to dmd, it crashes. I would actually like to get "ld" to
able to resolve references. I realize that the ABI was changed but I compiled
everything from scratch. Clay Smith's suggestion help some, by suggesting I
replace all

struct x;

with 

struct x {}

This fixed alot of unresovled references but I still get the following when
compiling the simple program against the derelict libraries (the output is from
bud is verbose mode, I get a bunch of ...ModuleInfo... things unresolved):

Compiling with ..........
-version=Posix -L-ldl -L-lDerelictUtil -L-lDerelictGL -L-lDerelictSDL -w -op
-I"/home/wdevore/D2/Derelict/DerelictGL/"
-I"/home/wdevore/D2/Derelict/DerelictUtil/"
-I"/home/wdevore/D2/Derelict/DerelictSDL/" -I"/home/wdevore/D2/dmd/src/phobos/"
-I"/home/wdevore/D2/test/" test.d

Running '/home/wdevore/D2/dmd/bin/dmd -c -version=Posix -L-ldl -L-lDerelictUtil
-L-lDerelictGL -L-lDerelictSDL -w -op -I"/home/wdevore/D2/Derelict/DerelictGL/"
-I"/home/wdevore/D2/Derelict/DerelictUtil/"
-I"/home/wdevore/D2/Derelict/DerelictSDL/" -I"/home/wdevore/D2/dmd/src/phobos/"
-I"/home/wdevore/D2/test/" test.d '
Successful
Setting LIB=/home/wdevore/D2/Derelict/lib:/home/wdevore/D2/dmd/lib
Linking with ..........
-ldl -lDerelictUtil -lDerelictGL -lDerelictSDL test.o -o test -lc -lphobos
-lpthread -lm -L/home/wdevore/D2/Derelict/lib -L/home/wdevore/D2/dmd/lib

Running '/usr/bin/gcc -ldl -lDerelictUtil -lDerelictGL -lDerelictSDL test.o -o
test -lc -lphobos -lpthread -lm -L/home/wdevore/D2/Derelict/lib
-L/home/wdevore/D2/dmd/lib'
test.o:(.data+0x8c): undefined reference to
`_D8derelict6opengl2gl12__ModuleInfoZ'
test.o:(.data+0x90): undefined reference to
`_D8derelict3sdl3sdl12__ModuleInfoZ'
test.o: In function `_Dmain':test.d:(.gnu.linkonce.t_Dmain+0xe): undefined
reference to `_D8derelict6opengl2gl10DerelictGL4loadFAaZv'
:test.d:(.gnu.linkonce.t_Dmain+0x4d): undefined reference to
`_D8derelict3sdl3sdl11DerelictSDLS8derelict4util6loader13GenericLoader'
:test.d:(.gnu.linkonce.t_Dmain+0x52): undefined reference to
`_D8derelict4util6loader13GenericLoader4loadMFAaZv'
collect2: ld returned 1 exit status
Failed. Return code: 0100

------------------------------
I am not sure if I should submit the linker issues seperately. I am not sure
what else to do.


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