[LLVMbugs] [Bug 6668] New: Debug info: Source file paths should be absolute

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6668

           Summary: Debug info: Source file paths should be absolute
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: tss at iki.fi
                CC: llvmbugs at cs.uiuc.edu


(If there's a way to configure this, I didn't find it with a few google
searches, and the default should anyway be the same as with gcc.)

clang stores source code path using the same name as they were given to clang.
So typically as "./file.c". This makes debugging pretty difficult for projects
that have multiple source code directories, since gdb always just complains
about missing source code file. Also even for simple programs it won't work if
you try to debug it while working dir isn't the same as the source code dir.

Here's a simple example:

~% clang test2.c -o test -g
~% cd m
~/m% gdb ../test
(gdb) b main
Breakpoint 1 at 0x400509: file ./test2.c, line 4.
(gdb) r
Starting program: /home/tss/test 

Breakpoint 1, main () at ./test2.c:4
4       ./test2.c: No such file or directory.
        in ./test2.c

gcc does what I expected:

(gdb) r
Starting program: /home/tss/test 

Breakpoint 1, main () at test2.c:4
4               printf("foo\n");

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