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authorJosé Fonseca <jfonseca@vmware.com>2013-05-17 13:23:04 +0100
committerJosé Fonseca <jfonseca@vmware.com>2013-05-21 12:34:19 +0100
commit8cabc7be1dd61bd4acf3669ae605361da64a1e8a (patch)
treeb97d2522fc31ba4059ff52737185ca146916741c /scons
parent2b7463cf3a50e136b6e99cfbb309f6c38152ac8c (diff)
scons: Don't force stabs debug format for Mingw.
- recent gdb handles DWARF fine (tested both with version 7.1.90.20100730 from mingw-w64 project, and 7.5-1 from mingw project) - http://people.freedesktop.org/~jrfonseca/bfdhelp/ was updated to handle DWARF - stabs requires ugly hacks to prevent compilation failures - mixing stabs/dwarf prevents proper backtraces (which is inevitable, given that the MinGW C runtime is pre-built with DWARF) For example, without this change I get: (gdb) bt #0 _wassert (_Message=0xf925060 L"Num < NumOperands && \"Invalid child # of SDNode!\"", _File=0xf60b488 L"llvm/include/llvm/CodeGen/SelectionDAGNodes.h", _Line=534) at ../../../../mingw-w64-crt/misc/wassert.c:51 #1 0x0368996b in _assert (_Message=0x39d7ee4 "Num < NumOperands && \"Invalid child # of SDNode!\"", _File=0x39d7e94 "llvm/include/llvm/CodeGen/SelectionDAGNodes.h", _Line=534) at ../../../../mingw-w64-crt/misc/wassert.c:44 #2 0x00000004 in ?? () #3 0x00000004 in ?? () #4 0x0f60b488 in ?? () #5 0x00000000 in ?? () While with this change I get: (gdb) bt #0 _wassert (_Message=0xfb982e8 L"Num < NumOperands && \"Invalid child # of SDNode!\"", _File=0xefbcb40 L"llvm/include/llvm/CodeGen/SelectionDAGNodes.h", _Line=534) at ../../../../mingw-w64-crt/misc/wassert.c:51 #1 0x039c996b in _assert (_Message=0x3d17f24 "Num < NumOperands && \"Invalid child # of SDNode!\"", _File=0x3d17ed4 "llvm/include/llvm/CodeGen/SelectionDAGNodes.h", _Line=534) at ../../../../mingw-w64-crt/misc/wassert.c:44 #2 0x033111cc in getOperand (Num=4, this=<optimized out>) at llvm/include/llvm/CodeGen/SelectionDAGNodes.h:534 #3 getOperand (i=4, this=<optimized out>) at llvm/include/llvm/CodeGen/SelectionDAGNodes.h:779 #4 llvm::SelectionDAG::getNode (this=0xf00cb08, Opcode=79, DL=..., VT=..., N1=..., N2=...) at llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:2859 #5 0x03377b20 in llvm::SelectionDAGBuilder::visitExtractElement (this=0xfb45028, I=...) at llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:2803 [...] Reviewed-by: Brian Paul <brianp@vmware.com>
Diffstat (limited to 'scons')
-rw-r--r--scons/crossmingw.py42
1 files changed, 0 insertions, 42 deletions
diff --git a/scons/crossmingw.py b/scons/crossmingw.py
index 23c56c0a2d..1287e0ec8c 100644
--- a/scons/crossmingw.py
+++ b/scons/crossmingw.py
@@ -130,40 +130,6 @@ SCons.Tool.SourceFileScanner.add_scanner('.rc', SCons.Defaults.CScan)
-def compile_without_gstabs(env, sources, c_file):
- '''This is a hack used to compile some source files without the
- -gstabs option.
-
- It seems that some versions of mingw32's gcc (4.4.2 at least) die
- when compiling large files with the -gstabs option. -gstabs is
- related to debug symbols and can be omitted from the effected
- files.
-
- This function compiles the given c_file without -gstabs, removes
- the c_file from the sources list, then appends the new .o file to
- sources. Then return the new sources list.
- '''
-
- # Modify CCFLAGS to not have -gstabs option:
- env2 = env.Clone()
- flags = str(env2['CCFLAGS'])
- flags = flags.replace("-gstabs", "")
- env2['CCFLAGS'] = SCons.Util.CLVar(flags)
-
- # Build the special-case files:
- obj_file = env2.SharedObject(c_file)
-
- # Replace ".cpp" or ".c" with ".o"
- o_file = c_file.replace(".cpp", ".o")
- o_file = o_file.replace(".c", ".o")
-
- # Replace the .c files with the specially-compiled .o file
- sources.remove(c_file)
- sources.append(o_file)
-
- return sources
-
-
def generate(env):
mingw_prefix = find(env)
@@ -221,13 +187,5 @@ def generate(env):
env['LIBPREFIXES'] = [ 'lib', '' ]
env['LIBSUFFIXES'] = [ '.a', '.lib' ]
- # MinGW x86 port of gdb does not handle well dwarf debug info which is the
- # default in recent gcc versions. The x64 port gdb from mingw-w64 seems to
- # handle it fine though, so stick with the default there.
- if env['machine'] != 'x86_64':
- env.AppendUnique(CCFLAGS = ['-gstabs'])
-
- env.AddMethod(compile_without_gstabs, 'compile_without_gstabs')
-
def exists(env):
return find(env)