Using the -g flag but gdb still sais: no debugging symbols found

Using the -g flag but gdb still sais: no debugging symbols found

[Gary]

Hi,

I'm using CYGWIN to compile a source code which I've
downloaded.
I want to debug this code, which consists of many
source files.
I have edited the makefile to the best of my
understanding to include the -g flag when the make
utility calls g++. According to the make output -g is
indeed called but still I can't debug. What am I doing
wrong?

I am enclosing the makefile and also the make output
when it was run. There were some warnings output as
well, I don't think they are important but I don't
know how to redirect them to a file, they are
outputted to the shell.

Your help is much appreciated,

thanks,

Gary

The makefile:

#
# Makefile for cygmin/mingw - unrar
#
# Note: you have to 'make clean' before you can build
#    the sfx module
#

# POSIX using Cygmin GCC 3.3.1
CXX = g++
CXXFLAGS =  -O2 -Wno-deprecated -g
DEFINES = -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-DLITTLE_ENDIAN

# Win32 using Cygmin GCC 3.3.1
#CXX = g++ -mno-cygwin
#CXXFLAGS = -g -O2 -Wno-deprecated
#DEFINES = -D_MSC_VER -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE

# Win32 using Mingw32 GCC 3.3.2
#CXX = g++
#CXXFLAGS = -O2 -Wno-deprecated
#DEFINES = -D_MSC_VER -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE

##########################

COMPILE=$(CXX) $(CXXFLAGS) $(DEFINES)
LINK=$(CXX)

UNRAR_OBJ=filestr.o recvol.o rs.o scantree.o

OBJECTS=rar.o strlist.o strfn.o pathfn.o int64.o
savepos.o global.o \
           file.o filefn.o filcreat.o archive.o
arcread.o unicode.o \
    system.o isnt.o crypt.o crc.o rawread.o encname.o
\
    resource.o match.o timefn.o rdwrfn.o consio.o
options.o \
    ulinks.o errhnd.o rarvm.o rijndael.o getbits.o
sha1.o \
    extinfo.o extract.o volume.o list.o find.o
unpack.o cmddata.o

.cpp.o:
    $(COMPILE) -D$(WHAT) -c -g $<

all:    unrar

clean:
    @rm -f *.o *.bak *~

unrar:    WHAT=UNRAR
unrar:    $(OBJECTS) $(UNRAR_OBJ)
    @rm -f makeunrar
    $(LINK) -Wl,-s -g -o unrar $(LDFLAGS) $(OBJECTS)
$(UNRAR_OBJ) $(LIBS)   

sfx:    WHAT=SFX_MODULE
sfx:    $(OBJECTS)
    @rm -f default.sfx
    $(LINK) -Wl,-s -g -o default.sfx $(LDFLAGS)
$(OBJECTS) -DSFX_MODULE


The make utility output:

g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
rar.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
strlist.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
strfn.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
pathfn.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
int64.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
savepos.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
global.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
file.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
filefn.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
filcreat.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
archive.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
arcread.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
unicode.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
system.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
isnt.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
crypt.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
crc.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
rawread.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
encname.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
resource.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
match.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
timefn.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
rdwrfn.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
consio.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
options.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
ulinks.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
errhnd.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
rarvm.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
rijndael.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
getbits.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
sha1.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
extinfo.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
extract.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
volume.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
list.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
find.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
unpack.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
cmddata.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
filestr.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
recvol.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
rs.cpp
g++ -O2 -Wno-deprecated -g  -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -DLITTLE_ENDIAN -DUNRAR -c -g
scantree.cpp
g++ -Wl,-s -g -o unrar  rar.o strlist.o strfn.o
pathfn.o int64.o savepos.o global.o file.o filefn.o
filcreat.o archive.o arcread.o unicode.o system.o
isnt.o crypt.o crc.o rawread.o encname.o resource.o
match.o timefn.o rdwrfn.o consio.o options.o ulinks.o
errhnd.o rarvm.o rijndael.o getbits.o sha1.o extinfo.o
extract.o volume.o list.o find.o unpack.o cmddata.o
filestr.o recvol.o rs.o scantree.o    



      ____________________________________________________________________________________
Never miss a thing.  Make Yahoo your home page. 
http://www.yahoo.com/r/hs

Re: Using the -g flag but gdb still sais: no debugging symbols found

[Brian Dessent]

Gary wrote:

> DEFINES = -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
> -DLITTLE_ENDIAN

Cygwin does recognise these defines so this is not necessary, although
it probably does not hurt.  64 bit LFS is the default on Cygwin, you
don't have to define anything.

> unrar:    $(OBJECTS) $(UNRAR_OBJ)
>     @rm -f makeunrar
>     $(LINK) -Wl,-s -g -o unrar $(LDFLAGS) $(OBJECTS)
> $(UNRAR_OBJ) $(LIBS)   

-Wl,-s tells gcc to pass -s to the linker, and -s means strip the
executable.  So all the debug information you just generated is
discarded.  Also, -g when linking doesn't do anything, so you should
remove that too.

Brian

Re: Using the -g flag but gdb still sais: no debugging symbols found

[Gary]

--- Brian Dessent <brian@dessent.net> wrote:

> 
> -Wl,-s tells gcc to pass -s to the linker, and -s
> means strip the
> executable.  So all the debug information you just
> generated is
> discarded.  Also, -g when linking doesn't do
> anything, so you should
> remove that too.
> 
> Brian
> 

Worked

Thanks



      ____________________________________________________________________________________
Never miss a thing.  Make Yahoo your home page. 
http://www.yahoo.com/r/hs