From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21874 invoked by alias); 1 Dec 2007 14:28:34 -0000 Received: (qmail 21866 invoked by uid 22791); 1 Dec 2007 14:28:34 -0000 X-Spam-Check-By: sourceware.org Received: from adsl-70-234-122-254.dsl.tul2ok.sbcglobal.net (HELO baby.espersunited.com) (70.234.122.254) by sourceware.org (qpsmtpd/0.31) with ESMTP; Sat, 01 Dec 2007 14:28:30 +0000 Received: from camille.espersunited.com ([192.168.1.3]) by baby.espersunited.com with esmtp (Exim 4.68) (envelope-from ) id 1IyTKM-0005k8-IN; Sat, 01 Dec 2007 08:28:20 -0600 Subject: Re: Undefined References From: Michael Sullivan To: Tom Browder Cc: gcc-help@gcc.gnu.org In-Reply-To: <8bc817ee0712010622ibcb277fya1c7374a66e64cec@mail.gmail.com> References: <8bc817ee0711302043t7eefb94eub6423ca23a449175@mail.gmail.com> <1196508719.25393.8.camel@camille.espersunited.com> <8bc817ee0712010422g139eefcfxea13bdec38b79b42@mail.gmail.com> <1196512977.25400.20.camel@camille.espersunited.com> <8bc817ee0712010509y5be58b3bhee821c4888a31402@mail.gmail.com> <1196514982.25393.23.camel@camille.espersunited.com> <47516051.9DEF354C@dessent.net> <1196515626.25419.26.camel@camille.espersunited.com> <8bc817ee0712010622ibcb277fya1c7374a66e64cec@mail.gmail.com> Content-Type: text/plain Date: Sat, 01 Dec 2007 14:28:00 -0000 Message-Id: <1196519300.25393.27.camel@camille.espersunited.com> Mime-Version: 1.0 X-Mailer: Evolution 2.12.1 Content-Transfer-Encoding: 7bit X-SpamScore: 0.0 (/) X-SpamReport: baby.espersunited.com detected 0.0 spam points 5.0 points required to mark as spam Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-help-owner@gcc.gnu.org X-SW-Source: 2007-12/txt/msg00022.txt.bz2 On Sat, 2007-12-01 at 08:22 -0600, Tom Browder wrote: > On Dec 1, 2007 7:27 AM, Michael Sullivan wrote: > > My Makefile is now: > ... > > %.o : %.cpp > > $(CXX) $(CFLAGS) $< -c $@ $(INC) > > The '-c' is misplaced. The '$@' refers to the object file and the > '$<' refers to the source file. So: > > %.o : %.cpp > $(CXX) $(CFLAGS) -c $< -o $@ $(INC) > > -Tom michael@camille ourrpg $ rm *.o michael@camille ourrpg $ make g++ -W -Wall -pedantic -c battle.cpp -o battle.o -I/usr/include/SDL battle.cpp: In member function 'SDL_Surface* battle::drawString(int, int, char*)': battle.cpp:72: warning: missing initializer for member 'SDL_Color::unused' g++ -W -Wall -pedantic -c character.cpp -o character.o -I/usr/include/SDL g++ -o battle battle.o character.o `sdl-config --cflags --libs` -lSDL_image -lSDL_gfx -lSDL_ttf battle.o: In function `battle::battle()': battle.cpp:(.text+0x9e3): undefined reference to `Character::Character()' battle.cpp:(.text+0xb35): undefined reference to `Character::~Character()' battle.cpp:(.text+0xb83): undefined reference to `Character::~Character()' battle.cpp:(.text+0xbd1): undefined reference to `Character::~Character()' battle.cpp:(.text+0xc16): undefined reference to `Character::~Character()' battle.o: In function `battle::battle()': battle.cpp:(.text+0xf19): undefined reference to `Character::Character()' battle.cpp:(.text+0x106b): undefined reference to `Character::~Character()' battle.cpp:(.text+0x10b9): undefined reference to `Character::~Character()' battle.cpp:(.text+0x1107): undefined reference to `Character::~Character()' battle.cpp:(.text+0x114c): undefined reference to `Character::~Character()' character.o: In function `Character::Character(char*, long, long)': character.cpp:(.text+0xdb): undefined reference to `vtable for Character' character.o: In function `Character::Character(char*, long, long)': character.cpp:(.text+0x12d): undefined reference to `vtable for Character' collect2: ld returned 1 exit status make: *** [battle] Error 1 michael@camille ourrpg $ cat Makefile CXX=g++ CFLAGS=-W -Wall -pedantic LIBS=`sdl-config --cflags --libs` -lSDL_image -lSDL_gfx -lSDL_ttf INC = -I/usr/include/SDL all: battle battle: battle.o character.o $(CXX) -o $@ battle.o character.o $(LIBS) %.o : %.cpp $(CXX) $(CFLAGS) -c $< -o $@ $(INC)