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From: | Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Undefined reference to __alloca |
Date: | 13 May 2004 11:22:43 GMT |
Lines: | 44 |
Message-ID: | <2gh443F2hodpU2@uni-berlin.de> |
References: | <200405130450 DOT i4D4oGfA022126 AT delorie DOT com> |
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To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
davin-libsdl4893 AT mailblocks DOT com wrote: > I get the following linker error > when I run make game.exe: > cd d:/research/2004/djgpp-game/ > make game.exe > c:/djgpp/bin/gpp.exe game.o -o .exe -lstdcxx -lm That line shows several actual or potential problems: 1) you should not have to call gpp.exe by an absolute path. 2) since you're using gpp.exe, there's no need to -lstdcxx 3) the output file name ".exe" is certainly not what you want it to be. > game.o(.text+0x3b):game.cc: undefined reference to `__alloca' Please compile with debug info turned on ("-g" flag). That'll resolve the error message to a function and line number. And in case you're not doing that yet (and your Makefile shows no sign of it): turn on optimization. GCC at least historically had some problems when you compiled C++ code with no optimization at all. > Here is my Makefile: > BIN=c:/djgpp/bin > %.run: %.exe > /$*.exe I'll assume there's a <Tab> and a "." before the "/" in that line in your actual file? (Hint: leading "." will get eaten by mail systems). > game.exe: game.o > $(BIN)/gpp.exe $^ -o $*.exe (Again, something ate the <Tab>) And no rule at all how to produce game.o? Are you sure it's compiled from your 'game.cc'? By *this* version of GCC? -- Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de) Even if all the snow were burnt, ashes would remain.
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