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From:	"deckerben" <deckerben AT freenet DOT de>
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Subject:	Re: making dxe2gen with clio.rice.edu binaries -or- "undefined reference to 'operator'"?
Date:	Tue, 9 Apr 2002 14:20:32 +0200
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To:	djgpp AT delorie DOT com
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> Note that if you compile and link a C++ program in one line, then gcc
knows it
> should link in the standard C++ library, because it knows its C++ from the
> file extension:
>
>     gcc -g -Wall -o foo foo.cpp

But I tried that before I submitted the question and it wasn't working.
    Say I compile manually (not hard with little dxe2gen..)

D:\Project\dxe2\src>gcc -O2 -c -g -Wall *.c -I../include
D:\Project\dxe2\src>gcc -O2 -g -Wall dxe2api.o dxe2stat.o -I../include
dxe2gen.cpp -o dxe2gen.exe
d:/user/djgpp/tmp\ccpkhKFC.o: In function `write_dxe(FILE*, FILE*,
external_file
hdr&)':
dxe2gen.cpp:237: undefined reference to `operator new[](unsigned long)'
dxe2gen.cpp:242: undefined reference to `operator new[](unsigned long)'
dxe2gen.cpp:249: undefined reference to `operator new[](unsigned long)'
dxe2gen.cpp:254: undefined reference to `operator new[](unsigned long)'
dxe2gen.cpp:481: undefined reference to `operator delete[](void*)'
dxe2gen.cpp:485: undefined reference to `operator delete[](void*)'
dxe2gen.cpp:486: undefined reference to `operator delete[](void*)'
dxe2gen.cpp:487: undefined reference to `operator delete[](void*)'
d:/user/djgpp/tmp\ccpkhKFC.o: In function `make_implib()':
dxe2gen.cpp:521: undefined reference to `operator new[](unsigned long)'
dxe2gen.cpp:616: undefined reference to `operator delete[](void*)'
dxe2gen.cpp:539: undefined reference to `operator delete[](void*)'
d:/user/djgpp/tmp\ccpkhKFC.o: In function `show_symbols(char const*)':
dxe2gen.cpp:647: undefined reference to `operator new[](unsigned long)'
d:/user/djgpp/tmp\ccpkhKFC.o(.eh_frame+0x11):dxe2gen.cpp: undefined
reference to
 `__gxx_personality_v0'
collect2: ld returned 1 exit status


Note: it appears that gcc DID NOT 'link with the standard C++ library',
although the cpp file extension appeared in the second command line.

now I try it again with manual link option with library:
gcc -O2 -g -Wall dxe2api.o dxe2stat.o -I../include dxe2gen.cpp -o
dxe2gen.exe -lstdcxx

...and it works fine. it seems that GCC is not automaticly pulling up the
standard C++ lib here, even when a .cpp file is being specified.

???
Ben

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