"Fernando Barsoba" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
Hi,
I'm trying to build a project with sha-1 and md5 implementations from
http://www.cr0.net:8040/code/crypto/sha1/ (in case it is important
information)
and I'm getting the following error:
**** Incremental build of configuration Debug for project Sha1 ****
make -k all
Building file: ../sha1.c
Invoking: GCC C Compiler
gcc -O0 -g3 -Wall -c -fmessage-length=0 -osha1.o ../sha1.c
Finished building: ../sha1.c
Building target: Sha1.exe
Invoking: GCC C Linker
gcc -oSha1.exe ./sha1.o
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../libcygwin.a(libcmain.o)(.text+0xab):
undefined reference to [EMAIL PROTECTED]'
collect2: ld returned 1 exit status
make: *** [Sha1.exe] Error 1
make: Target `all' not remade because of errors.
Build complete for project Sha1
Any idea why is that? It's the first time is happening as far as I
remember..
Windows compilers actually rename the function called 'main'. I'm not sure
what the reason is. The most obvious reason is that the code in the crt (c
runtime) is run before main, but the actual entry point of the application
(in the crt) is not named main. In Microsoft's crt it is named
'WinMainCRTStartup' (or 'wWinMainCRTStartup' for unicode applications).
Cygwin uses the same renaming for consistancy (besides, I think it uses
Microsoft's crt anyway.)
If you are compiling just the files you linked for the included stand alone
test applicaton (that is the only thing sha1.exe could be)read this:
The problem is that the code you referenced has no 'main' function. Look
closely at the code and you will see
you need to define 'TEST'.
Otherwise if you are trying to use it in a project of your own:
You need to just include the files in the other project such that they
are linked directly into the application. If you need
more assistance you should contact somebody exepirenced with c, and with
using Eclipse to compile c code. If they are at all
confused regarding this error message just tell them that it is exactly
equivelent to a message of
"undefined reference to `_main'".
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