[botan-devel] building 1.10.1 on windows 7 x64

tiredashell at gmail.com tiredashell at gmail.com
Sat Sep 24 01:49:30 EDT 2011

I'm trying to build 1.10.1 with the following config:

python configure.py --disable-shared --disable-debug --cc=msvc

After running nmake (MSVC++ 2010 Express) I eventually get this error:

build\include\botan/internal/mp_asm.h(18) : warning C4163: '_umul128'
: not available as an intrinsic function
build\include\botan/internal/mp_asm.h(30) : error C3861: '_umul128':
identifier not found
build\include\botan/internal/mp_asm.h(45) : error C3861: '_umul128':
identifier not found
NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual
Studio 10.0\VC\BIN\cl.EXE"' : return code '0x2'

If I add "--cpu=i386" it compiles fine, so the failure has something
to do with targetting x86_64.

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