On 27Mar, 2008, at 9:27, Andreas Schneider wrote:
Robert Bielik wrote:
I'm compiling under Ubuntu and want to generate 64 bit code. Is
there a way to get cmake to generate
the correct settings in the Makefile ?
I tried adding -m64 (and -march=x86-64) but the __x86_64__ define
does not seem to be set. I.e. when using
This define is set by the compiler not by the build system.
To see what defines are set by gcc, you can use
gcc -dM -E - < /dev/null
Very useful... For the 64 bit case, I added -m64 to the options on my
32 Bit Ubuntu box (Gutsy): __x86_64 and __x86_64__ are both defined.
HTH
Michael
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