INSTALL - libzahl - big integer library
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       INSTALL (1625B)
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            1 Configure libzahl
            2 =================
            3 
            4 libzahl is configured by editing config.mk. You may choose
            5 to make a copy of config.mk, and reference the copy with
            6 CONFIG when running make. For example:
            7     cp config.mk my-config.mk
            8     # edit my-config.mk
            9     make CONFIG=my-config.mk
           10 
           11 Unless you are compiling for Linux you may have to add
           12     -D'FAST_RANDOM_PATHNAME="<path to a non-blocking random number generator>"'
           13 (/dev/urandom on Linux) and
           14     -D'SECURE_RANDOM_PATHNAME="<path to a blocking random number generator>"'
           15 (/dev/random on Linux) to CPPFLAGS.
           16 
           17 If you are using a C standard library where the higher bits have higher
           18 entropy in the lower bits in rand(3) (as historically was the case),
           19 remove -DGOOD_RAND from CPPFLAGS.
           20 
           21 If you don't care if your program crashes on failure, you can add
           22 -DZAHL_UNSAFE to CPPFLAGS. This will give you a marginal performance
           23 boost. You should also add, preferably,
           24     #define ZAHL_UNSAFE
           25 before including <zahl.h> in your program if you are doing this.
           26 
           27 If your CPU does not support indirect jumps (computed jumps) you should
           28 add -DZAHL_ISA_MISSING_INDIRECT_JUMP to CPPFLAGS, and preferably add
           29     #define ZAHL_ISA_MISSING_INDIRECT_JUMP
           30 before including <zahl.h> in your program.
           31 
           32 libzahl contains some (very little) assembly code. In the event
           33 that the used instructions are not supported on your machine, please
           34 report it, and in the meanwhile add -DZAHL_NO_ASM to CPPFLAGS. You
           35 may also have to do this if you are compiling with a compiler that
           36 does not support extended inline assembly. You may also have to add
           37     #define ZAHL_NO_ASM
           38 to your program before includeing <zahl.h>