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Update cross-compilation instructions.

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* README (Cross building Guile): Update.
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Ludovic Courtès 2011-11-23 22:19:40 +01:00
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@ -239,25 +239,28 @@ switches specific to Guile you may find useful in some circumstances.
Cross building Guile ===================================================== Cross building Guile =====================================================
As of guile-1.5.x, the build process uses compiled C files for As of Guile 2.0.x, the build process produces a library, libguile-2.0,
snarfing, and (indirectly, through libtool) for linking, and uses the along with Guile "object files" containing bytecode to be interpreted by
guile executable for generating documentation. Guile's virtual machine. The bytecode format depends on the endianness
and word size of the host CPU.
When cross building guile, you first need to configure, build and Thus, when cross building Guile, you first need to configure, build and
install guile for your build host. install it for your build host.
Then, you may configure guile for cross building, eg: Then, you may configure Guile for cross building:
./configure --host=i686-pc-cygwin --disable-shared ./configure --host=i686-pc-cygwin --disable-shared
A C compiler for the build system is required. The default is A C compiler for the build system is required. If that doesn't suit it
"PATH=/usr/bin:$PATH cc". If that doesn't suit it can be specified can be specified with the CC_FOR_BUILD variable in the usual way, for
with the CC_FOR_BUILD variable in the usual way, for instance instance:
./configure --host=m68k-unknown-linux-gnu CC_FOR_BUILD=/my/local/gcc ./configure --host=m68k-unknown-linux-gnu CC_FOR_BUILD=/my/local/gcc
Guile for the build system can be specified similarly with the Guile for the build system can be specified similarly with the
GUILE_FOR_BUILD variable, it defaults to just "guile". GUILE_FOR_BUILD variable, which defaults to whatever `guile' executable
is found in $PATH. It must have the exact same version has the Guile
that you intend to cross-build.
Using Guile Without Installing It ========================================= Using Guile Without Installing It =========================================