Hi!
Am 22.07.2010 23:49, schrieb waldo kitty:
in other words, from a w2k box, if i grab the sources for i386-win and
the sources for i386-linux and the sources for i386-OS2 and run the full
compilation process, will i truly end up with the compilers for linux
and OS2 such that cross compiling is now just a click or two away???
somehow, i don't think so... i may be wrong but no one has really been
able to show an easy method of doing this :?
Every i386-win32 compiler is also an i386-linux and an i386-os2 compiler
(and other i386 targets as well). But to compile an application for
another system than the current one (e.g. win32 -> linux) you have some
requirements:
1) You need the binutils for the target system (e.g. an ELF-linker for
Linux if you're compiling from Windows)
2) You need to build the RTL for the target
In FPC src dir you do it like this:
make all OS_TARGET=linux CPU_TARGET=i386
CROSSBINDIR=c:\your\dir\with\linux\binutils BINUTILSPREFIX=i386-linux-
The BINUTILSPREFIX is the part of the binary names of the binutils
before the e.g. "ld" or "as". It's (as well as CROSSBINDIR) needed for
the compiler to pick the correct binutils
You can then install the RTL into the same directory as your normal
win32 RTL:
make crossinstall OS_TARGET=linux CPU_TARGET=i386
INSTALL_PREFIX=c:\where\you\installed\i386-win32\
3) To compile a more complex program you also need the libraries that
are used on the target system like "ld-linux", "libc", "libmysqlclient",
"libgtk" etc.
Please note: if you cross compile from a i386 target excluding win32 to
win32 you need neither step 1 (because FPC contains an internal linker)
nor step 3 (because that's not needed on Windows platforms including
Win64 and WinCE).
To compile a cross compiler for a different platform (e.g. arm) you need
the following:
1) Binutils for your target platform
2) You need to compile with CPU_TARGET=arm and the appropiate system
(e.g. OS_TARGET=wince or OS_TARGET=linux) the rest is like 2) above
3) same as above
Regards,
Sven
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