[Lazarus] *** GMX Spamverdacht *** Re: Cross-compiling -> MIPS

[Sven Barth]

On 23.10.2012 15:49, SkyDiablo wrote:
> okay, what i have to try:
>
> 1. use lazarus 1.1 with FPC 2.7.1 (i386-win32-win32/win64) SVN-Revision
> 39124
> 2. download current fpc-build trunk 2.7.x -> D:\pas\trunc\fpcbuild\
> 3. compile with lazarus:
> D:\pas\trunc\fpcbuild\fpcsrc\compiler\ppmipsel.lpi ->
> D:\pas\trunc\fpcbuild\fpcsrc\compiler\mipsel\pp.exe

The first step is wrong. Compiling trunk is only supported by the last 
release of FPC which currently is 2.6.0.

Also the last step is wrong. That is only for compiler developers.

The correct way is the following:

Open a command line and navigate to D:\pas\trunc\fpcbuild\fpcsrc.
Execute the following command (placeholders that you need to replace 
correctly are marked as %...% and commented on below):

make all OS_TARGET=linux CPU_TARGET=mips BINUTILSPREFIX=%PREFIX% 
CROSSBINDIR=%BINUTILSDIR%
make crossinstall OS_TARGET=linux CPU_TARGET=mips 
BINUTILSPREFIX=%PREFIX% CROSSBINDIR=%BINUTILSDIR% 
INSTALL_PREFIX=%INSTALLDIR%

PREFIX is the prefix of the GNU binutils you have either downloaded or 
build yourself. For MIPS it should be something like "mips-elf-" or 
"mips-linux-".
BINUTILSDIR is the directory where the binutils binaries are located. 
Most especially "as" and "ld" (both with the %PREFIX% given above).
INSTALLDIR is the directory where you want to install that FPC to. It 
should be a different directory from the "fpcsrc" directory. E.g.: 
D:\pas\trunc\fpcbuild\fpcsrc-install

Note: If your FPC 2.6.0 installation is not in "PATH" you need to add 
"FPC=path\to\your\fpc.exe" to your the commands containing "all".

Eventually you'll might also want to do a "make all install 
INSTALL_PREFIX=%INSTALLDIR%" before all that to install a win32 compiler 
and (to ease usage) the "fpc" binary.

You then need to add a fpc.cfg to %INSTALLDIR%\bin\i386-win32 (or to be 
more precise: the directory where the ppcrossmips binary is located). 
You can e.g. copy the one from your 2.6.0 installation and adjust the 
paths in it.

Then it should work to call either "INSTALLDIR\bin\i386-win32\fpc 
-Pmips" or "ppcrossmips" to compile for MIPS. You also need to either 
specify the values given for %PREFIX% and %BINUTILSDIR% either on the 
command line (using -XP%PREFIX% (e.g. "-XPmips-elf-") and 
-FD%BINUTILSDIR%) or in the fpc.cfg in the following way:

ifdef CROSSCOMPILING
ifdef CPUMIPS
-XP%PREFIX%
-FD%BINUTILSDIR%
endif
endif

If you use any Linux libraries (e.g. libc, sqlite, etc.) you need to 
have those available on your development system as well and pass the 
correct paths to the compiler (I don't remember the correct parameters 
though as I'm rather seldomly doing a cross compile... :( )

Regards,
Sven