[fpc-pascal] Build scripts for Freepascal and Lazarus compilation from source

[Matthias K.]

On Tue, Oct 5, 2010 at 3:57 PM, Jonas Maebe <jonas.maebe at elis.ugent.be> wrote:
>
> On 05 Oct 2010, at 15:40, Matthias K. wrote:
>
>> there is one improvement to this.
>> The first pass for the new compiler doesn't need "make all" which
>> compiles all packages too. This results in
>> duplicate package compilation on changes and packages take most time.
>> The following lines are part of an old fpc 2.4 gentoo ebuild I use,
>> which compiles the rtl/compiler with system compiler and compiles
>> rtl/packages/utils with the new compiler afterwards. Those only rtl is
>> compiled 2 times:
>>
>> # first pass, compile the new compiler with system compiler (no cycle,
>> must be same target)
>> make rtl
>> make compiler
>>
>> # second pass, compile rtl/utils/packages with new compiler
>> make PP=${FPC_BUILD_DIR}/compiler/${PPCNAME} rtl_clean
>> make PP=${FPC_BUILD_DIR}/compiler/${PPCNAME} rtl packages_all utils
>
> That is wrong, unless your starting compiler is exactly the same version as
> the compiler that you are compiling. The compiler needs a full cycle to
> guarantee that it's fully up-to-date, as some things may only be
> activated/fixed during the second compile (in case new features are added or
> bugs are fixed using such new features).

thx for the information, simplifies things quite a bit..

> That said, the blog post indeed contains superfluous steps. As far as I can
> tell, this part can simply be removed:
>
> ***
> #make again, using new build, rather than using SYSTEM_FPC_COMPILER
> make all PP=${FPC_INSTALL_DIR}/lib/fpc/${FPCVER}/${PPCNAME}
>
> # move current install out of the way
> mv ${FPC_INSTALL_DIR} ${FPC_INSTALL_DIR}_backup
> # mv ${FPC_INSTALL_DIR}/lib/fpc/${FPCVER}
> ${FPC_INSTALL_DIR}/lib/fpc/${FPCVER}_backup
>
> #install using current compiler
> make install PP=${FPC_BUILD_DIR}/compiler/${PPCNAME}
> INSTALL_PREFIX=${FPC_INSTALL_DIR}
> ***
>
> "make all" starts with a "make cycle" exactly to make sure that you don't
> have to start everything again using the newly built compiler once you're
> done.
>
>
> Jonas
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>