Compiler development articles: what changed
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Title: Compiler development articles
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| 1 | + | > **Warning:** *As of 2021-May-21. the current compiler version is 3.2.2, so it is possible some of the details listed below may have changed.* | |
| 2 | + | ||
| 3 | + | The current FPC version under developement is 2.5.1. Compiler internals are documented at the evolving [[FPC internals]] page. | |
| 4 | + | ||
| 5 | + | ## General | |
| 6 | + | ||
| 7 | + | [[How to start]] | |
| 8 | + | ||
| 9 | + | [[FPC internals]] | |
| 10 | + | ||
| 11 | + | [[Language related articles]] | |
| 12 | + | ||
| 13 | + | [[Coding style]] | |
| 14 | + | ||
| 15 | + | [[Porting Free Pascal]] | |
| 16 | + | ||
| 17 | + | [[Testing FPC]] | |
| 18 | + | ||
| 19 | + | ### Enable new style smartlinking (FreeBSD, Linux) | |
| 20 | + | ||
| 21 | + | - in i_*.pas add tf_smartlink_sections to the flags field of the platform description record for your OS/CPU combo (in my case i_bsd.pas, the system_i386_freebsd_info record) | |
| 22 | + | - in ogelf.pas scroll down to nearly the bottom, and add af_smartlink_sections to the flags field of as_i386_elf32_info | |
| 23 | + | - run "(g)make all OPT='-Aas -k--gc-sections' at the toplevel to build using new smartlinking routines. | |
| 24 | + | ||
| 25 | + | ### C++ linking | |
| 26 | + | ||
| 27 | + | Note that FPC doesn't have negative VMT offsets due to GNU LD limitations. | |
| 28 | + | ||
| 29 | + | The fundament of above C++ \<-\> OPas lies in COM interfaces: (quote from Rudy Velthuis) | |
| 30 | + | ||
| 31 | + | "Well, all compilers must be able to create COM interfaces. Since in C++, these are simply pure abstract classes, and Delphi must have the same layout, for many reasons, they are all compatible. In fact, a pure abstract class pointer points to a structure of which the first entry is a VMT. This is also how interfaces are built" | |
| 32 | + | ||
| 33 | + | ## Processor dependent | |
| 34 | + | ||
| 35 | + | See also [[Platform list|platform list]]. | |
| 36 | + | ||
| 37 | + | [[Passing Pascal Types to C Routines]] | |
| 38 | + | ||
| 39 | + | ### i386 | |
| 40 | + | ||
| 41 | + | [[PIC information]] | |
| 42 | + | ||
| 43 | + | ### PowerPC | |
| 44 | + | ||
| 45 | + | [[PPC Calling conventions]] | |
| 46 | + | ||
| 47 | + | ### Internal Linker | |
| 48 | + | ||
| 49 | + | [[Internal Linker]] | |
| 50 | + | ||
| 51 | + | ## Packages | |
| 52 | + | ||
| 53 | + | [[packages|Packages]] | |
| 54 | + | ||
| 55 | + | --- | |
| 56 | + | *From the Free Pascal wiki, page "Compiler development articles", as it stood on 2021-06-10 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* | |
| 57 | + | Category: FPC | |
| 58 | + | Category: FPC development |