[fpc-pascal] Does FPC require glibc?

Sven Barth pascaldragon at googlemail.com
Tue May 7 11:14:27 CEST 2019

Michael Van Canneyt <michael at freepascal.org> schrieb am Di., 7. Mai 2019,

> On Mon, 6 May 2019, Nozz via fpc-pascal wrote:
> > On Monday, May 6, 2019 10:48 PM, Sven Barth <pascaldragon at googlemail.com>
> wrote:
> >
> >> Nozz via fpc-pascal <fpc-pascal at lists.freepascal.org> schrieb am Mo.,
> 6. Mai 2019, 22:18:
> >>
> >>> Empty Message
> >>
> >> Depends on what you're using (and the platform). E.g. the compiler
> itself runs without glibc on Linux, but if you need to use threads for
> example that changes. Also if you link against libraries like GTK or Qt you
> also indirectly link to glibc and the RTL's initialization code will change
> due to this.
> >> On some targets (e.g. macOS) using the C library is a must.
> >>
> >> Regards,
> >> Sven
> >
> > Thanks, if I want to compile a program for Alpine Linux (musl libc
> instead of glibc) , is my best option to compile FPC&Lazarus from source?
> That should not be necessary.
> The programs that need the C library use the system installed C library.
> If this is libc instead of glibc, then that will be used, there is no
> explicit reference to gnu libc.

It depends whether the musl libc also leads to the inclusion of "libc.so.6"
in the ELF files. If yes, then all should be good (except if not all calls
are available, but then recompilation wouldn't help either), if not
everything needs to be rebuild so that the correct C library is entered in
the ELF.


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