build 32bit .so with -fPIC
lazarus / 1-Linux

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abk.964 · 2024-12-28 09:22

Hi.
I try to build 32bit (i386) shared library with -fPIC option.
Create new project "Library", set target Linux i386, add -fPIC and -Cg
to custom options (think it's synonym), pass to linker option --warn-
shared-textrel.

Linker say:
Code: [Select]/usr/bin/ld:
//usr/lib/fpc/3.2.2/units/i386-linux/rtl/system.o: warning: relocation
in read-only section `.text.n_system_$$_fpsigaction$longint$psigaction
rec$psigactionrec$$longint'
/usr/bin/ld: warning: creating a DT_TEXTREL in a shared object

"readelf -d" say
Code: [Select]0x00000016 (TEXTREL)                    0x0
0x0000001e (FLAGS)                      TEXTREL

I use Lazarus 3.99 64bit, FPC 3.2.2, Debian 10 64bit.
32bit FPC runtime builded from sources with default options.

I found Fpsigaction in ossysc.inc. Can`t understand, what a problem
with it.

How to build 32bit .so without TEXTREL ?

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abou.almontacir · 2025-02-02 17:03

I'm also working on enabling PIC for Debian and have similar issue.

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PascalDragon · 2025-02-02 19:31

Quote from: abk.964 on December 28, 2024, 10:22:48 am32bit FPC runtime
builded from sources with default options.
Try to rebuild your 32-bit FPC distribution with OPT=-Cg just to be
sure that everything is alright there.

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abk.964 · 2025-02-03 07:16

Use parameter CREATESHARED rebuilding runtime. For example:Code: Bash
 [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i make all
OS_TARGET=linux CPU_TARGET=i386 CREATESHARED=1 It turns on -Cg option.

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dbannon · 2025-02-03 08:27

Despite that warning, it still makes a PIE executable.

My app is built in Debian that way for multiple platforms (except
Power64el) for several years and does not trigger the dreaded lintian
PIE warning.

Davo