Compiling with PIE on Linux

[jakobssystems]

I have a small app for both Windows and Linux and seperated code for these platforms with compiler directives:

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	#IF DEFINED(__FB_WIN32__)
		'Windows related only
	#ELSEIF DEFINED(__FB_LINUX__)
		'Linux stuff here
	#ENDIF

When I try to compile with PIE I am getting error message from the Code inside FB_WIN32 Block which is of course wrong because I am using static pointers in there. (PIE is Linux only).

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xxx.bas(29) warning 3(2): Passing different pointer types, at parameter 1 of LSTRCPYW()
ld: /usr/lib/gcc/x86_64-linux-gnu/14/crtbegin.o: relocation R_X86_64_32 against hidden symbol `__TMC_END__' can not be used when making a PIE object
ld: failed to set dynamic section sizes: bad value

What I am missing? Without PIE everything compiles and runs fine. though dpkg linter gives "hardening-no-pie" warnings.
it looks like a bug, the compiler should ignore the Windows related part.

this is my compiler command:

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fbc -Wc -fPIC -Wl -pie -O 3 -s gui -strip -exx -w all $FILENAME.bas

[jakobssystems]

I have even tried to seperate the culpit function like that:

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#IF DEFINED(__FB_WIN32__)
	#Include "win_ReadClipboard.bas"
#ELSEIF DEFINED(__FB_LINUX__)
	#Include "linux_ReadClipboard.bas"
#ENDIF

w/o success. the compiler ignored the #IF and throws an error:

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in_ReadClipboard.bas(15) warning 3(2): Passing different pointer types, at parameter 1 of LSTRCPYW()

it shouldn't do this!

[caseih]

I created a simple test program:

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#IF DEFINED(__FB_WIN32__)
	syntax error
#ELSEIF DEFINED(__FB_LINUX__)
	'Linux stuff here
	print "Linux here."
#ENDIF

When I compile with those flags I get:

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$ /opt/FreeBASIC/bin/fbc -Wc -fPIC -Wl -pie -O 3 -s gui -strip -exx -w all pietest.bas
ld: /usr/lib/gcc/x86_64-redhat-linux/14/crtbegin.o: relocation R_X86_64_32 against hidden symbol `__TMC_END__' can not be used when making a PIE object
ld: failed to set dynamic section sizes: bad value

But the code in the windows-specific section definitely gets excluded (or else I'd get a syntax error).

[jakobssystems]

good morning, my code is here:
https://codeberg.org/tomas-jakobs/clipb ... uditor.bas

Normal compile w/o PIE says:

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clipboard-auditor.bas(29) warning 3(2): Passing different pointer types, at parameter 1 of LSTRCPYW()

which seems clear because I used any ptr in the windows block, but at least it compiles.

Compile with PIE stops compiling

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clipboard-auditor.bas(29) warning 3(2): Passing different pointer types, at parameter 1 of LSTRCPYW()
ld: /usr/lib/gcc/x86_64-linux-gnu/14/crtbegin.o: relocation R_X86_64_32 against hidden symbol `__TMC_END__' can not be used when making a PIE object
ld: failed to set dynamic section sizes: bad value

For me this is a compiler error and/or I cannot strip when compiling with PIE?
I am not familiar with compilers and how they internally work, but it seems, that stripping debug infos does not work with compiling in PIE for linux, does it?
Nevertheless the warning inside Windows block shouldn't be thrown when compiling for Linux, this is clearly an error.

My compile script for both win and linux is here:
https://codeberg.org/tomas-jakobs/clipb ... osscompile

[RetardedAndProud]

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fbc -Wc -fPIC -Wl -pie -O 3 -s gui -strip -exx -w all $FILENAME.bas

Add -pic to fbc options...

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fbc -pic -Wc -fPIC -Wl -pie -O 3 -s gui -strip -exx -w all $FILENAME.bas

Worked for me

[jakobssystems]

Yes, this worked for me now too, thank you a lot!