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how to add -fPIC into cmake ebuild

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guyuming
Apprentice

Apprentice

Joined: 19 Nov 2020
Posts: 247

Posted: Wed Dec 18, 2024 7:58 am Post subject: how to add -fPIC into cmake ebuild

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i am trying to create an ebuild for https://github.com/arangodb/linenoise-ng and reference that library in my code.

when compile my code, i get what follows:

Code:

/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/lib/liblinenoise.a(linenoise.cpp.o): relocation R_X86_64_PC32 against symbol `stdout@@GLIBC_2.2.5' can not be used when making a shared object; recompile with -fPIC

I think i need to add -fPIC into my ebuild for linenoise-ng which inherit cmake.eclass

I tried what follows, but it does not seem to work.

Code:

src_configure() {
local mycmakeargs=(
-DCMAKE_CXX_FLAGS_RELEASE="-fPIC"
)
cmake_src_configure
}

or

Code:

-DCMAKE_CXX_FLAGS_RELEASE+="-fPIC"

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nicop
Tux's lil' helper

Tux's lil' helper

Joined: 10 Apr 2014
Posts: 103

Posted: Wed Dec 18, 2024 10:15 am Post subject:

you can use before cmake_src_configure : append-cflags -fPIC it needs inherit flag-o-matic or something like -DCMAKE_C_FLAGS_RELEASE="${CFLAGS} -fPIC" ?

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