[cfe-dev] Clang function-sections flag

[via cfe-dev]

Try adding -fno-function-sections to make sure it's turned off (sounds like it is on by default for your target).
--paulr

From: cfe-dev <cfe-dev-bounces at lists.llvm.org> On Behalf Of Gaier, Bjoern via cfe-dev
Sent: Wednesday, January 20, 2021 5:01 AM
To: Clang Dev <cfe-dev at lists.llvm.org>
Subject: [cfe-dev] Clang function-sections flag

Hey Clang-people,

I have a nooby question about the -ffunction-sections flag of Clang.
As far as I used to understand, setting this flag means, that every function gets their own section. Makes sense so far.

Recently I started to look into the ELF format a bit so that subject came up. I created a macro to quickly generate me some functions:
#define wuff(a, b) \
a##b

#define crap(num) \
int wuff(schwimmflugel, num) () \
{ \
    return num; \
}

Creating the object file and looking into it, I found a section header for every of my functions no matter if I set the -ffunction-sections flag or not.
Also setting my function to static didn't changed a thing.... well besides from having those functions striped from my object file xD

So... what does that flag effect?

Kind greetings
Björn
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