Cannot compile gcc

[zap8600]

Problem description

I'm trying to compile gcc-12.1.0. At a certain point it says that it needs to be a position independent executable. I've added -fPIE to LDFLAGS, but that didn't fix it.

Steps to reproduce the behavior.

Compile gcc.

What is the expected behavior?

No response

System information

• Termux application version: v0.118.0
• Android OS version: 10
• Device model: SM-G965U

[Grimler91]

You haven't mentioned how you are building it, or which configure args you have used, so impossible for anyone to reproduce your issue.

Have you tried adding -fPIE to CPPFLAGS, or CFLAGS instead?

[zap8600]

Here is how my gcc is currently being configured.
CFLAGS+="-fPIE" CPPFLAGS+="-fPIE" ../gcc-12.1.0/configure --target=i686-elf --prefix="$HOME/opt/cross" --disable-nls --enable-languages=c,c++ --without-headers
As you can tell, it didn't work.

[xtkoba]

I would suggest adding gcc_cv_c_no_fpie=no and gcc_cv_no_pie=no as arguments for ./configure. Or patch gcc/configure{,.ac} to drop those flags.

[xtkoba]

Like this:

https://github.com/ibara/misc/blob/b10af089be9db1d5064d0d71c184d7d425df3680/gnu-d-compiler/gdc-openbsd.diff#L76-L113

[zap8600]

Even though I patched it, it still didn't work.

[zap8600]

If I patch configure, do I need to add gcc_cv_c_no_fpie or not?

[xtkoba]

Should not be needed if patched.

Also --enable-default-pie as a configure arg, maybe. I would grep -i fno-pie some logs (terminal output and config.logs) and see what's going on.

[zap8600]

So gcc compiled successfully. When I tried to compile my OS, i686-elf-ld gave me an error saying undefined reference to _GLOBAL_OFFSET_TABLE_.