GCC/GFortran compiled without fPIC

[mboisson]

Issue description

I compiled gfortran 5.4 (the reciped from branch 16.09). When I then try to compile something with -fPIC, I get errors such as:

/cvmfs/soft.computecanada.ca/nix/store/c8bdsjsazkvdiz59sjb2g471kjmg70a7-binutils-2.27/bin/ld: /cvmfs/soft.computecanada.ca/nix/var/nix/profiles/gcc-5.4.0/lib64/libgfortran.a(list_read.o): relocation R_X86_64_32S against `.rodata.eat_separator' can not be used when making a shared object; recompile with -fPIC
/cvmfs/soft.computecanada.ca/nix/store/c8bdsjsazkvdiz59sjb2g471kjmg70a7-binutils-2.27/bin/ld: /cvmfs/soft.computecanada.ca/nix/var/nix/profiles/gcc-5.4.0/lib64/libgfortran.a(open.o): relocation R_X86_64_32 against `.rodata.str1.8' can not be used when making a shared object; recompile with -fPIC
/cvmfs/soft.computecanada.ca/nix/store/c8bdsjsazkvdiz59sjb2g471kjmg70a7-binutils-2.27/bin/ld: /cvmfs/soft.computecanada.ca/nix/var/nix/profiles/gcc-5.4.0/lib64/libgfortran.a(read.o): relocation R_X86_64_32S against `.rodata.masks.8847' can not be used when making a shared object; recompile with -fPIC
/cvmfs/soft.computecanada.ca/nix/store/c8bdsjsazkvdiz59sjb2g471kjmg70a7-binutils-2.27/bin/ld: /cvmfs/soft.computecanada.ca/nix/var/nix/profiles/gcc-5.4.0/lib64/libquadmath.a(quadmath-printf.o): relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC
/cvmfs/soft.computecanada.ca/nix/store/c8bdsjsazkvdiz59sjb2g471kjmg70a7-binutils-2.27/bin/ld: /cvmfs/soft.computecanada.ca/nix/var/nix/profiles/gcc-5.4.0/lib64/libquadmath.a(printf_fphex.o): relocation R_X86_64_32 against `.rodata.str4.4' can not be used when making a shared object; recompile with -fPIC
/cvmfs/soft.computecanada.ca/nix/store/c8bdsjsazkvdiz59sjb2g471kjmg70a7-binutils-2.27/bin/ld: /cvmfs/soft.computecanada.ca/nix/var/nix/profiles/gcc-5.4.0/lib64/libquadmath.a(printf_fp.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC
/cvmfs/soft.computecanada.ca/nix/store/c8bdsjsazkvdiz59sjb2g471kjmg70a7-binutils-2.27/bin/ld: /cvmfs/soft.computecanada.ca/nix/var/nix/profiles/gcc-5.4.0/lib64/libgfortran.a(error.o): relocation R_X86_64_PC32 against symbol `strlen@@GLIBC_2.2.5' can not be used when making a shared object; recompile with -fPIC

Any reason why it is not compiled with fPIC, and any way to recompile it with fPIC ?

Technical details

• System: (NixOS: nixos-version, Ubuntu/Fedora: lsb_release -a, ...)

[mboisson@build-node GCC]$ lsb_release -a
LSB Version:    n/a
Distributor ID: CentOS
Description:    CentOS Linux release 7.2.1511 (Core)
Release:        7.2.1511
Codename:       Core

• Nix version: (run nix-env --version)
  nix-env (Nix) 1.11.4

• Nixpkgs version: (run nix-instantiate --eval '<nixpkgs>' -A lib.nixpkgsVersion)
  16.09

[veprbl]

Can you add some instructions on how to reproduce this?

[mboisson]

Turns out this had to do with harderning flags in GCC. Once we disabled the hardening flags, it compiled fine.