I am trying to compile the gcc compiler with GCC version >= 12 and when I ran make I got the following error
tti -I../../../../gittea/gcc/libcpp -I.
-I../../../../gittea/gcc/libcpp/../include
-I../../../../gittea/gcc/libcpp/include -c -o expr.o -MT expr.o
-MMD -MP -MF .deps/expr.Tpo ../../../../gittea/gcc/libcpp/expr.cc
../../../../gittea/gcc/libcpp/expr.cc: In function ‘unsigned int
cpp_classify_number(cpp_reader*, const cpp_token*, const char**,
location_t)’:
../../../../gittea/gcc/libcpp/expr.cc:842:35: error: format not a
string literal and no format arguments [-Werror=format-security]
842 | cpp_warning_with_line (pfile, CPP_W_LONG_LONG,
virtual_location,
|
~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
843 | 0, message);
| ~~~~~~~~~~~
../../../../gittea/gcc/libcpp/expr.cc:845:38: error: format not a
string literal and no format arguments [-Werror=format-security]
845 | cpp_pedwarning_with_line (pfile, CPP_W_LONG_LONG,
| ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
846 | virtual_location, 0, message);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../../gittea/gcc/libcpp/expr.cc:855:33: error: format not a
string literal and no format arguments [-Werror=format-security]
855 | cpp_warning_with_line (pfile, CPP_W_SIZE_T_LITERALS,
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
856 | virtual_location, 0, message);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../../gittea/gcc/libcpp/expr.cc:867:42: error: format not a
string literal and no format arguments [-Werror=format-security]
867 | cpp_pedwarning_with_line (pfile, CPP_W_C11_C2X_COMPAT,
| ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
868 | virtual_location, 0, message);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../../gittea/gcc/libcpp/expr.cc:870:39: error: format not a
string literal and no format arguments [-Werror=format-security]
870 | cpp_warning_with_line (pfile, CPP_W_C11_C2X_COMPAT,
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
871 | virtual_location, 0, message);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../../gittea/gcc/libcpp/expr.cc:877:35: error: format not a
string literal and no format arguments [-Werror=format-security]
877 | cpp_error_with_line (pfile, CPP_DL_PEDWARN,
virtual_location, 0,
|
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
878 | message);
| ~~~~~~~~
cc1plus: some warnings are being treated as errors
I have the feeling that I am missing something because this code has not been touched since 2012 (thank git blame) so I am pretty sure that I am missing something, but not sure what.
I am also building this within a nix-shell, so my dependencies are
{
description = "gcc compiler";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, flake-utils }:
flake-utils.lib.eachDefaultSystem (system:
let pkgs = nixpkgs.legacyPackages.${system};
in {
packages = {
default = pkgs.gnumake;
};
formatter = pkgs.nixpkgs-fmt;
devShell = pkgs.mkShell {
buildInputs = [
pkgs.gnumake
pkgs.gcc13
pkgs.libgcc
pkgs.glibc
pkgs.gmp
pkgs.libmpc
pkgs.mpfr
pkgs.flex
pkgs.bison
pkgs.isl
pkgs.pkg-config
pkgs.autoconf-archive
pkgs.autoconf
pkgs.automake
];
};
}
);
}
The problem is how nix/NixOS build the package! More information on this issue https://github.com/NixOS/nixpkgs/issues/18995
This took me a while but I found a problem with the help of Some GCC guru.
Some compiler flags are enabled by default with nix, which can cause hard time for people who work with low-level stuff.
However, the solution is pretty simple. All Nix users need to specify hardeningDisable.
In my case, I just disabled the flake file hardeningDisable = [ "all" ];
Full solution
{
description = "gcc compiler";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, flake-utils }:
flake-utils.lib.eachDefaultSystem (system:
let pkgs = nixpkgs.legacyPackages.${system};
in {
packages = {
default = pkgs.gnumake;
};
formatter = pkgs.nixpkgs-fmt;
devShell = pkgs.mkShell {
hardeningDisable = [ "all" ]; # Disable all hardening flags
buildInputs = [
pkgs.gnumake
pkgs.gcc13
pkgs.gmp
pkgs.libmpc
pkgs.mpfr
pkgs.flex
pkgs.bison
pkgs.isl
pkgs.pkg-config
pkgs.autoconf-archive
pkgs.autoconf
pkgs.automake
];
};
}
);
}