pkgsStatic.gcc fails to build for Raspberry Pi

[langston-barrett]

Describe the bug
Looks like patchelf shouldn't be run on the output of GCC when building in static. Here's the last bit of the log:

Removing empty /nix/store/mh74c5z7kb3b84qahfa1as2850hxl9n1-gcc-debug-9.3.0-armv6l-unknown-linux-musleabihf/share/gcc-9.3.0/ and (possibly) its parents
patchelf is /nix/store/kzbgdws5kwpsw874nr5n18ayhb7n1340-patchelf-0.9/bin/patchelf
cannot find section .dynamic
builder for '/nix/store/9mzlwscgwmvwxv71qxb8na6734zy0wmb-gcc-debug-9.3.0-armv6l-unknown-linux-musleabihf.drv' failed with exit code 1
cannot build derivation '/nix/store/c2lc9wprjg11jfa0qfc0vgkmi1d8v9ad-gcc-debug-wrapper-9.3.0.drv': 1 dependencies couldn't be built
error: build of '/nix/store/c2lc9wprjg11jfa0qfc0vgkmi1d8v9ad-gcc-debug-wrapper-9.3.0.drv' failed

This might be totally misguided, but I attempted to fix this like so to no avail:

diff --git a/pkgs/development/compilers/gcc/9/default.nix b/pkgs/development/compilers/gcc/9/default.nix
index 5785782a671..54d3909255d 100644
--- a/pkgs/development/compilers/gcc/9/default.nix
+++ b/pkgs/development/compilers/gcc/9/default.nix
@@ -144,6 +144,11 @@ stdenv.mkDerivation ({
   inherit noSysDirs staticCompiler crossStageStatic
     libcCross crossMingw;

+  # If GDB has been built as a static executable, running patchelf produces an
+  # error "cannot find section .dynamic", at least when cross-compiling for ARM
+  # on x86_64.
+  dontPatchELF = staticCompiler;
+
   depsBuildBuild = [ buildPackages.stdenv.cc ];
   nativeBuildInputs = [ texinfo which gettext ]
     ++ (optional (perl != null) perl);
diff --git a/pkgs/top-level/static.nix b/pkgs/top-level/static.nix
index 6f331b20d3f..c8fcada095c 100644
--- a/pkgs/top-level/static.nix
+++ b/pkgs/top-level/static.nix
@@ -179,6 +179,9 @@ in {
     static = true;
     twisted = null;
   };
+  gcc-unwrapped = super.gcc-unwrapped.override {
+    staticCompiler = true;
+  };
   gmp = super.gmp.override {
     withStatic = true;
   };

To Reproduce
Steps to reproduce the behavior:

nix-build . --arg crossSystem '(import <nixpkgs> {}).lib.systems.examples.raspberryPi' -A pkgsStatic.gcc

Expected behavior
The build should succeed.

Additional context

Notify maintainers

Metadata

 - system: `"x86_64-linux"`
 - host os: `Linux 5.4.41, NixOS, 20.03.1950.48723f48ab9 (Markhor)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.4`
 - channels(root): `"nixos-20.03.1950.48723f48ab9, nixos-hardware"`
 - channels(siddharthist): `"home-manager-20.03, unstable-20.09pre223023.fce7562cf46"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module:

[matthewbauer]

This is probably from

nixpkgs/pkgs/development/compilers/gcc/builder.sh

Lines 244 to 251 in 7206675

	if type "patchelf"; then
	# Take out the bootstrap-tools from the rpath, as it's not needed at all having $out
	for i in $(find "$out"/libexec/gcc/*/*/* -type f -a \! -name '*.la'); do
	PREV_RPATH=`patchelf --print-rpath "$i"`
	NEW_RPATH=`echo "$PREV_RPATH" | sed 's,:[^:]*bootstrap-tools/lib,,g'`
	patchelf --set-rpath "$NEW_RPATH" "$i" && echo OK
	done
	fi

. Any patchelf --print-rpath call will fail like that on static executables. We need to have a fallback.

[stale]

I marked this as stale due to inactivity. → More info