From 2cbce6b01297b623dc7d098e39b78e6935c11569 Mon Sep 17 00:00:00 2001
From: Artturin <Artturin@artturin.com>
Date: Thu, 7 Jul 2022 21:29:21 +0300
Subject: [PATCH] mesonEmulatorHook: check if the target binaries can be
 executed

this prevents having to bring in the emulator when compiling e.g. pkgsStatic
---
 doc/stdenv/cross-compilation.chapter.md | 4 ++--
 pkgs/top-level/all-packages.nix         | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/doc/stdenv/cross-compilation.chapter.md b/doc/stdenv/cross-compilation.chapter.md
index 7b8f2b4ce6c..0eff70de5ca 100644
--- a/doc/stdenv/cross-compilation.chapter.md
+++ b/doc/stdenv/cross-compilation.chapter.md
@@ -155,14 +155,14 @@ doCheck = stdenv.hostPlatform == stdenv.buildPlatform;
 
 #### Package using Meson needs to run binaries for the host platform during build. {#cross-meson-runs-host-code}
 
-Add `mesonEmulatorHook` cross conditionally to `nativeBuildInputs`.
+Add `mesonEmulatorHook` to `nativeBuildInputs` conditionally on if the target binaries can be executed.
 
 e.g.
 
 ```
 nativeBuildInputs = [
   meson
-] ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
+] ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
   mesonEmulatorHook
 ];
 ```
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ac44da1d0c3..df041ee793e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4131,7 +4131,7 @@ with pkgs;
   # example of an error which this fixes
   # [Errno 8] Exec format error: './gdk3-scan'
   mesonEmulatorHook =
-    if (stdenv.buildPlatform != stdenv.targetPlatform) then
+    if (!stdenv.buildPlatform.canExecute stdenv.targetPlatform) then
       makeSetupHook
         {
           name = "mesonEmulatorHook";
@@ -4142,7 +4142,7 @@ with pkgs;
             '';
           };
         } ../development/tools/build-managers/meson/emulator-hook.sh
-    else throw "mesonEmulatorHook has to be in a cross conditional i.e. (stdenv.buildPlatform != stdenv.hostPlatform)";
+    else throw "mesonEmulatorHook has to be in a conditional to check if the target binaries can be executed i.e. (!stdenv.buildPlatform.canExecute stdenv.hostPlatform)";
 
   meson-tools = callPackage ../misc/meson-tools { };