From cde2dbab8159959de3fb90ff6cd690d7b2ac469b Mon Sep 17 00:00:00 2001
From: David McFarland <corngood@gmail.com>
Date: Mon, 29 Sep 2025 20:42:13 -0300
Subject: [PATCH] gcc: fix cygwin build

---
 pkgs/development/compilers/gcc/common/libgcc.nix | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/compilers/gcc/common/libgcc.nix b/pkgs/development/compilers/gcc/common/libgcc.nix
index ead87e5e6630..c9f6a7793344 100644
--- a/pkgs/development/compilers/gcc/common/libgcc.nix
+++ b/pkgs/development/compilers/gcc/common/libgcc.nix
@@ -53,10 +53,9 @@ lib.pipe drv
         useLibgccFromTargetLibc = libcCross != null && libcCross ? passthru.libgcc;
 
         enableLibGccOutput =
-          (
-            !(stdenv.targetPlatform.isWindows || stdenv.targetPlatform.isCygwin)
-            || (lib.systems.equals stdenv.targetPlatform stdenv.hostPlatform)
-          )
+          # $libgcc logic is currently hardcoded for .so
+          !stdenv.hostPlatform.isPE
+          && !stdenv.targetPlatform.isPE
           && !langJit
           && !stdenv.hostPlatform.isDarwin
           && enableShared