From e57a220f810a9698c5df27a7488839ebea3226e2 Mon Sep 17 00:00:00 2001
From: John Ericson <Ericson2314@Yahoo.com>
Date: Thu, 29 Jun 2017 20:28:27 -0400
Subject: [PATCH] stdenv, swift: Use `local fd` in is* bash functions for
 hygiene

---
 .../development/compilers/swift/patches/build-script-pax.patch | 3 ++-
 pkgs/stdenv/generic/setup.sh                                   | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/swift/patches/build-script-pax.patch b/pkgs/development/compilers/swift/patches/build-script-pax.patch
index 9f1976a2d88..fa2ccdf9d5c 100644
--- a/pkgs/development/compilers/swift/patches/build-script-pax.patch
+++ b/pkgs/development/compilers/swift/patches/build-script-pax.patch
@@ -1,12 +1,13 @@
 --- swift/utils/build-script-impl	2017-01-23 12:47:20.401326309 -0600
 +++ swift-pax/utils/build-script-impl	2017-01-23 13:24:10.339366996 -0600
-@@ -1823,6 +1823,16 @@ function set_lldb_xcodebuild_options() {
+@@ -1823,6 +1823,17 @@ function set_lldb_xcodebuild_options() {
      fi
  }
  
 +## XXX: Taken from nixpkgs /pkgs/stdenv/generic/setup.sh
 +isELF() {
 +    local fn="$1"
++    local fd
 +    local magic
 +    exec {fd}< "$fn"
 +    read -n 4 -u $fd magic
diff --git a/pkgs/stdenv/generic/setup.sh b/pkgs/stdenv/generic/setup.sh
index 191abf7596b..e5d2ba8682d 100644
--- a/pkgs/stdenv/generic/setup.sh
+++ b/pkgs/stdenv/generic/setup.sh
@@ -194,6 +194,7 @@ _addRpathPrefix() {
 # Return success if the specified file is an ELF object.
 isELF() {
     local fn="$1"
+    local fd
     local magic
     exec {fd}< "$fn"
     read -n 4 -u $fd magic
@@ -205,6 +206,7 @@ isELF() {
 # "#!").
 isScript() {
     local fn="$1"
+    local fd
     local magic
     if ! [ -x /bin/sh ]; then return 0; fi
     exec {fd}< "$fn"