From 59d8cd8cb653b922b2dd125062c35981295d4ca4 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Mon, 5 Apr 2021 16:26:01 +0100
Subject: [PATCH 1/2] tracy: force-disable LTO for darwin

---
 pkgs/development/tools/tracy/default.nix | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/tools/tracy/default.nix b/pkgs/development/tools/tracy/default.nix
index b7a324ca29d..8d597ce5eda 100644
--- a/pkgs/development/tools/tracy/default.nix
+++ b/pkgs/development/tools/tracy/default.nix
@@ -1,6 +1,8 @@
 { stdenv, lib, darwin, fetchFromGitHub, tbb, gtk3, glfw, pkg-config, freetype, Carbon, AppKit, capstone }:
 
-stdenv.mkDerivation rec {
+let
+  disableLTO = stdenv.cc.isClang && stdenv.isDarwin;  # workaround issue #19098
+in stdenv.mkDerivation rec {
   pname = "tracy";
   version = "0.7.7";
 
@@ -19,7 +21,10 @@ stdenv.mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = [ ]
     ++ lib.optional stdenv.isLinux "-ltbb"
-    ++ lib.optional stdenv.cc.isClang "-faligned-allocation";
+    ++ lib.optional stdenv.cc.isClang "-faligned-allocation"
+    ++ lib.optional disableLTO "-fno-lto";
+
+  NIX_CFLAGS_LINK = lib.optional disableLTO "-fno-lto";
 
   buildPhase = ''
     make -j $NIX_BUILD_CORES -C profiler/build/unix release

From d5cbe9183fe97818565fe3a2e1d4dc9467f1f5c1 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Mon, 5 Apr 2021 19:00:53 +0100
Subject: [PATCH 2/2] tracy: fixupPhase -> postFixup, because linting

---
 pkgs/development/tools/tracy/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/tools/tracy/default.nix b/pkgs/development/tools/tracy/default.nix
index 8d597ce5eda..724e74098de 100644
--- a/pkgs/development/tools/tracy/default.nix
+++ b/pkgs/development/tools/tracy/default.nix
@@ -40,7 +40,7 @@ in stdenv.mkDerivation rec {
     install -D ./update/build/unix/update-release $out/bin/update
   '';
 
-  fixupPhase = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.isDarwin ''
     install_name_tool -change libcapstone.4.dylib ${capstone}/lib/libcapstone.4.dylib $out/bin/Tracy
   '';