From cabb13197118493b48a8b2087b870fb36916a566 Mon Sep 17 00:00:00 2001
From: Stenzek <stenzek@gmail.com>
Date: Sat, 24 Aug 2024 18:32:28 +1000
Subject: [PATCH] CMake: Enable PIC on Linux

Otherwise ASLR does not work. Also stops LTO builds crashing in the
middle of Qt on Fedora.
---
 CMakeLists.txt                           | 7 +++++++
 scripts/deps/build-dependencies-linux.sh | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b4e9ba6df..7eaa3b4fb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,6 +34,13 @@ detect_cache_line_size()
 # Build options. Depends on system attributes.
 include(DuckStationBuildOptions)
 
+# Enable PIC on Linux, otherwise the builds do not support ASLR.
+if(LINUX OR BSD)
+  include(CheckPIESupported)
+  check_pie_supported()
+  set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
+endif()
+
 # Set _DEBUG macro for Debug builds.
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -D_DEBUG")
diff --git a/scripts/deps/build-dependencies-linux.sh b/scripts/deps/build-dependencies-linux.sh
index eafaf2bd2..bc038b0e0 100755
--- a/scripts/deps/build-dependencies-linux.sh
+++ b/scripts/deps/build-dependencies-linux.sh
@@ -143,7 +143,7 @@ echo "Building libbacktrace..."
 rm -fr "libbacktrace-$LIBBACKTRACE"
 unzip "$LIBBACKTRACE.zip"
 cd "libbacktrace-$LIBBACKTRACE"
-./configure --prefix="$INSTALLDIR"
+./configure --prefix="$INSTALLDIR" --with-pic
 make
 make install
 cd ..