From dabd8dbedd70ed7f50de99b719403f1867a4bab2 Mon Sep 17 00:00:00 2001
From: Daniel Bertalan <dani@danielbertalan.dev>
Date: Fri, 24 Sep 2021 22:15:38 +0200
Subject: [PATCH] Ports: Make it possible to build (some) ports with Clang

This commit introduces the changes needed in the port build system that
will allow us to compile ports with Clang. Note that many ports still
don't build, especially due to linker differences. Fixing these is
outside the scope of this PR.

For now, building bash, ncurses and nano is known to work. Bash runs
fine, while nano crashes due to DT_VERSYM not being supported by our
dynamic loader.
---
 Ports/.hosted_defs.sh  | 24 ++++++++++++++++++------
 Ports/.port_include.sh |  1 +
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/Ports/.hosted_defs.sh b/Ports/.hosted_defs.sh
index f7c3c4d8c0b..c430da4012f 100644
--- a/Ports/.hosted_defs.sh
+++ b/Ports/.hosted_defs.sh
@@ -1,11 +1,23 @@
 #!/usr/bin/env bash
+
 export SERENITY_SOURCE_DIR="$(realpath "${SCRIPT}/../")"
-export SERENITY_BUILD_DIR="${SERENITY_SOURCE_DIR}/Build/${SERENITY_ARCH}"
-export CC="${SERENITY_ARCH}-pc-serenity-gcc"
-export CXX="${SERENITY_ARCH}-pc-serenity-g++"
-export AR="${SERENITY_ARCH}-pc-serenity-ar"
-export RANLIB="${SERENITY_ARCH}-pc-serenity-ranlib"
-export PATH="${SERENITY_SOURCE_DIR}/Toolchain/Local/${SERENITY_ARCH}/bin:${HOST_PATH}"
+
+if [ "$SERENITY_TOOLCHAIN" = "Clang" ]; then
+    export SERENITY_BUILD_DIR="${SERENITY_SOURCE_DIR}/Build/${SERENITY_ARCH}clang"
+    export CC="clang --target=${SERENITY_ARCH}-pc-serenity --sysroot=${SERENITY_BUILD_DIR}/Root"
+    export CXX="clang++ --target=${SERENITY_ARCH}-pc-serenity --sysroot=${SERENITY_BUILD_DIR}/Root"
+    export AR="llvm-ar"
+    export RANLIB="llvm-ranlib"
+    export PATH="${SERENITY_SOURCE_DIR}/Toolchain/Local/clang/bin:${HOST_PATH}"
+else
+    export SERENITY_BUILD_DIR="${SERENITY_SOURCE_DIR}/Build/${SERENITY_ARCH}"
+    export CC="${SERENITY_ARCH}-pc-serenity-gcc"
+    export CXX="${SERENITY_ARCH}-pc-serenity-g++"
+    export AR="${SERENITY_ARCH}-pc-serenity-ar"
+    export RANLIB="${SERENITY_ARCH}-pc-serenity-ranlib"
+    export PATH="${SERENITY_SOURCE_DIR}/Toolchain/Local/${SERENITY_ARCH}/bin:${HOST_PATH}"
+fi
+
 export PKG_CONFIG_DIR=""
 export PKG_CONFIG_SYSROOT_DIR="${SERENITY_BUILD_DIR}/Root"
 export PKG_CONFIG_LIBDIR="${PKG_CONFIG_SYSROOT_DIR}/usr/lib/pkgconfig/:${PKG_CONFIG_SYSROOT_DIR}/usr/local/lib/pkgconfig"
diff --git a/Ports/.port_include.sh b/Ports/.port_include.sh
index d2fe8cc4ffd..acfab9ec145 100755
--- a/Ports/.port_include.sh
+++ b/Ports/.port_include.sh
@@ -3,6 +3,7 @@ set -eu
 
 SCRIPT="$(dirname "${0}")"
 export SERENITY_ARCH="${SERENITY_ARCH:-i686}"
+export SERENITY_TOOLCHAIN="${SERENITY_TOOLCHAIN:-GCC}"
 
 if [ -z "${HOST_CC:=}" ]; then
     export HOST_CC="${CC:=cc}"