From ca44a1166050b87a7faffcc4e587470849fb98c0 Mon Sep 17 00:00:00 2001
From: Steve Lhomme <robux4@ycbcr.xyz>
Date: Mon, 11 Mar 2019 12:51:20 +0100
Subject: [PATCH] Add wrappers that target Universal Windows

---
 install-wrappers.sh              | 25 ++++++++++++++-----------
 wrappers/clang-target-wrapper.c  | 12 ++++++++++++
 wrappers/clang-target-wrapper.sh | 11 +++++++++++
 3 files changed, 37 insertions(+), 11 deletions(-)

diff --git a/install-wrappers.sh b/install-wrappers.sh
index 5b77a6b..180a4d1 100755
--- a/install-wrappers.sh
+++ b/install-wrappers.sh
@@ -11,6 +11,7 @@ mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
 
 : ${ARCHS:=${TOOLCHAIN_ARCHS-i686 x86_64 armv7 aarch64}}
+: ${TARGET_OSES:=${TOOLCHAIN_TARGET_OSES-mingw32 mingw32uwp}}
 
 if [ -n "$HOST" ] && [ -z "$CC" ]; then
     CC=$HOST-gcc
@@ -49,17 +50,19 @@ else
 fi
 cd $PREFIX/bin
 for arch in $ARCHS; do
-    for exec in clang clang++ gcc g++ cc c99 c11 c++; do
-        ln -sf clang-target-wrapper$CTW_SUFFIX $arch-w64-mingw32-$exec$CTW_LINK_SUFFIX
-    done
-    for exec in ar ranlib nm objcopy strings strip; do
-        ln -sf llvm-$exec$EXEEXT $arch-w64-mingw32-$exec$EXEEXT || true
-    done
-    for exec in windres; do
-        ln -sf $exec-wrapper$EXEEXT $arch-w64-mingw32-$exec$EXEEXT
-    done
-    for exec in ld objdump dlltool; do
-        ln -sf $exec-wrapper.sh $arch-w64-mingw32-$exec
+    for target_os in $TARGET_OSES; do
+        for exec in clang clang++ gcc g++ cc c99 c11 c++; do
+            ln -sf clang-target-wrapper$CTW_SUFFIX $arch-w64-$target_os-$exec$CTW_LINK_SUFFIX
+        done
+        for exec in ar ranlib nm objcopy strings strip; do
+            ln -sf llvm-$exec$EXEEXT $arch-w64-$target_os-$exec$EXEEXT || true
+        done
+        for exec in windres; do
+            ln -sf $exec-wrapper$EXEEXT $arch-w64-$target_os-$exec$EXEEXT
+        done
+        for exec in ld objdump dlltool; do
+            ln -sf $exec-wrapper.sh $arch-w64-$target_os-$exec
+        done
     done
 done
 if [ -n "$EXEEXT" ]; then
diff --git a/wrappers/clang-target-wrapper.c b/wrappers/clang-target-wrapper.c
index 2e8a61b..ee673b2 100644
--- a/wrappers/clang-target-wrapper.c
+++ b/wrappers/clang-target-wrapper.c
@@ -257,6 +257,9 @@ int _tmain(int argc, TCHAR* argv[]) {
     dash = _tcschr(arch, '-');
     if (dash)
         *dash = '\0';
+    TCHAR *target_os = _tcsrchr(target, '-');
+    if (target_os)
+        target_os++;
 
     // Check if trying to compile Ada; if we try to do this, invoking clang
     // would end up invoking <triplet>-gcc with the same arguments, which ends
@@ -293,6 +296,15 @@ int _tmain(int argc, TCHAR* argv[]) {
         // Dwarf is the default here.
     }
 
+    if (target_os && !_tcscmp(target_os, _T("mingw32uwp"))) {
+        // the UWP target is for Windows 10
+        exec_argv[arg++] = _T("-D_WIN32_WINNT=0x0A00 -DWINVER=0x0A00");
+        // the UWP target can only use Windows Store APIs
+        exec_argv[arg++] = _T("-DWINAPI_FAMILY=WINAPI_FAMILY_APP");
+        // the Windows Store API only supports Windows Unicode (some rare ANSI ones are available)
+        exec_argv[arg++] = _T("-DUNICODE");
+    }
+
     exec_argv[arg++] = _T("-target");
     exec_argv[arg++] = target;
     exec_argv[arg++] = _T("-rtlib=compiler-rt");
diff --git a/wrappers/clang-target-wrapper.sh b/wrappers/clang-target-wrapper.sh
index 528f52c..f4dc702 100755
--- a/wrappers/clang-target-wrapper.sh
+++ b/wrappers/clang-target-wrapper.sh
@@ -8,6 +8,7 @@ if [ "$TARGET" = "$BASENAME" ]; then
     TARGET=$DEFAULT_TARGET
 fi
 ARCH="${TARGET%%-*}"
+TARGET_OS="${TARGET##*-}"
 
 # Check if trying to compile Ada; if we try to do this, invoking clang
 # would end up invoking <triplet>-gcc with the same arguments, which ends
@@ -52,6 +53,16 @@ aarch64)
     # Dwarf is the default here.
     ;;
 esac
+case $TARGET_OS in
+mingw32uwp)
+    # the UWP target is for Windows 10
+    FLAGS="$FLAGS -D_WIN32_WINNT=0x0A00 -DWINVER=0x0A00"
+    # the UWP target can only use Windows Store APIs
+    FLAGS="$FLAGS -DWINAPI_FAMILY=WINAPI_FAMILY_APP"
+    # the Windows Store API only supports Windows Unicode (some rare ANSI ones are available)
+    FLAGS="$FLAGS -DUNICODE"
+    ;;
+esac
 
 FLAGS="$FLAGS -target $TARGET"
 FLAGS="$FLAGS -rtlib=compiler-rt"