From 8ec4367ec2c03706137eecfb725bace76b0aab76 Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Mon, 22 Nov 2021 02:06:37 +0000
Subject: [PATCH] Support new c_bindings cfg flag to enable bindings-specific
 logic

---
 .github/workflows/build.yml | 2 +-
 genbindings.sh              | 5 ++---
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a1fde26..e7657d1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -25,7 +25,7 @@ jobs:
         run: |
           # Note that the version tags aren't checked into git
           touch src/version.rs
-          cargo check
+          RUSTFLAGS="--cfg=c_bindings" cargo check
       - name: Install cbindgen
         run: cargo install --force cbindgen
       - name: Checkout Rust-Lightning git
diff --git a/genbindings.sh b/genbindings.sh
index f90aaf0..f572ccc 100755
--- a/genbindings.sh
+++ b/genbindings.sh
@@ -31,10 +31,9 @@ PATH="$PATH:~/.cargo/bin"
 # Set up CFLAGS and RUSTFLAGS vars appropriately for building libsecp256k1 and demo apps...
 BASE_CFLAGS="" # CFLAGS for libsecp256k1
 LOCAL_CFLAGS="" # CFLAGS for demo apps
-BASE_RUSTFLAGS="" # RUSTFLAGS
 
 # Remap paths so that our builds are deterministic
-BASE_RUSTFLAGS="--remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo="
+BASE_RUSTFLAGS="--cfg=c_bindings --remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo="
 
 # If the C compiler supports it, also set -ffile-prefix-map
 echo "int main() {}" > genbindings_path_map_test_file.c
@@ -128,7 +127,7 @@ BIN="$(pwd)/c-bindings-gen/target/release/c-bindings-gen"
 
 function add_crate() {
 	pushd "$LIGHTNING_PATH/$1"
-	RUSTC_BOOTSTRAP=1 cargo rustc --profile=check $3 -- -Zunpretty=expanded > /tmp/$1-crate-source.txt
+	RUSTC_BOOTSTRAP=1 cargo rustc --profile=check $3 -- --cfg=c_bindings -Zunpretty=expanded > /tmp/$1-crate-source.txt
 	popd
 	if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 		sed -i".original" "1i\\
-- 
2.39.5