guix: use patchelf to strip interpreter and RPATH

contrib/guix/build.sh

@@ -22,7 +22,6 @@ EOF
 
 # We need to set RUSTC_BOOTSTRAP=1 as a workaround to be able to use unstable
 # features in the GUI dependencies
-# FIXME: GUIX_LD_WRAPPER_DISABLE_RPATH=yes
 RUSTC_BOOTSTRAP=1 cargo -vvv \
     --color always \
     --frozen \
@@ -31,4 +30,11 @@ RUSTC_BOOTSTRAP=1 cargo -vvv \
     --release \
     --target-dir "$TARGET_DIR"
 
+# Assume 64bits. Even bitcoind doesn't ship 32bits binaries for x86.
+# FIXME: is there a cleaner way than using patchelf for this?
+patchelf --set-interpreter /lib64/ld-linux-x86-64.so.2 "$TARGET_DIR/release/$BINARY_NAME"
+
+# FIXME: Find a way to use GUIX_LD_WRAPPER_DISABLE_RPATH=yes instead
+patchelf --remove-rpath "$TARGET_DIR/release/$BINARY_NAME"
+
 set +ex

contrib/guix/guix-build.sh

@@ -101,6 +101,16 @@ for project_folder in "" "gui"; do
         sed -i '/checksum/d' "$BUILD_ROOT/Cargo.lock"
     fi
 
+    # FIXME: find a cleaner way to get the binary name, or get rid of patchelf entirely
+    if [ "$project_folder" = "" ]; then
+        BINARY_NAME="lianad"
+    elif [ "$project_folder" = "gui" ]; then
+        BINARY_NAME="liana-gui"
+    else
+        echo "Can't determine binary name"
+        exit 1
+    fi
+
     # Bootstrap a reproducible environment as specified by the manifest in an isolated
     # container, and build the project.
     time_machine shell --no-cwd \
@@ -113,7 +123,7 @@ for project_folder in "" "gui"; do
                --share="$PROJECT_OUT_DIR=$PROJECT_OUT_DIR" \
                --container \
                -m $PWD/contrib/guix/manifest.scm \
-               -- env CC=gcc VENDOR_DIR="$PROJECT_VENDOR_DIR" TARGET_DIR="$PROJECT_OUT_DIR" \
+               -- env CC=gcc VENDOR_DIR="$PROJECT_VENDOR_DIR" TARGET_DIR="$PROJECT_OUT_DIR" BINARY_NAME="$BINARY_NAME" \
                   /bin/sh -c "cd /liana && ./build.sh"
 done
 

contrib/guix/manifest.scm

@@ -5,7 +5,6 @@
         "coreutils"
         "pkg-config" ;; For the GUI
         "eudev" ;; For the GUI
-        "cmake" ;; For the GUI
-        "make" ;; For the GUI
         "fontconfig" ;; For the GUI
+        "patchelf"
         "gcc-toolchain@10.3.0"))