1 files changed, 87 insertions, 0 deletions
diff --git a/scripts/build/companion_tools/500-dtc.sh b/scripts/build/companion_tools/500-dtc.sh
new file mode 100644
index 0000000..a16ff62
--- /dev/null
+++ b/scripts/build/companion_tools/500-dtc.sh
@@ -0,0 +1,87 @@
+# Build script for DTC (device tree compiler)
+
+do_companion_tools_dtc_get()
+{
+    CT_Fetch DTC
+}
+
+do_companion_tools_dtc_extract()
+{
+    CT_ExtractPatch DTC
+}
+
+do_companion_tools_dtc_for_build()
+{
+    CT_DoStep INFO "Installing dtc for build"
+    CT_mkdir_pushd "${CT_BUILD_DIR}/build-dtc-build"
+    do_dtc_backend \
+        host=${CT_BUILD} \
+        prefix="${CT_BUILD_COMPTOOLS_DIR}" \
+        cflags="${CT_CFLAGS_FOR_BUILD}" \
+        ldflags="${CT_LDFLAGS_FOR_BUILD}"
+    CT_Popd
+    CT_EndStep
+}
+
+do_companion_tools_dtc_for_host()
+{
+    CT_DoStep INFO "Installing dtc for host"
+    CT_mkdir_pushd "${CT_BUILD_DIR}/build-dtc-host"
+    do_dtc_backend \
+        host=${CT_HOST} \
+        prefix="${CT_PREFIX_DIR}" \
+        cflags="${CT_CFLAGS_FOR_HOST}" \
+        ldflags="${CT_LDFLAGS_FOR_HOST}"
+    CT_Popd
+    CT_EndStep
+}
+
+do_dtc_backend()
+{
+    local host
+    local prefix
+    local cflags
+    local ldflags
+    local -a extra_opts
+
+    for arg in "$@"; do
+        eval "${arg// /\\ }"
+    done
+
+    # Override PKG_CONFIG: if pkg-config is not installed, DTC's makefile
+    # misinterprets the error code and tries to enable YAML support while
+    # not linking against libyaml. NO_YAML=1 is sufficient to make the build
+    # pass; PKG_CONFIG=/bin/true just suppresses some scary error messages.
+    extra_opts=( \
+        CC="${host}-gcc" \
+        AR="${host}-ar" \
+        PREFIX="${prefix}" \
+        PKG_CONFIG=/bin/true \
+        NO_PYTHON=1 \
+        NO_YAML=1 \
+        BIN=dtc \
+        )
+    if [ -n "${CT_DTC_VERBOSE}" ]; then
+        extra_opts+=( V=1 )
+    fi
+    case "${host}" in
+    *-mingw32)
+        # Turn off warnings: mingw32 hosts complain about %zd formats even though
+        # they seem to be supported by mingw32. Only build 'dtc', again, because
+        # other binaries use syscalls not available under mingw32, but we also
+        # do not need them. Hijack WARNINGS to override lstat with stat (Windows
+        # does not have symlinks).
+        extra_opts+=( BIN=dtc WARNINGS=-Dlstat=stat )
+        ;;
+    esac
+
+    CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/dtc/." .
+
+    CT_DoLog EXTRA "Building dtc"
+    CT_DoExecLog ALL make all "${extra_opts[@]}"
+
+    # Only install binaries, we don't support shared libraries in installation
+    # directory yet.
+    CT_DoLog EXTRA "Installing dtc"
+    CT_DoExecLog ALL make install-bin "${extra_opts[@]}"
+}