Fixed by defining TARGET=linux, as suggested in the README.
By default TARGET is derived from the host using uname -s,
which produces build errors on a non-linux hosts:
TARGET is not set; trying to determine target based on host OS....
Detected OS is Darwin
Build target is macos
...
x86_64-openwrt-linux-musl-g++: error: unrecognized command-line option '-arch'
Helped-by: Tianling Shen <cnsztl@immortalwrt.org>
Signed-off-by: Georgi Valkov <gvalkov@gmail.com>
TARGET_CXXFLAGS += -std=c++11 -fno-rtti
TARGET_LDFLAGS += -Wl,--as-needed
+MAKE_FLAGS += TARGET=linux
define Package/gdisk/install
$(INSTALL_DIR) $(1)/usr/bin