I tried the following flags but I still get the error
set -x
API=$(getprop ro.build.version.sdk)
FLAGS="-D__ANDROID_API__=$API -D__ANDROID_MIN_SDK_VERSION__=$API -DANDROID_NATIVE_API_LEVEL=$API -DANDROID_ABI=$(getprop ro.vendor.product.cpu.abilist64)"
PSPDEV=/data/data/com.termux/files/home/PSPDEV-ANDROID \
PATH=/data/data/com.termux/files/home/PSPDEV-ANDROID/bin:$PATH \
CFLAGS="$FLAGS" \
CXXFLAGS="$FLAGS" \
LOCAL_PACKAGE_BUILD=1 \
./build-all.sh