/system/etc is on a read-only partition. /data should be readable and
writable by uid:1000 and gid:1000.
external/tslib/src \
external/tslib/plugins
-CFLAGS += -DTS_POINTERCAL=\"/system/etc/pointercal\" \
+CFLAGS += -DTS_POINTERCAL=\"/data/system/tslib/pointercal\" \
-DTS_ENV=\"/system/etc/ts.env\" \
-DTSLIB_INTERNAL \
-DGCC_HASCLASSVISIBILITY
external/tslib/src \
external/tslib/tests
-CFLAGS += -DTS_POINTERCAL=\"/system/etc/pointercal\" \
+CFLAGS += -DTS_POINTERCAL=\"/data/system/tslib/pointercal\" \
-DTS_ENV=\"/system/etc/ts.env\" \
-DGCC_HASCLASSVISIBILITY