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c3c28c4d5a
The NDK cross compiler declares the target as __linux (which is not technically incorrect), which triggers the enablement of _GNU_SOURCE in the newly added code that requires the presence of qsort_r() used in the COVER dictionary code. Even though the NDK uses llvm/libc, it doesn't declare qsort_r() in the stdlib.h header. The build fix is to only activate the _GNU_SOURCE macro if the OS is *not* Android, as then we will fallback to the C90 compliant code. This patch should solve the reported issue number #4103.