The package seems too new to be recognised by bugs.debian.org. It failed to build:
https://buildd.debian.org/status/package.php?p=haskell-charsetdetect-ae&suite=sid A search for '"prcpucfg_linux.h" aarch64' found: https://chromium.googlesource.com/chromium/src/+/2c03ccaa0ef2f8faa77254f93795df4a639a57ec%5E!/ I'm attaching a version of that patch that applies cleanly. It seems to fix the build on arm64.
diff -ru haskell-charsetdetect-ae-1.0.1.orig/libcharsetdetect/nspr-emu/prcpucfg_linux.h haskell-charsetdetect-ae-1.0.1/libcharsetdetect/nspr-emu/prcpucfg_linux.h --- haskell-charsetdetect-ae-1.0.1.orig/libcharsetdetect/nspr-emu/prcpucfg_linux.h +++ haskell-charsetdetect-ae-1.0.1/libcharsetdetect/nspr-emu/prcpucfg_linux.h @@ -509,6 +509,59 @@ #define PR_BYTES_PER_WORD_LOG2 2 #define PR_BYTES_PER_DWORD_LOG2 3 +#elif defined(__aarch64__) + +#ifdef __AARCH64EB__ +#undef IS_LITTLE_ENDIAN +#define IS_BIG_ENDIAN 1 +#elif defined(__AARCH64EL__) +#define IS_LITTLE_ENDIAN 1 +#undef IS_BIG_ENDIAN +#else +#error "Unknown Aarch64 endianness." +#endif +#define IS_64 + +#define PR_BYTES_PER_BYTE 1 +#define PR_BYTES_PER_SHORT 2 +#define PR_BYTES_PER_INT 4 +#define PR_BYTES_PER_INT64 8 +#define PR_BYTES_PER_LONG 8 +#define PR_BYTES_PER_FLOAT 4 +#define PR_BYTES_PER_DOUBLE 8 +#define PR_BYTES_PER_WORD 8 +#define PR_BYTES_PER_DWORD 8 + +#define PR_BITS_PER_BYTE 8 +#define PR_BITS_PER_SHORT 16 +#define PR_BITS_PER_INT 32 +#define PR_BITS_PER_INT64 64 +#define PR_BITS_PER_LONG 64 +#define PR_BITS_PER_FLOAT 32 +#define PR_BITS_PER_DOUBLE 64 +#define PR_BITS_PER_WORD 64 + +#define PR_BITS_PER_BYTE_LOG2 3 +#define PR_BITS_PER_SHORT_LOG2 4 +#define PR_BITS_PER_INT_LOG2 5 +#define PR_BITS_PER_INT64_LOG2 6 +#define PR_BITS_PER_LONG_LOG2 6 +#define PR_BITS_PER_FLOAT_LOG2 5 +#define PR_BITS_PER_DOUBLE_LOG2 6 +#define PR_BITS_PER_WORD_LOG2 6 + +#define PR_ALIGN_OF_SHORT 2 +#define PR_ALIGN_OF_INT 4 +#define PR_ALIGN_OF_LONG 8 +#define PR_ALIGN_OF_INT64 8 +#define PR_ALIGN_OF_FLOAT 4 +#define PR_ALIGN_OF_DOUBLE 8 +#define PR_ALIGN_OF_POINTER 8 +#define PR_ALIGN_OF_WORD 8 + +#define PR_BYTES_PER_WORD_LOG2 3 +#define PR_BYTES_PER_DWORD_LOG2 3 + #elif defined(__hppa__) #undef IS_LITTLE_ENDIAN
