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| -rw-r--r-- | tests/files/README | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/tests/files/README b/tests/files/README index a3208459..b3c4795e 100644 --- a/tests/files/README +++ b/tests/files/README @@ -76,10 +76,23 @@ good-1-arm64-lzma2-1.xz uses the ARM64 filter and LZMA2. The uncompressed data is constructed so that it tests integer - wrap around and sign extension. + wrap around and sign extension. To recreate the file, compress + using XZ Utils 5.4.x (newer may or may not work too): + + ./debug/testfilegen-arm64 \ + | xz -T1 -Ccrc32 --arm64 \ + --lzma2=dict=64KiB,lp=2,lc=2 \ + > good-1-arm64-lzma2-1.xz good-1-arm64-lzma2-2.xz is like good-1-arm64-lzma2-1.xz but with non-zero start offset. XZ Embedded doesn't support this file. + To recreate the file, compress using XZ Utils 5.4.x (newer may or + may not work too): + + ./debug/testfilegen-arm64 \ + | xz -T1 -Ccrc32 --arm64=start=4294963200 \ + --lzma2=dict=64KiB,lp=2,lc=2 \ + > good-1-arm64-lzma2-2.xz good-1-lzma2-1.xz has two LZMA2 chunks, of which the second sets new properties. |