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Also Allow/Document/Test Excluding dfast and Up

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This commit is contained in:
W. Felix Handte 2023-05-04 12:31:41 -04:00
parent cc1ffe0bd6
commit 5490c75dda
3 changed files with 10 additions and 1 deletions
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1
.github/workflows/dev-short-tests.yml vendored
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@ -349,6 +349,7 @@ jobs:
make clean && make -j all MOREFLAGS="-Werror -DZSTD_NO_INLINE -DZSTD_STRIP_ERROR_STRINGS"
make clean && make check MOREFLAGS="-Werror -DZSTD_NO_INLINE -DZSTD_STRIP_ERROR_STRINGS"
make clean && make check ZSTD_LIB_EXCLUDE_COMPRESSORS_DFAST_AND_UP=1 MOREFLAGS="-Werror"
make clean && make check ZSTD_LIB_EXCLUDE_COMPRESSORS_GREEDY_AND_UP=1 MOREFLAGS="-Werror"
dynamic-bmi2:
runs-on: ubuntu-latest

5
lib/README.md
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@ -123,7 +123,10 @@ The file structure is designed to make this selection manually achievable for an
strategies. In environments where the higher compression levels aren't used,
it is possible to exclude all but the fastest strategy with
`ZSTD_LIB_EXCLUDE_COMPRESSORS_DFAST_AND_UP=1`. (Note that this will change
the behavior of the default compression level.)
the behavior of the default compression level.) Or if you want to retain the
default compressor as well, you can set
`ZSTD_LIB_EXCLUDE_COMPRESSORS_GREEDY_AND_UP=1`, at the cost of an additional
~20KB or so.
For squeezing the last ounce of size out, you can also define
`ZSTD_NO_INLINE`, which disables inlining, and `ZSTD_STRIP_ERROR_STRINGS`,

5
lib/libzstd.mk
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@ -48,6 +48,7 @@ endif
ZSTD_NO_ASM ?= 0
ZSTD_LIB_EXCLUDE_COMPRESSORS_DFAST_AND_UP ?= 0
ZSTD_LIB_EXCLUDE_COMPRESSORS_GREEDY_AND_UP ?= 0
##################################################################
# libzstd helpers
@ -182,6 +183,10 @@ endif
ifneq ($(ZSTD_LIB_EXCLUDE_COMPRESSORS_DFAST_AND_UP), 0)
CFLAGS += -DZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR
else
ifneq ($(ZSTD_LIB_EXCLUDE_COMPRESSORS_GREEDY_AND_UP), 0)
CFLAGS += -DZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR -DZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR
endif
endif
ifneq ($(ZSTD_LEGACY_SUPPORT), 0)