Before release 1.3 (roughly), one could build additional programs (after a successful 'make' in ./) in the directory programs/ . Afterwards I see errors like the following:

make zstd-decompress
Makefile:206: update target 'zstd-decompress' due to: ../lib/common/fse_decompress.c ../lib/common/entropy_common.c ../lib/common/pool.c ../lib/common/error_private.c ../lib/common/xxhash.c ../lib/common/threading.c ../lib/common/zstd_common.c ../lib/decompress/zstd_decompress.c ../lib/decompress/huf_decompress.c zstdcli.c fileio.c
cc -I../lib -I../lib/common -I../lib/compress -I../lib/dictBuilder -DZSTD_NEWAPI -DXXH_NAMESPACE=ZSTD_ -I../lib/legacy -O3 -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow -Wstrict-aliasing=1 -Wswitch-enum -Wdeclaration-after-statement -Wstrict-prototypes -Wundef -Wpointer-arith -Wformat-security -Wvla -Wformat=2 -Winit-self -Wfloat-equal -Wwrite-strings -Wredundant-decls -DZSTD_NOBENCH -DZSTD_NODICT -DZSTD_NOCOMPRESS ../lib/common/fse_decompress.c ../lib/common/entropy_common.c ../lib/common/pool.c ../lib/common/error_private.c ../lib/common/xxhash.c ../lib/common/threading.c ../lib/common/zstd_common.c ../lib/decompress/zstd_decompress.c ../lib/decompress/huf_decompress.c zstdcli.c fileio.c -o zstd-decompress
zstdcli.c: In function ‘main’:
zstdcli.c:350:17: warning: variable ‘suffix’ set but not used [-Wunused-but-set-variable]
const char* suffix = ZSTD_EXTENSION;
^~~~~~
zstdcli.c:338:12: warning: variable ‘blockSize’ set but not used [-Wunused-but-set-variable]
size_t blockSize = 0;
^~~~~~~~~
zstdcli.c:336:9: warning: variable ‘setRealTimePrio’ set but not used [-Wunused-but-set-variable]
setRealTimePrio = 0;
^~~~~~~~~~~~~~~
/tmp/cc5dicfP.o: In function main': zstdcli.c:(.text.startup+0x1254): undefined reference to FIO_listMultipleFiles'
collect2: error: ld returned 1 exit status
Makefile:206: recipe for target 'zstd-decompress' failed