After running make，I did not see ref.fa

[tudousiZzz]

After running make, there were no errors, but I did not see ref.fa. Do I need to download ref.fa from somewhere else?"
[root@localhost bwa]# make
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS utils.c -o utils.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS kthread.c -o kthread.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS kstring.c -o kstring.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS ksw.c -o ksw.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwt.c -o bwt.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bntseq.c -o bntseq.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwa.c -o bwa.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwamem.c -o bwamem.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwamem_pair.c -o bwamem_pair.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwamem_extra.c -o bwamem_extra.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS malloc_wrap.c -o malloc_wrap.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS QSufSort.c -o QSufSort.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwt_gen.c -o bwt_gen.o
bwt_gen.c: In function ‘BWTIncBuildRelativeRank’:
bwt_gen.c:879:10: warning: variable ‘oldInverseSa0RelativeRank’ set but not used [-Wunused-but-set-variable]
bgint_t oldInverseSa0RelativeRank = 0;
^~~~~~~~~~~~~~~~~~~~~~~~~
bwt_gen.c: In function ‘BWTIncMergeBwt’:
bwt_gen.c:953:15: warning: variable ‘bitsInWordMinusBitPerChar’ set but not used [-Wunused-but-set-variable]
unsigned int bitsInWordMinusBitPerChar;
^~~~~~~~~~~~~~~~~~~~~~~~~
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS rope.c -o rope.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS rle.c -o rle.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS is.c -o is.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtindex.c -o bwtindex.o
ar -csru libbwa.a utils.o kthread.o kstring.o ksw.o bwt.o bntseq.o bwa.o bwamem.o bwamem_pair.o bwamem_extra.o malloc_wrap.o QSufSort.o bwt_gen.o rope.o rle.o is.o bwtindex.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwashm.c -o bwashm.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwase.c -o bwase.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwaseqio.c -o bwaseqio.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtgap.c -o bwtgap.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtaln.c -o bwtaln.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bamlite.c -o bamlite.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwape.c -o bwape.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS kopen.c -o kopen.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS pemerge.c -o pemerge.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS maxk.c -o maxk.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtsw2_core.c -o bwtsw2_core.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtsw2_main.c -o bwtsw2_main.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtsw2_aux.c -o bwtsw2_aux.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwt_lite.c -o bwt_lite.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtsw2_chain.c -o bwtsw2_chain.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS fastmap.c -o fastmap.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS bwtsw2_pair.c -o bwtsw2_pair.o
gcc -c -g -Wall -Wno-unused-function -O2 -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS main.c -o main.o
gcc -g -Wall -Wno-unused-function -O2 bwashm.o bwase.o bwaseqio.o bwtgap.o bwtaln.o bamlite.o bwape.o kopen.o pemerge.o maxk.o bwtsw2_core.o bwtsw2_main.o bwtsw2_aux.o bwt_lite.o bwtsw2_chain.o fastmap.o bwtsw2_pair.o main.o -o bwa -L. -lbwa -lm -lz -lpthread -lrt