libtool: compile:  /～/spack/lib/spack/env/fj/fcc -DHAVE_CONFIG_H -I. -I.. -I./ -I./compress -I./common -I./deprecated -I./dictBuilder -I./legacy -O3 -std=c99 -Wall -MT ./legacy/libzstd_la-zstd_v02.lo -MD -MP -MF ./legacy/.deps/libzstd_la-zstd_v02.Tpo -c ./legacy/zstd_v02.c  -fPIC -DPIC -o ./legacy/.libs/libzstd_la-zstd_v02.o

/～/lib64/libLLVMSupport.so.6(_ZN4ll
vm3sys15PrintStackTraceERNS_11raw_ostreamE+0x28)[0xffff9fd20888]
Stack dump:
0.      Program arguments: ～
1.      <eof> parser at end of file
2.      Per-module optimization passes
3.      Running pass 'CallGraph Pass Manager' on module './compress/zstd_opt.c'.
4.      Running pass 'Loop Pass Manager' on function '@ZSTD_compressBlock_opt_generic'
5.      Running pass 'Tree Height Reduction' on basic block '%7049'
libtool: compile:  /～/spack/lib/spack/env/fj/fcc -DHAVE_CONFIG_H -I. -I.. -I./ -I./compress -I./common -I./deprecated -I./dictBuilder -I./legacy -O3 -std=c99 -Wall -MT ./compress/libzstd_la-zstd_compress.lo -MD -MP -MF ./compress/.deps/libzstd_la-zstd_compress.Tpo -c ./compress/
zstd_compress.c -o ./compress/libzstd_la-zstd_compress.o >/dev/null 2>&1
...