Build issue: truncated files

[kiefernforst]

When trying to build git master I'm getting:

[..]
/usr/bin/ld: cannot find -lpar: No such file or directory
[..]
ar: ./SeisUnix-master/lib/libcwp.a: error reading hilbert.o: file truncated
ar: ./SeisUnix-master/lib/libcwp.a: error reading hartley.o: file truncated

When using cwp_su_all_44R28.tgz the above errors vanish, but this remains:

gcc -I./seismic-unix/src/include -O2  -std=c99 -Wall -pedantic -Wno-long-long -ltirpc -no-pie -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -DCWP_LITTLE_ENDIAN -DSUXDR  -D_DEFAULT_SOURCE -D_POSIX_SOURCE rayt2dtopo.c  -L./seismic-unix/src/lib -lpar -lcwp -lm -no-pie -o ./seismic-unix/src/bin/rayt2dtopo
rayt2dtopo.c:180:1: error: return type defaults to 'int' [-Wimplicit-int]
  180 | main(int argc, char **argv)
      | ^~~~