gold_benchmark: enable multiple threads in gold

Author: cirosantilli

linker/gold_benchmark/bench

@@ -6,6 +6,6 @@ rm -f "$output_file"
 echo nogold
 /usr/bin/time --append --format 'nogold:  wall=%es user=%Us system=%Ss %MkB' --output "$output_file" gcc $cflags               -o main *.o
 echo gold
-/usr/bin/time --append --format 'gold:    wall=%es user=%Us system=%Ss %MkB' --output "$output_file" gcc $cflags -fuse-ld=gold -o main *.o
+/usr/bin/time --append --format 'gold:    wall=%es user=%Us system=%Ss %MkB' --output "$output_file" gcc $cflags -fuse-ld=gold -Wl,--threads -Wl,--thread-count=`nproc` -o main *.o
 echo lld
 /usr/bin/time --append --format 'lld:     wall=%es user=%Us system=%Ss %MkB' --output "$output_file" gcc $cflags -fuse-ld=lld  -o main *.o

linker/gold_benchmark/clean

@@ -1,2 +1,3 @@
 #!/usr/bin/env bash
-echo *.c *.h *.o main | xargs rm -f
+./clean-build
+rm -f *.log

linker/gold_benchmark/clean-build

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+echo *.c *.h *.o main | xargs rm -f

linker/gold_benchmark/generate-objects

@@ -16,7 +16,7 @@ n_funcs="${3:-10}"
 cflags='-ggdb3 -O0 -std=c99 -Wall -Wextra -pedantic'
 
 # Cleanup previous generated files objects.
-./clean
+./clean-build
 
 echo "Generate i_*.c, ints.h and int_sum.h"
 rm -f ints.h