diff --git a/Makefile b/Makefile
index 45ce793..c31bd80 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
-CC=cc
-CFLAGS=-O3 -Wall -Wextra
+CC=gcc
+CFLAGS=-O3 -Wall -Wextra -Wno-unknown-pragmas
 LDFLAGS=
 LIBS=-lm -lpthread -lz
 ZOPFLI=zopfli/src/zopfli/
diff --git a/pigz.c b/pigz.c
index 622e226..743f24e 100644
--- a/pigz.c
+++ b/pigz.c
@@ -3574,6 +3574,9 @@ local char *justname(char *path) {
     return p == NULL ? path : p + 1;
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-result"
+
 // Copy file attributes, from -> to, as best we can. This is best effort, so no
 // errors are reported. The mode bits, including suid, sgid, and the sticky bit
 // are copied (if allowed), the owner's user id and group id are copied (again
@@ -3600,6 +3603,8 @@ local void copymeta(char *from, char *to) {
     (void)utimes(to, times);
 }
 
+#pragma GCC diagnostic pop
+
 // Set the access and modify times of fd to t.
 local void touch(char *path, time_t t) {
     struct timeval times[2];