build: remove pthreads references

Makefile

@@ -23,7 +23,7 @@ INSTALLDIR=$(INSTALL) -d
 CFLAGS=-g -D_GNU_SOURCE -Werror -Wall -Wstrict-prototypes -std=gnu99 \
 	-DAPK_VERSION=\"$(FULL_VERSION)\"
 LDFLAGS=-g
-LIBS=-lpthread
+LIBS=/usr/lib/libz.a
 
 ifeq ($(STATIC),yes)
 CFLAGS+=-fno-stack-protector

src/Makefile

@@ -32,7 +32,7 @@ ALL_OBJS = $(apk_OBJS)
 all: $(TARGETS)
 
 apk: $(apk_OBJS)
-	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS) /usr/lib/libz.a
+	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
 
 clean::
 	@rm -f $(TARGETS) $(ALL_OBJS)

src/package.c

@@ -17,7 +17,6 @@
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <pthread.h>
 #include <sys/wait.h>
 
 #include "apk_defines.h"