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Nginx make error,error: ignoring return value of ‘ftruncate’ #251

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Vancasola opened this issue Jul 17, 2018 · 4 comments
Closed

Nginx make error,error: ignoring return value of ‘ftruncate’ #251

Vancasola opened this issue Jul 17, 2018 · 4 comments

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@Vancasola
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Hello there.
The compiling environment is Ubuntu

uname -r:4.13.0-45-generic
cc -v:gcc version 5.4.0

DPDK and F-stack can be made successfully, but Nginx can't be made, I don't know whether the confgure's output is right or not,I have installed pcre, zlib,openssl before I made nginx, and I just followed the Quick Start.

error hints are shown below:

 bash ./configure --prefix=/usr/local/nginx_fstack --with-ff_module
checking for OS
 + Linux 4.13.0-45-generic x86_64
checking for C compiler ... found
 + using GNU C compiler
 + gcc version: 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 
checking for gcc -pipe switch ... found
checking for -Wl,-E switch ... found
checking for gcc builtin atomic operations ... found
checking for C99 variadic macros ... found
checking for gcc variadic macros ... found
checking for gcc builtin 64 bit byteswap ... found
checking for unistd.h ... found
checking for inttypes.h ... found
checking for limits.h ... found
checking for sys/filio.h ... not found
checking for sys/param.h ... found
checking for sys/mount.h ... found
checking for sys/statvfs.h ... found
checking for crypt.h ... found
checking for Linux specific features
checking for epoll ... found
checking for EPOLLRDHUP ... found
checking for O_PATH ... found
checking for sendfile() ... found
checking for sendfile64() ... found
checking for sys/prctl.h ... found
checking for prctl(PR_SET_DUMPABLE) ... found
checking for sched_setaffinity() ... found
checking for crypt_r() ... found
checking for sys/vfs.h ... found
checking for nobody group ... not found
checking for nogroup group ... found
checking for poll() ... found
checking for /dev/poll ... not found
checking for kqueue ... not found
checking for crypt() ... not found
checking for crypt() in libcrypt ... found
checking for F_READAHEAD ... not found
checking for posix_fadvise() ... found
checking for O_DIRECT ... found
checking for F_NOCACHE ... not found
checking for directio() ... not found
checking for statfs() ... found
checking for statvfs() ... found
checking for dlopen() ... not found
checking for dlopen() in libdl ... found
checking for sched_yield() ... found
checking for SO_SETFIB ... not found
checking for SO_REUSEPORT ... found
checking for SO_ACCEPTFILTER ... not found
checking for SO_BINDANY ... not found
checking for IP_BIND_ADDRESS_NO_PORT ... found
checking for IP_TRANSPARENT ... found
checking for IP_BINDANY ... not found
checking for IP_RECVDSTADDR ... not found
checking for IP_PKTINFO ... found
checking for IPV6_RECVPKTINFO ... found
checking for TCP_DEFER_ACCEPT ... found
checking for TCP_KEEPIDLE ... found
checking for TCP_FASTOPEN ... found
checking for TCP_INFO ... found
checking for eventfd() ... found
checking for int size ... 4 bytes
checking for long size ... 8 bytes
checking for long long size ... 8 bytes
checking for void * size ... 8 bytes
checking for uint32_t ... found
checking for uint64_t ... found
checking for sig_atomic_t ... found
checking for sig_atomic_t size ... 4 bytes
checking for socklen_t ... found
checking for in_addr_t ... found
checking for in_port_t ... found
checking for rlim_t ... found
checking for uintptr_t ... uintptr_t found
checking for system byte ordering ... little endian
checking for size_t size ... 8 bytes
checking for off_t size ... 8 bytes
checking for time_t size ... 8 bytes
checking for AF_INET6 ... found
checking for setproctitle() ... not found
checking for pread() ... found
checking for pwrite() ... found
checking for pwritev() ... found
checking for sys_nerr ... found
checking for localtime_r() ... found
checking for posix_memalign() ... found
checking for memalign() ... found
checking for mmap(MAP_ANON|MAP_SHARED) ... found
checking for mmap("/dev/zero", MAP_SHARED) ... found
checking for System V shared memory ... found
checking for POSIX semaphores ... not found
checking for POSIX semaphores in libpthread ... found
checking for struct msghdr.msg_control ... found
checking for ioctl(FIONBIO) ... found
checking for struct tm.tm_gmtoff ... found
checking for struct dirent.d_namlen ... not found
checking for struct dirent.d_type ... found
checking for sysconf(_SC_NPROCESSORS_ONLN) ... found
checking for openat(), fstatat() ... found
checking for getaddrinfo() ... found
checking for PCRE library ... found
checking for PCRE JIT support ... found
checking for zlib library ... found
creating objs/Makefile

Configuration summary
  + using system PCRE library
  + OpenSSL library is not used
  + using system zlib library

  nginx path prefix: "/usr/local/nginx_fstack"
  nginx binary file: "/usr/local/nginx_fstack/sbin/nginx"
  nginx modules path: "/usr/local/nginx_fstack/modules"
  nginx configuration prefix: "/usr/local/nginx_fstack/conf"
  nginx configuration file: "/usr/local/nginx_fstack/conf/nginx.conf"
  nginx pid file: "/usr/local/nginx_fstack/logs/nginx.pid"
  nginx error log file: "/usr/local/nginx_fstack/logs/error.log"
  nginx http access log file: "/usr/local/nginx_fstack/logs/access.log"
  nginx http client request body temporary files: "client_body_temp"
  nginx http proxy temporary files: "proxy_temp"
  nginx http fastcgi temporary files: "fastcgi_temp"
  nginx http uwsgi temporary files: "uwsgi_temp"
  nginx http scgi temporary files: "scgi_temp"

And I make nginx

make
make -f objs/Makefile
make[1]: Entering directory '/home/sdn/f-stack/app/nginx-1.11.10'
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/nginx.o \
	src/core/nginx.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_log.o \
	src/core/ngx_log.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_palloc.o \
	src/core/ngx_palloc.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_array.o \
	src/core/ngx_array.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_list.o \
	src/core/ngx_list.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_hash.o \
	src/core/ngx_hash.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_buf.o \
	src/core/ngx_buf.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_queue.o \
	src/core/ngx_queue.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_output_chain.o \
	src/core/ngx_output_chain.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_string.o \
	src/core/ngx_string.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_parse.o \
	src/core/ngx_parse.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_parse_time.o \
	src/core/ngx_parse_time.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_inet.o \
	src/core/ngx_inet.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_file.o \
	src/core/ngx_file.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_crc32.o \
	src/core/ngx_crc32.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_murmurhash.o \
	src/core/ngx_murmurhash.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_md5.o \
	src/core/ngx_md5.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_sha1.o \
	src/core/ngx_sha1.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_rbtree.o \
	src/core/ngx_rbtree.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_radix_tree.o \
	src/core/ngx_radix_tree.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_slab.o \
	src/core/ngx_slab.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_times.o \
	src/core/ngx_times.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_shmtx.o \
	src/core/ngx_shmtx.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_connection.o \
	src/core/ngx_connection.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_cycle.o \
	src/core/ngx_cycle.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_spinlock.o \
	src/core/ngx_spinlock.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_rwlock.o \
	src/core/ngx_rwlock.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_cpuinfo.o \
	src/core/ngx_cpuinfo.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_conf_file.o \
	src/core/ngx_conf_file.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_module.o \
	src/core/ngx_module.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_resolver.o \
	src/core/ngx_resolver.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_open_file_cache.o \
	src/core/ngx_open_file_cache.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_crypt.o \
	src/core/ngx_crypt.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_proxy_protocol.o \
	src/core/ngx_proxy_protocol.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/core/ngx_syslog.o \
	src/core/ngx_syslog.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/event/ngx_event.o \
	src/event/ngx_event.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/event/ngx_event_timer.o \
	src/event/ngx_event_timer.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/event/ngx_event_posted.o \
	src/event/ngx_event_posted.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/event/ngx_event_accept.o \
	src/event/ngx_event_accept.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/event/ngx_event_connect.o \
	src/event/ngx_event_connect.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/event/ngx_event_pipe.o \
	src/event/ngx_event_pipe.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_time.o \
	src/os/unix/ngx_time.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_errno.o \
	src/os/unix/ngx_errno.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_alloc.o \
	src/os/unix/ngx_alloc.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_files.o \
	src/os/unix/ngx_files.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_socket.o \
	src/os/unix/ngx_socket.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_recv.o \
	src/os/unix/ngx_recv.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_readv_chain.o \
	src/os/unix/ngx_readv_chain.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_udp_recv.o \
	src/os/unix/ngx_udp_recv.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_send.o \
	src/os/unix/ngx_send.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_writev_chain.o \
	src/os/unix/ngx_writev_chain.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_udp_send.o \
	src/os/unix/ngx_udp_send.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_udp_sendmsg_chain.o \
	src/os/unix/ngx_udp_sendmsg_chain.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_channel.o \
	src/os/unix/ngx_channel.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_shmem.o \
	src/os/unix/ngx_shmem.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_process.o \
	src/os/unix/ngx_process.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_daemon.o \
	src/os/unix/ngx_daemon.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_setaffinity.o \
	src/os/unix/ngx_setaffinity.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_setproctitle.o \
	src/os/unix/ngx_setproctitle.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_posix_init.o \
	src/os/unix/ngx_posix_init.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_user.o \
	src/os/unix/ngx_user.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_dlopen.o \
	src/os/unix/ngx_dlopen.c
cc -c -pipe  -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I/home/sdn/f-stack//lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
	-o objs/src/os/unix/ngx_process_cycle.o \
	src/os/unix/ngx_process_cycle.c
src/os/unix/ngx_process_cycle.c: In function ‘ngx_start_worker_processes’:
src/os/unix/ngx_process_cycle.c:388:5: error: ignoring return value of ‘ftruncate’, declared with attribute warn_unused_result [-Werror=unused-result]
     (void) ftruncate(shm_fd, sizeof(sem_t));
     ^
cc1: all warnings being treated as errors
objs/Makefile:799: recipe for target 'objs/src/os/unix/ngx_process_cycle.o' failed
make[1]: *** [objs/src/os/unix/ngx_process_cycle.o] Error 1
make[1]: Leaving directory '/home/sdn/f-stack/app/nginx-1.11.10'
Makefile:8: recipe for target 'build' failed
make: *** [build] Error 2

What should I do to solve the problem?
Thank you very much!!
@leowangxf
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I get the same error, I make it on Ubuntu 16, kernel 4.4, gcc 5.3.1.

root@ubn01:/data/f-stack/app/nginx-1.11.10# make
make -f objs/Makefile
make[1]: Entering directory '/data/f-stack/app/nginx-1.11.10'
cc -c -pipe -Os -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g -I/data/f-stack/lib -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs
-o objs/src/os/unix/ngx_process_cycle.o
src/os/unix/ngx_process_cycle.c
src/os/unix/ngx_process_cycle.c: In function ‘ngx_start_worker_processes’:
src/os/unix/ngx_process_cycle.c:388:5: error: ignoring return value of ‘ftruncate’, declared with attribute warn_unused_result [-Werror=unused-result]
(void) ftruncate(shm_fd, sizeof(sem_t));
^
cc1: all warnings being treated as errors
objs/Makefile:799: recipe for target 'objs/src/os/unix/ngx_process_cycle.o' failed
make[1]: *** [objs/src/os/unix/ngx_process_cycle.o] Error 1
make[1]: Leaving directory '/data/f-stack/app/nginx-1.11.10'
Makefile:8: recipe for target 'build' failed
make: *** [build] Error 2

@jfb8856606
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Contributor

Use this to configure nginx now, and we will fix the compile error.
./configure --prefix=/usr/local/nginx_fstack --with-ff_module --with-cc-opt="-Wno-implicit-fallthrough -Wno-unused-result"

@leowangxf
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it work. make & make install and then run successfully. thanks.

@Vancasola
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Author

Thanks very much! It works.

jfb8856606 added a commit that referenced this issue Jul 23, 2018
@jfb8856606
Fix #251:Compiling errors on Ubuntu.
63d2acf 
On Ubuntu 16.04/18.04, fixed compile error with -Wunused-result
and -Wimplicit-fallthrough.
jfb8856606 added a commit that referenced this issue Jun 25, 2019
@jfb8856606
Fix #251:Compiling errors on Ubuntu.
efb6796 
On Ubuntu 16.04/18.04, fixed compile error with -Wunused-result
and -Wimplicit-fallthrough.
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@jfb8856606 @leowangxf @Vancasola