GCC Variadic Macros

本文详细介绍了GNU C预处理器中的变长宏特性,包括其语法、用法及实际应用案例。变长宏允许开发者定义接受可变数量参数的宏,为编写更加灵活和复用性强的代码提供了便利。

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[root@VM-24-11-opencloudos nginx-1.27.5]# ./configure --add-module=/usr/local/fastdfs-nginx-module checking for OS + Linux 6.6.47-12.oc9.x86_64 x86_64 checking for C compiler ... found + using GNU C compiler + gcc version: 12.3.1 20230912 (OpenCloudOS 12.3.1.3-1) (Tencent Compiler 12.3.1.3) 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 EPOLLEXCLUSIVE ... found checking for eventfd() ... 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 prctl(PR_SET_KEEPCAPS) ... found checking for capabilities ... found checking for crypt_r() ... found checking for sys/vfs.h ... found checking for BPF sockhash ... found checking for SO_COOKIE ... found checking for UDP_SEGMENT ... found checking for nobody 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() ... found checking for sched_yield() ... found checking for sched_setaffinity() ... 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_TRANSPARENT ... found checking for IP_BINDANY ... not found checking for IP_BIND_ADDRESS_NO_PORT ... found checking for IP_RECVDSTADDR ... not found checking for IP_SENDSRCADDR ... not found checking for IP_PKTINFO ... found checking for IPV6_RECVPKTINFO ... found checking for IP_MTU_DISCOVER ... found checking for IPV6_MTU_DISCOVER ... found checking for IP_DONTFRAG ... not found checking for IPV6_DONTFRAG ... found checking for TCP_DEFER_ACCEPT ... found checking for TCP_KEEPIDLE ... found checking for TCP_FASTOPEN ... found checking for TCP_INFO ... found checking for accept4() ... 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 strerrordesc_np() ... found checking for localtime_r() ... found checking for clock_gettime(CLOCK_MONOTONIC) ... 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 ... found checking for struct msghdr.msg_control ... found checking for ioctl(FIONBIO) ... found checking for ioctl(FIONREAD) ... 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 sysconf(_SC_LEVEL1_DCACHE_LINESIZE) ... found checking for openat(), fstatat() ... found checking for getaddrinfo() ... found configuring additional modules adding module in /usr/local/fastdfs-nginx-module ./configure: error: no /usr/local/fastdfs-nginx-module/config was found [root@VM-24-11-opencloudos nginx-1.27.5]# make make: *** No rule to make target 'build', needed by 'default'. Stop. [root@VM-24-11-opencloudos nginx-1.27.5]# make insatll make: *** No rule to make target 'insatll'. Stop.
06-06
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