从零开始 Nginx 交叉编译

交叉编译工具链： arm-poky-linux-gnueabi-gcc 

./configure --prefix=/home/chad/Documents/nginx_cr  --with-cc=arm-poky-linux-gnueabi-gcc

出现如下的问题

root@ubuntu:/home/chad/Downloads/nginx-1.18.0# ./configure --prefix=/home/chad/Documents/nginx_cr  --with-cc=arm-poky-linux-gnueabi-gcc
checking for OS
 + Linux 4.15.0-101-generic x86_64
checking for C compiler ... not found

./configure: error: C compiler arm-poky-linux-gnueabi-gcc is not found

src/core/ngx_rwlock.c:125:2: error: #error ngx_atomic_cmp_set() is not defined!
 #error ngx_atomic_cmp_set() is not defined!
  ^
objs/Makefile:547: recipe for target 'objs/src/core/ngx_rwlock.o' failed
make[1]: *** [objs/src/core/ngx_rwlock.o] Error 1
make[1]: Leaving directory '/home/chad/Downloads/nginx-1.18.0'
Makefile:8: recipe for target 'build' failed
make: *** [build] Error 2

解决办法，在configure的时候加上--without-http_upstream_zone_module

src/os/unix/ngx_errno.c: In function 'ngx_strerror':
src/os/unix/ngx_errno.c:37:31: error: 'NGX_SYS_NERR' undeclared (first use in this function)
     msg = ((ngx_uint_t) err < NGX_SYS_NERR) ? &ngx_sys_errlist[err]:
                               ^
src/os/unix/ngx_errno.c:37:31: note: each undeclared identifier is reported only once for each function it appears in
src/os/unix/ngx_errno.c: In function 'ngx_strerror_init':
src/os/unix/ngx_errno.c:58:11: error: 'NGX_SYS_NERR' undeclared (first use in this function)
     len = NGX_SYS_NERR * sizeof(ngx_str_t);
           ^
objs/Makefile:664: recipe for target 'objs/src/os/unix/ngx_errno.o' failed
make[1]: *** [objs/src/os/unix/ngx_errno.o] Error 1
make[1]: Leaving directory '/home/chad/Downloads/nginx-1.18.0'
Makefile:8: recipe for target 'build' failed
make: *** [build] Error 2

出错的原因仍然是因为交叉编译程序无法本地运行，导致NGX_SYS_NERR宏没有赋值。解决办法，手动编辑 objs/ngx_auto_config.h，加上

#ifndef NGX_SYS_NERR
#define NGX_SYS_NERR  132
#endif