Example you build nginx from source, you get the error:
src/stream/ngx_stream_script.c
src/stream/ngx_stream_script.c: In function ‘ngx_stream_script_add_copy_code’:
src/stream/ngx_stream_script.c:590:18: error: cast between incompatible function types from ‘size_t (*)(ngx_stream_script_engine_t *)’ {aka ‘long unsigned int (*)(struct <anonymous> *)’} to ‘void (*)(ngx_stream_script_engine_t *)’ {aka ‘void (*)(struct <anonymous> *)’} [-Werror=cast-function-type]
code->code = (ngx_stream_script_code_pt) ngx_stream_script_copy_len_code;
^
src/stream/ngx_stream_script.c: In function ‘ngx_stream_script_add_var_code’:
src/stream/ngx_stream_script.c:680:18: error: cast between incompatible function types from ‘size_t (*)(ngx_stream_script_engine_t *)’ {aka ‘long unsigned int (*)(struct <anonymous> *)’} to ‘void (*)(ngx_stream_script_engine_t *)’ {aka ‘void (*)(struct <anonymous> *)’} [-Werror=cast-function-type]
code->code = (ngx_stream_script_code_pt)
^
src/stream/ngx_stream_script.c: In function ‘ngx_stream_script_add_capture_code’:
src/stream/ngx_stream_script.c:770:18: error: cast between incompatible function types from ‘size_t (*)(ngx_stream_script_engine_t *)’ {aka ‘long unsigned int (*)(struct <anonymous> *)’} to ‘void (*)(ngx_stream_script_engine_t *)’ {aka ‘void (*)(struct <anonymous> *)’} [-Werror=cast-function-type]
code->code = (ngx_stream_script_code_pt)
^
src/stream/ngx_stream_script.c: In function ‘ngx_stream_script_add_full_name_code’:
src/stream/ngx_stream_script.c:862:18: error: cast between incompatible function types from ‘size_t (*)(ngx_stream_script_engine_t *)’ {aka ‘long unsigned int (*)(struct <anonymous> *)’} to ‘void (*)(ngx_stream_script_engine_t *)’ {aka ‘void (*)(struct <anonymous> *)’} [-Werror=cast-function-type]
code->code = (ngx_stream_script_code_pt)
^
cc1: all warnings being treated as errors
make[1]: *** [objs/Makefile:2326: objs/src/stream/ngx_stream_script.o] Error 1
make[1]: Leaving directory '/usr/local/src/nginx-1.14.1'
make: *** [Makefile:14: modules] Error 2
Solution: add CFLAGS=-Wno-error before ./configure. Eg:
CFLAGS=-Wno-error ./configure --with-ld-opt=-Wl,-rpath,/usr/local/lib --add-dynamic-module=../ngx_devel_kit-0.3.1 --add-dynamic-module=../lua-nginx-module-0.10.15 --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_addition_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_slice_module --with-http_stub_status_module --with-http_perl_module=dynamic --with-http_auth_request_module --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-debug --with-cc-opt='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E'
