Nginx 1.24 building from source with pcre2 on Ubuntu leading to issues

[Umar Noor]

Ubuntu Version: Linux anadev001 6.5.0-15-generic #15~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Jan 12 18:54:30 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

make version: GNU Make 4.3
Nginx version: nginx-1.24.0.tar.gz
PCRE2 Version: pcre2-10.42.tar.gz
gcc version: gcc version 11.4.0

Getting the below compilation issues using the above configuration:

 make -f objs/Makefile
gcc -c -fPIC -I/home/umarsam/projectwork/nginx/../pcre/src/include -I/home/umarsam/projectwork/nginx/../zlib/prod/include -I/home/umarsam/projectwork/nginx/../gd/prod/include -I/home/umarsam/projectwork/nginx/../openssl/prod/include -I.  -I src/core -I src/event -I src/event/modules -I src/os/unix -I /home/umarsam/projectwork/nginx/../pcre/prod/include -I /home/umarsam/projectwork/nginx/../openssl/prod/include -I /home/umarsam/projectwork/nginx/../zlib/prod/include -I /home/umarsam/projectwork/gd/prod/include -I objs -I src/http -I src/http/modules -I src/http/v2 \
        -o objs/src/http/modules/ngx_http_rewrite_module.o \
        src/http/modules/ngx_http_rewrite_module.c
src/http/modules/ngx_http_rewrite_module.c: In function ‘ngx_http_rewrite’:
src/http/modules/ngx_http_rewrite_module.c:309:5: error: unknown type name ‘ngx_http_script_regex_code_t’; did you mean ‘ngx_http_script_file_code_t’?
  309 |     ngx_http_script_regex_code_t      *regex;
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |     ngx_http_script_file_code_t
src/http/modules/ngx_http_rewrite_module.c:310:5: error: unknown type name ‘ngx_http_script_regex_end_code_t’; did you mean ‘ngx_http_script_return_code_t’?
  310 |     ngx_http_script_regex_end_code_t  *regex_end;
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |     ngx_http_script_return_code_t
src/http/modules/ngx_http_rewrite_module.c:314:47: error: ‘ngx_http_script_regex_code_t’ undeclared (first use in this function); did you mean ‘ngx_http_script_file_code_t’?
  314 |                                        sizeof(ngx_http_script_regex_code_t));
      |                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                               ngx_http_script_file_code_t
src/http/modules/ngx_http_rewrite_module.c:314:47: note: each undeclared identifier is reported only once for each function it appears in
src/http/modules/ngx_http_rewrite_module.c:336:10: error: request for member ‘regex’ in something not a structure or union
  336 |     regex->regex = ngx_http_regex_compile(cf, &rc);
      |          ^~
src/http/modules/ngx_http_rewrite_module.c:336:20: warning: implicit declaration of function ‘ngx_http_regex_compile’; did you mean ‘ngx_regex_compile’? [-Wimplicit-function-declaration]
  336 |     regex->regex = ngx_http_regex_compile(cf, &rc);
      |                    ^~~~~~~~~~~~~~~~~~~~~~
      |                    ngx_regex_compile
src/http/modules/ngx_http_rewrite_module.c:337:14: error: request for member ‘regex’ in something not a structure or union
  337 |     if (regex->regex == NULL) {
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:341:10: error: request for member ‘code’ in something not a structure or union
  341 |     regex->code = ngx_http_script_regex_start_code;
      |          ^~
src/http/modules/ngx_http_rewrite_module.c:341:19: error: ‘ngx_http_script_regex_start_code’ undeclared (first use in this function); did you mean ‘ngx_http_script_start_code’?
  341 |     regex->code = ngx_http_script_regex_start_code;
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                   ngx_http_script_start_code
src/http/modules/ngx_http_rewrite_module.c:342:10: error: request for member ‘uri’ in something not a structure or union
  342 |     regex->uri = 1;
      |          ^~
src/http/modules/ngx_http_rewrite_module.c:343:10: error: request for member ‘name’ in something not a structure or union
  343 |     regex->name = value[1];
      |          ^~
src/http/modules/ngx_http_rewrite_module.c:351:14: error: request for member ‘add_args’ in something not a structure or union
  351 |         regex->add_args = 1;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:360:14: error: request for member ‘status’ in something not a structure or union
  360 |         regex->status = NGX_HTTP_MOVED_TEMPORARILY;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:361:14: error: request for member ‘redirect’ in something not a structure or union
  361 |         regex->redirect = 1;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:370:18: error: request for member ‘break_cycle’ in something not a structure or union
  370 |             regex->break_cycle = 1;
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:374:18: error: request for member ‘status’ in something not a structure or union
  374 |             regex->status = NGX_HTTP_MOVED_TEMPORARILY;
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:375:18: error: request for member ‘redirect’ in something not a structure or union
  375 |             regex->redirect = 1;
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:379:18: error: request for member ‘status’ in something not a structure or union
  379 |             regex->status = NGX_HTTP_MOVED_PERMANENTLY;
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:380:18: error: request for member ‘redirect’ in something not a structure or union
  380 |             regex->redirect = 1;
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:394:24: error: request for member ‘lengths’ in something not a structure or union
  394 |     sc.lengths = &regex->lengths;
      |                        ^~
src/http/modules/ngx_http_rewrite_module.c:399:29: error: request for member ‘redirect’ in something not a structure or union
  399 |     sc.compile_args = !regex->redirect;
      |                             ^~
src/http/modules/ngx_http_rewrite_module.c:407:10: error: request for member ‘size’ in something not a structure or union
  407 |     regex->size = sc.size;
      |          ^~
src/http/modules/ngx_http_rewrite_module.c:408:10: error: request for member ‘args’ in something not a structure or union
  408 |     regex->args = sc.args;
      |          ^~
src/http/modules/ngx_http_rewrite_module.c:411:14: error: request for member ‘lengths’ in something not a structure or union
  411 |         regex->lengths = NULL;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:415:46: error: ‘ngx_http_script_regex_end_code_t’ undeclared (first use in this function); did you mean ‘ngx_http_script_return_code_t’?
  415 |                                       sizeof(ngx_http_script_regex_end_code_t),
      |                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                              ngx_http_script_return_code_t
src/http/modules/ngx_http_rewrite_module.c:421:14: error: request for member ‘code’ in something not a structure or union
  421 |     regex_end->code = ngx_http_script_regex_end_code;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:421:23: error: ‘ngx_http_script_regex_end_code’ undeclared (first use in this function); did you mean ‘ngx_http_script_return_code’?
  421 |     regex_end->code = ngx_http_script_regex_end_code;
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       ngx_http_script_return_code
src/http/modules/ngx_http_rewrite_module.c:422:14: error: request for member ‘uri’ in something not a structure or union
  422 |     regex_end->uri = regex->uri;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:422:27: error: request for member ‘uri’ in something not a structure or union
  422 |     regex_end->uri = regex->uri;
      |                           ^~
src/http/modules/ngx_http_rewrite_module.c:423:14: error: request for member ‘args’ in something not a structure or union
  423 |     regex_end->args = regex->args;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:423:28: error: request for member ‘args’ in something not a structure or union
  423 |     regex_end->args = regex->args;
      |                            ^~
src/http/modules/ngx_http_rewrite_module.c:424:14: error: request for member ‘add_args’ in something not a structure or union
  424 |     regex_end->add_args = regex->add_args;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:424:32: error: request for member ‘add_args’ in something not a structure or union
  424 |     regex_end->add_args = regex->add_args;
      |                                ^~
src/http/modules/ngx_http_rewrite_module.c:425:14: error: request for member ‘redirect’ in something not a structure or union
  425 |     regex_end->redirect = regex->redirect;
      |              ^~
src/http/modules/ngx_http_rewrite_module.c:425:32: error: request for member ‘redirect’ in something not a structure or union
  425 |     regex_end->redirect = regex->redirect;
      |                                ^~
src/http/modules/ngx_http_rewrite_module.c:436:10: error: request for member ‘next’ in something not a structure or union
  436 |     regex->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
      |          ^~
src/http/modules/ngx_http_rewrite_module.c: In function ‘ngx_http_rewrite_if_condition’:
src/http/modules/ngx_http_rewrite_module.c:658:5: error: unknown type name ‘ngx_http_script_regex_code_t’; did you mean ‘ngx_http_script_file_code_t’?
  658 |     ngx_http_script_regex_code_t  *regex;
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |     ngx_http_script_file_code_t
src/http/modules/ngx_http_rewrite_module.c:756:49: error: ‘ngx_http_script_regex_code_t’ undeclared (first use in this function); did you mean ‘ngx_http_script_file_code_t’?
  756 |                                          sizeof(ngx_http_script_regex_code_t));
      |                                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                 ngx_http_script_file_code_t
src/http/modules/ngx_http_rewrite_module.c:770:18: error: request for member ‘regex’ in something not a structure or union
  770 |             regex->regex = ngx_http_regex_compile(cf, &rc);
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:771:22: error: request for member ‘regex’ in something not a structure or union
  771 |             if (regex->regex == NULL) {
      |                      ^~
src/http/modules/ngx_http_rewrite_module.c:775:18: error: request for member ‘code’ in something not a structure or union
  775 |             regex->code = ngx_http_script_regex_start_code;
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:775:27: error: ‘ngx_http_script_regex_start_code’ undeclared (first use in this function); did you mean ‘ngx_http_script_start_code’?
  775 |             regex->code = ngx_http_script_regex_start_code;
      |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                           ngx_http_script_start_code
src/http/modules/ngx_http_rewrite_module.c:776:18: error: request for member ‘next’ in something not a structure or union
  776 |             regex->next = sizeof(ngx_http_script_regex_code_t);
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:777:18: error: request for member ‘test’ in something not a structure or union
  777 |             regex->test = 1;
      |                  ^~
src/http/modules/ngx_http_rewrite_module.c:779:22: error: request for member ‘negative_test’ in something not a structure or union
  779 |                 regex->negative_test = 1;
      |                      ^~
src/http/modules/ngx_http_rewrite_module.c:781:18: error: request for member ‘name’ in something not a structure or union
  781 |             regex->name = value[last];
      |                  ^~

After having a look in the code the below 2 structures causing this are defined in teh directives with PCRE only and not with PCRE2

#if (NGX_PCRE)

typedef struct {
    ngx_http_script_code_pt     code;
    ngx_http_regex_t           *regex;
    ngx_array_t                *lengths;
    uintptr_t                   size;
    uintptr_t                   status;
    uintptr_t                   next;

    unsigned                    test:1;
    unsigned                    negative_test:1;
    unsigned                    uri:1;
    unsigned                    args:1;

    /* add the r->args to the new arguments */
    unsigned                    add_args:1;

    unsigned                    redirect:1;
    unsigned                    break_cycle:1;

    ngx_str_t                   name;
} ngx_http_script_regex_code_t;


typedef struct {
    ngx_http_script_code_pt     code;

    unsigned                    uri:1;
    unsigned                    args:1;

    /* add the r->args to the new arguments */
    unsigned                    add_args:1;

    unsigned                    redirect:1;
} ngx_http_script_regex_end_code_t;

#endif

Could you please let me know if this is the right way of compiling or niginx1.24 does not support PCRE2 library on Ubuntu....

[Maxim Dounin]

Compilation of nginx with PCRE2 is supported staring with nginx 1.21.5. And the NGX_PCRE macro is defined for both PCRE and PCRE2, see auto/lib/pcre/conf.

The gcc arguments as shown, notably -I/home/umarsam/projectwork/nginx/../pcre/src/include and -I /home/umarsam/projectwork/nginx/../pcre/prod/include, suggest you are doing something wrong with the configure arguments. Please show configure arguments you are using and configure output.