Build error on El Capitan

[dongz9]

Hi,

I met the following error message when building servo:

In file included from /usr/include/sys/types.h:121:
/usr/include/sys/_types/_pid_t.h:30:31: error: cannot combine with previous 'type-name' declaration specifier
typedef __darwin_pid_t        pid_t;
                              ^
./confdefs.h:16:15: note: expanded from macro 'pid_t'
#define pid_t int
              ^
4 errors generated.
configure: failed program was:
#line 12469 "configure"
#include "confdefs.h"
 #include <stdio.h>
                             #include <string.h>
                             #include <zlib.h>
int main() {
 #if ZLIB_VERNUM < 0x1230
                             #error "Insufficient zlib version (0x1230 required)."
                             #endif
; return 0; }
configure: error: Insufficient zlib version for --with-system-zlib (1.2.3 required)

Any idea how to fix it?

[KiChjang]

It looks like your version of zlib is outdated. Have you tried updating it?

[dongz9]

I've installed homebrew/dupes/zlib, which is 1.2.8. I guess the build system didn't find it? Is there anyway to configure which zlib to use?

[dongz9]

Umm, I checked OSX's default zlib version, which is 1.2.5.

#define ZLIB_VERSION "1.2.5"
#define ZLIB_VERNUM 0x1250
#define ZLIB_VER_MAJOR 1
#define ZLIB_VER_MINOR 2
#define ZLIB_VER_REVISION 5
#define ZLIB_VER_SUBREVISION 0

This makes me really confusing now...

[dongz9]

I just took a closer look, the solution turns out to set CPP=clang -E (the default value is gcc -E). Anyway, the original error message was really confusing...

[perlun]

Hmm, that's weird; I built Servo on El Capitan just a few days ago. Got a build error first (but a different one than this 😄) but after resolving that, it worked fine. I guess I could try rebuilding from latest master but it'll take some time.

[perlun]

Rebuilt here - worked fine, the resulting binary seems to work also.

dongz9 - could you include some more details from the build error? From what I can tell in the posted log, the error you're seeing is from some autoconf/configure script, likely a dependency coming from some create (I am yet too unfamiliar with the servo code base to be able to give more details than that...).

[andrewdavidmackenzie]

Just did the debug build (first attempt ever) and it all built fine with no errors and runs fine also.

[nox]

I cannot reproduce this.