[SOLVED] string.h:29:8: error: expected identifier

string.h:29:8: error: expected identifier

I'm trying to compile nginx with custom openssl »libressl« using this script: https://gist.github.com/Belphemur/3c022598919e6a1788fc

Everything works fine using libressl 2.1.1. Problem is that libressl 2.1.1 has some security issues, which have been resolved by newer releases.
However I can't get the build to work with libressl 2.1.2 or libressl 2.1.3 (latest version).

The issue I get:

..
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I src/core -I src/event -I src/event/modules -I src/os/unix -I /tmp/build/pcre-8.36 -I /tmp/build/libressl-2.1.2/.openssl/include -I objs \
        -o objs/src/core/nginx.o \
        src/core/nginx.c
In file included from /usr/include/string.h:635:0,
                 from /tmp/build/libressl-2.1.2/.openssl/include/string.h:6,
                 from src/os/unix/ngx_linux_config.h:27,
                 from src/core/ngx_config.h:26,
                 from src/core/nginx.c:8:
/tmp/build/libressl-2.1.2/.openssl/include/string.h:29:8: error: expected identifier or ‘(’ before ‘__extension__’
 char * strndup(const char *str, size_t maxlen);
        ^
make[1]: *** [objs/src/core/nginx.o] Error 1
make[1]: Leaving directory `/tmp/build/nginx-1.7.9'
make: *** [build] Error 2
All done.
..

What's the problem & how to resolve it?
Thanks for helping.

Solution

I'm the creator of the script you use to build Nginx with LibreSSL.

It is now corrected, the previous way to build and use libressl doesn't work with previous version of the script. (Simply copying all the include and stripping the lib)

The script now install libressl in a set directory and give it to nginx, this way, all the include not needed to use the library (like this string.h) is not part of the building process of nginx.