Hi, fans.

I'm trying to port LibreSSL on native Plan 9.

Some functions are works now:

    1. git clone https://github.com/lufia/portable && cd portable

    2. rc ./update.rc

    3. ape/patch -p0 <plan9/crypto.patch

    4. ape/patch -p0 <plan9/ssl.patch

    5. ape/patch -p0 <plan9/apps.patch

    6. for(i in crypto ssl apps/openssl) @{ cd $i; mk }

I have difficulty in porting header files.

Some headers of LibreSSL has #include_next GCC extended directive, but Plan 9's cpp can't process #include_next directive.

When cpp processes a header containing #include_next, it exits with "Unknown preprocessor control #include_next" error even if ignoring by #if and #endif.

    % cat <<! | cpp

    #if 0

    #include_next <u.h>

    #endif

    !

I had no choice but to rewrite #include_next like:

compat.h:

    #ifdef Plan9

    #define SYS_PATH(x) /sys/include/ape/x

    #else

    #define SYS_PATH(x) sys_##x

    #endif

    #define SYSINCLUDE(x) <SYS_PATH(x)>

string.h:

    #include SYSINCLUDE(string.h)

sys_string.h:

    #include_next <string.h>

This works but I think this way is not good because developer should manage two files.

Is there any good way?