Add 'nweb' as overlay bundle

[ivandavidov]

The nweb project is direct descendant of the original nweb HTTP server developed by Nigel Griffiths.

This HTTP server is so small, easy to compile and easy to use, that it is perfect candidate to become the first overlay bundle enabled by default in the build process since it has no external dependencies and its build process is simple and fast.

As minimum, this should become an overlay bundle. The entire source may be hosted as part of the MLL project since the original license is in the public domain and all other project references that I found either don't explicitly set license or they are in the public domain as well.

[ivandavidov]

The work has been implemented in PR #68.

[ivandavidov]

@bauen1 - there is a problem with the sysroot.specs feature that you implemented.

ivan@ubuntu:~/minimal/src/minimal_overlay$ ./overlay_build.sh nweb
Cleaning up the overlay work area. This may take a while...
Ready to continue with the overlay software.
0.01user 0.02system 0:00.06elapsed 59%CPU (0avgtext+0avgdata 2452maxresident)k
0inputs+0outputs (0major+783minor)pagefaults 0swaps
Building overlay bundle 'nweb'...
removing previous work area
+ gcc -specs=/home/ivan/minimal/src/work/sysroot.specs -static-libgcc -Wl,-nostdlib -Os -s -fno-stack-protector -fomit-frame-pointer -U_FORTIFY_SOURCE -Wl,-nostdlib /home/ivan/minimal/src/minimal_overlay/bundles/nweb/nweb23.c -o nweb
/usr/bin/ld: cannot find /lib/libc.so.6
/usr/bin/ld: cannot find /lib/libc_nonshared.a
/usr/bin/ld: cannot find /lib/ld-linux-x86-64.so.2
collect2: error: ld returned 1 exit status
+ set +x
nweb has been build.
install: cannot stat 'nweb': No such file or directory
nweb has been installed.
it will be autostarted on boot
0.26user 0.14system 0:00.46elapsed 86%CPU (0avgtext+0avgdata 23760maxresident)k
0inputs+88outputs (0major+6426minor)pagefaults 0swaps
ivan@ubuntu:~/minimal/src/minimal_overlay$ 

I believe the sysroot.specs feature was introduced in PR #74. Could you please take a look at the above issue? The host machine is Ubuntu 16.04, and the MLL features are:

• Kernel 4.12.4
• GNU C library 2.26
• BusyBox 1.27.1

[ivandavidov]

I have reverted the -specs change which caused the issue. The nweb bundle works fine. There is separate issue to track the GCC failure.