Add build scripts of tinycc

[Yaxuan-w]

Resolves #91

Added build script required to compile tinycc for lind-wasm.

The compiled tinycc compiler can compile C programs to 32-bit ELF binaries (i386 target)

Since the target is i386, the dependent library libtcc.a is compiled using as a i386 shared folder using gcc. Also, in order to run tinycc, the following are required:

• C header files
• i386 compatible libc.so.6, ld.so, libc_nonshared.a, crt1.o

The above are also copied to the build/ folder and later copied to lindfs when make install-tinycc is run.

To run dynamically linked executables produced by tinycc, dynamic linker is used. Since the executable is run natively, we provide a symbolic link to the 32-bit dynamic linker within /lib of the root filesystem so that the kernel can locate the dynamic linker.

Steps to reproduce

cd lind-wasm-apps
make tinycc
make install-tinycc

[vidyalakshmir]

libtcc1.a is not statically compiled with tinycc and is copied to lib/ folder. This is a static build of tinycc right. In that case I suppose, you need to pass libtcc as a dependent library (ldflags) during compilation phase. Essentially we need to have compilation of libtcc1 under 'merge-sysroot' in the main Makefile of the app and the built library should be placed under sysroot_merged folder and have ldflags have syroot_merged folder in its arguments (-I) like this.

lind-wasm-apps/curl/compile_curl.sh

Line 73 in 39b15e4

LDFLAGS_WASM=(

@rennergade @qianxichen233 Could you pls confirm this?

[Yaxuan-w]

Sysroot is used by clang to compile wasm binary. libtcc1.a is not used by clang. It's used by tcc during compiling the native code, so it should be placed in lindfs not sysroot.

[vidyalakshmir]

@qianxichen233 @rennergade Could you please review this?

[Yaxuan-w]

Not required to "run tcc" but to compile correct native binary that can be run on native