The patches in this directory include some updates to tcc 0.9.25.
Some of them have been committed in the main tcc repository so
we will not need them in future updates.
In particular:
1. ELF file format (merged upstream)
tcc 0.9.25 produces an ELF executable which is good for linux but
not for FreeBSD. It misses the PHDR section which is almost
mandatory for shared executables, puts in the .dynsym section
some relocation info that FreeBSD expects to be in .got,
and expect the relocation sections to be contiguous.
patch-tccelf.c tries to address the above problem using
conditional sections (so hopefully can be imported upstream)
and also adds the ability to override the name of the dynamic
loader through an environment variable (this is important to
debug tcc).
The resulting elf file is still not 100% correct -- if you strip it,
the program will not run (presumably there is some dangling reference).
Other than that, program do seem to run correctly.
2. predefined macros (partially merged upstream)
patch-libtcc.c adds/fixes some predefined macros when compiling
on FreeBSD: these are __FreeBSD__ and the usual set of
__i386__ and __unix__ variants.
It also #defines __builtin_inline(x,y), __PRETTY_FUNCTION__,
__CC_SUPPORTS___INLINE, __aligned(x), __packed that are used
in cdefs.h and by several user programs.
Note that tcc recognises the __aligned__ and __packed__
attributes but does not honor them.
3. -include, -M and other preprocessor directives
patch-z1-preproc (name chosen because it must be applied after
the other two) implements -include, -M (and related options),
and makes tcc ignore -isystem and -std= which are often used
to build code.
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