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cosmopolitan/third_party/chibicc/README.cosmo

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Add chibicc This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
2020-12-05 20:20:41 +00:00
chibicc is the simplest/tiniest/hackable/readable c11 compiler in the
world that can build projects like python but goes 2x slower than gcc
with 2x the code size, because it doesn't optimize or color registers
although it can compile code at 5x the speed and could be even faster
which is great, considering it's a 220kb αcτµαlly pδrταblε εxεcµταblε
local enhancements
Enhance chibicc
2020-12-09 12:00:48 +00:00
- support dce
- support gnu asm
Add chibicc This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
2020-12-05 20:20:41 +00:00
- support __int128
Enhance chibicc
2020-12-09 12:00:48 +00:00
- support _Static_assert
Add chibicc This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
2020-12-05 20:20:41 +00:00
- support __vector_size__
Enhance chibicc
2020-12-09 12:00:48 +00:00
- support __builtin_add_overflow, etc.
- support __builtin_memcpy, strlen, strpbrk, etc.
Add chibicc This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
2020-12-05 20:20:41 +00:00
- support __builtin_constant_p, __builtin_likely, etc.
- support __builtin_isunordered, __builtin_islessgreater, etc.
- support __builtin_ctz, __builtin_bswap, __builtin_popcount, etc.
Enhance chibicc
2020-12-09 12:00:48 +00:00
- support __constructor__, __section__, __cold__, -ffunction-sections, etc.
- support building -x assembler-with-cpp a.k.a. .S files
- support profiling w/ -mcount / -mfentry / -mnop-mcount
Add chibicc This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
2020-12-05 20:20:41 +00:00
- improve error messages to trace macro expansions
- reduce #lines of generated assembly by a third
- reduce #bytes of generated binary by a third
local bug fixes
Enhance chibicc
2020-12-09 12:00:48 +00:00
- allow casted values to be lvalues
- permit parentheses around string-initializer
Add chibicc This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
2020-12-05 20:20:41 +00:00
- fix 64-bit bug in generated code for struct bitfields
Enhance chibicc
2020-12-09 12:00:48 +00:00
- fix bug where last statement in statement expression couldn't have label
- print_tokens (chibicc -E) now works in the case of adjacent string literals
Add chibicc This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
2020-12-05 20:20:41 +00:00
local changes
- use tabs in generated output
- generated code no longer assumes red zone
- emit .size directives for function definitions
- use fisttp long double conversions if built w/ -msse3