kolibrios/programs/develop/ktcc/trunk/source/readme_kos32.txt

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Siemargl port comments
Used github branch https://github.com/TinyCC/tinycc
It have a vesion 0.9.26 with heads up to 0.9.27 - see ChangeLog
Kolibri version errata/changelog:
-added TCC_TARGET_MEOS as needed
-leading_underscore by default is 0 (can use -f[no-]leading-underscore),
otherwise (error) underscoring all symbols, not only cdecl
-added message in tccmeos.c about missed symbols when linking KOS executable
-start.o added automatically, when -nostdlib not used
-to use standard ktcc lib must add -lck at commandline
-default search paths are ./include ./lib from executable (under KOS need to
use -Bpath_to_ktcc and put start.o in current dir)
-when config.h is ready, compiler can be easy builded as [kos32-]gcc tcc.c libtcc.c
see also makefile.kos32
-silent (kos) -> writes to debugboard
-impossible using with mingw-gcc compiled lib, incompatible library format:
.o is PE-format from gcc but ELF from tcc, may be linux-gcc does it ok
-__fastcall incompatible with other compilers. now stack freed by caller.
must fix i386-gen.c@490,572 (fixed in other branch https://github.com/mirror/tinycc)
-using __attribute__((packed)) see test82. need naming struct twice as in kos32sys1.h
-using __attribute__ ((alias xxx)) restricted only for non "static inline" functions
-erroneous or "non TCC" member using in nested structs or unions can lead to compiler internal error
-not working: default search path are ./include ./lib from executable
--under KOS need to use -Bpath_to_ktcc
--start.o not found using -B (kos) - put near your.c file
-bench timing coarse (0s or 1s), no usec in newlib gettimeofday. OK
Tests status:
asmtest +
abitest not tested (embedding compiler)
libtcctest not tested (embedding compiler)
boundtest ----- alloca removed from tcc libtcc.c:945 (really not worked)
tcctest most test ok, some problems with long double
vla_test.c +
pp/* + (minor comment error in 13.s)
tests2/* : see below
// errata
skippin' tests
test76 fail dollars in identifiers
test34 fail (array assignment not supported)
test73 fail compile (no stdint.h), printfloat, ARM specific
test46 no stdin - removed funtionality read from console, but file ops works
libc:
-no "finished" in title of console program after exit console - use con_exit()
-used system memory allocator (4096 bytes minimum)
libc not complete. overall status:
no files:
errno.h - in stdio
limits.h
locale.h
setjmp.h
signall.h
time.h - can use get_tick_count()/100 from kos32sys1.h
wchar.h
wctype.h
functions absent list:
math.h
frexp
ldexp
modf
fmod
HUGE_VAL
stdio.h:
remove
rename
tmpfile
tmpnam
freopen
setbuf
setvbuf
stdlib.h:
atexit
getenv
system
bsearch
qsort
mblen
mbtowc
wctomb
mbstowcs
wcstombs
string.h
strxfrm
Status or libc tests
---FAILED---
strtoul incorrect work with big unsigned > MAX_LONG
---NOT TESTED---
no library fns realized
qsort
time
---HANG---
sscanf
>TEST_F(0x1234p56) - no %a formats
---STACK IS SMALL---
use new -stack=1280000 option to pass test
tstring
strtodlong
--other--
fscanf
-?scanf ignores width specs, '*' and [chars], cant read %a float
-%n counts as parameter
snprintf
-some format misturbances
-may incorrect prints unsigned > 2147483647L
ungetc
-ungetc fails if filepos == 0 - no tricks
all file ops limited to 2Gb