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0c928da96d
In build systems, this is used to automatically collect target
dependencies, e.g.
---- 8< (hello.c) ----
#include "hello.h"
#include <stdio.h>
int main()
{
printf("Hello World!\n");
return 0;
}
$ tcc -MD -c hello.c # -> hello.o, hello.d
$ cat hello.d
hello.o : \
hello.c \
hello.h \
/usr/include/stdio.h \
/usr/include/features.h \
/usr/include/bits/predefs.h \
/usr/include/sys/cdefs.h \
/usr/include/bits/wordsize.h \
/usr/include/gnu/stubs.h \
/usr/include/bits/wordsize.h \
/usr/include/gnu/stubs-32.h \
/home/kirr/local/tcc/lib/tcc/include/stddef.h \
/usr/include/bits/types.h \
/usr/include/bits/wordsize.h \
/usr/include/bits/typesizes.h \
/usr/include/libio.h \
/usr/include/_G_config.h \
/usr/include/wchar.h \
/home/kirr/local/tcc/lib/tcc/include/stdarg.h \
/usr/include/bits/stdio_lim.h \
/usr/include/bits/sys_errlist.h \
NOTE: gcc supports -MD only for .c -> .o, but in tcc, we generate
dependencies for whatever action is being taken. E.g. for .c -> exe, the
result will be:
$ tcc -MD -o hello hello.c # -> hello, hello.d
hello: \
/usr/lib/crt1.o \
/usr/lib/crti.o \
hello.c \
hello.h \
/usr/include/stdio.h \
/usr/include/features.h \
/usr/include/bits/predefs.h \
/usr/include/sys/cdefs.h \
/usr/include/bits/wordsize.h \
/usr/include/gnu/stubs.h \
/usr/include/bits/wordsize.h \
/usr/include/gnu/stubs-32.h \
/home/kirr/local/tcc/lib/tcc/include/stddef.h \
/usr/include/bits/types.h \
/usr/include/bits/wordsize.h \
/usr/include/bits/typesizes.h \
/usr/include/libio.h \
/usr/include/_G_config.h \
/usr/include/wchar.h \
/home/kirr/local/tcc/lib/tcc/include/stdarg.h \
/usr/include/bits/stdio_lim.h \
/usr/include/bits/sys_errlist.h \
/usr/lib/libc.so \
/lib/libc.so.6 \
/usr/lib/ld-linux.so.2 \
/lib/ld-linux.so.2 \
/usr/lib/libc_nonshared.a \
/lib/libc.so.6 \
/usr/lib/libc_nonshared.a \
/home/kirr/local/tcc/lib/tcc/libtcc1.a \
/usr/lib/crtn.o \
So tcc dependency generator is a bit more clever than one used in gcc :)
Also, I've updated TODO and Changelog (in not-yet-released section).
v2:
(Taking inputs from grischka and me myself)
- put code to generate deps file into a function.
- used tcc_fileextension() instead of open-coding
- generate deps only when compilation/preprocessing was successful
v3:
- use pstrcpy instead of snprintf(buf, sizeof(buf), "%s", ...)
95 lines
3.3 KiB
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95 lines
3.3 KiB
Plaintext
TODO list:
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Bugs:
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- fix macro substitution with nested definitions (ShangHongzhang)
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- FPU st(0) is left unclean (kwisatz haderach). Incompatible with
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optimized gcc/msc code
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- constructors
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- cast bug (Peter Wang)
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- define incomplete type if defined several times (Peter Wang).
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- configure --cc=tcc (still one bug in libtcc1.c)
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- test binutils/gcc compile
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- tci patch + argument.
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- see -lxxx bug (Michael Charity).
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- see transparent union pb in /urs/include/sys/socket.h
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- precise behaviour of typeof with arrays ? (__put_user macro)
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but should suffice for most cases)
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- handle '? x, y : z' in unsized variable initialization (',' is
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considered incorrectly as separator in preparser)
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- transform functions to function pointers in function parameters
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(net/ipv4/ip_output.c)
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- fix function pointer type display
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- check lcc test suite -> fix bitfield binary operations
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- check section alignment in C
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- fix invalid cast in comparison 'if (v == (int8_t)v)'
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- finish varargs.h support (gcc 3.2 testsuite issue)
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- fix static functions declared inside block
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- fix multiple unions init
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- sizeof, alignof, typeof can still generate code in some cases.
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- Fix the remaining libtcc memory leaks.
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- make libtcc fully reentrant (except for the compilation stage itself).
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Bound checking:
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- '-b' bug.
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- fix bound exit on RedHat 7.3
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- setjmp is not supported properly in bound checking.
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- fix bound check code with '&' on local variables (currently done
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only for local arrays).
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- bound checking and float/long long/struct copy code. bound
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checking and symbol + offset optimization
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Missing features:
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- disable-asm and disable-bcheck options
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- __builtin_expect()
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- improve '-E' option.
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- atexit (Nigel Horne)
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- packed attribute
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- C99: add variable size arrays (gcc 3.2 testsuite issue)
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- C99: add complex types (gcc 3.2 testsuite issue)
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- postfix compound literals (see 20010124-1.c)
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Optimizations:
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- suppress specific anonymous symbol handling
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- more parse optimizations (=even faster compilation)
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- memory alloc optimizations (=even faster compilation)
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- optimize VT_LOCAL + const
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- better local variables handling (needed for other targets)
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Not critical:
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- C99: fix multiple compound literals inits in blocks (ISOC99
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normative example - only relevant when using gotos! -> must add
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boolean variable to tell if compound literal was already
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initialized).
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- add PowerPC or ARM code generator and improve codegen for RISC (need
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to suppress VT_LOCAL and use a base register instead).
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- interactive mode / integrated debugger
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- fix preprocessor symbol redefinition
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- better constant opt (&&, ||, ?:)
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- add portable byte code generator and interpreter for other
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unsupported architectures.
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- C++: variable declaration in for, minimal 'class' support.
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- win32: __intxx. use resolve for bchecked malloc et al.
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check exception code (exception filter func).
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- handle void (__attribute__() *ptr)()
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Fixed (probably):
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- bug with defines:
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#define spin_lock(lock) do { } while (0)
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#define wq_spin_lock spin_lock
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#define TEST() wq_spin_lock(a)
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- typedefs can be structure fields
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- see bugfixes.diff + improvement.diff from Daniel Glockner
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- long long constant evaluation
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- add alloca()
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- gcc '-E' option.
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- #include_next support for /usr/include/limits ?
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- function pointers/lvalues in ? : (linux kernel net/core/dev.c)
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- win32: add __stdcall, check GetModuleHandle for dlls.
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