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7 Commits
Author SHA1 Message Date
Kirill Smelkov 9775aea1ab Merge branch 'kirr/tcc-MD' into mob
Hello up there.

I'm trying to change gcc to tcc for faster develpment on slow machines,
and the first obstacle that turned out was lack of dependency generation
on tcc side.

Attached patches try to fix that.

Thanks,
Kirill

* tcc-MD:
  .gitignore += tags
  tcc: Explicitly require -l<lib> for libraries
  Document what tcc_fileextension does
  tcc -E: Let output_default be <file>.o instead of a.out
  tcc: Draft suppoprt for -MD/-MF options
  tcc: Refactor "compute default outfile name" into libtcc function
  Add input files/libs and reloc_output switch to TCCState
  tcc: Fix typo in error (it's '%s', not '%s)
  chmod a-x i386-gen.c
  .gitignore += *.o *.a
  .cvsignore -> .gitignore
2010-06-21 20:50:41 +04:00
Kirill Smelkov 2fe5210a33 .gitignore += tags 2010-06-21 20:49:46 +04:00
Kirill Smelkov 93de8d8038 tcc: Explicitly require -l<lib> for libraries
Previously it was possible to specify e.g. -q<lib> and still link with
lib. Avoid such behaviour by checking for '-l' instead of '-l.'
2010-06-21 20:49:46 +04:00
Kirill Smelkov 441a089aa4 Document what tcc_fileextension does
This is evident, but won't hurt
2010-06-21 20:49:46 +04:00
Kirill Smelkov 1203348302 tcc -E: Let output_default be <file>.o instead of a.out
This affectes where `tcc -E -MD file.c` will place generated dependency
information -- previously, for `tcc -E` output_default was a.out, and so
deps were put into a.d .

Avoid this behaviour, by treating `tcc -E` as `tcc -c` with respect to
output_default computation.

This will not hurt anything else (preprocessor outputs to either stdout,
or to explicitely given (-o <file>) destination, so no default filename
is used here), and on the other hand `tcc -E -MD file.c` now puts
dependencies into file.d (the same behaviour as for gcc -E).

v2:

- restructured condition a bit to make it more clear
2010-06-21 20:49:46 +04:00
Kirill Smelkov 0c928da96d tcc: Draft suppoprt for -MD/-MF options
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", ...)
2010-06-21 20:49:02 +04:00
Kirill Smelkov a919a373da Add input files/libs and reloc_output switch to TCCState
files[0], and reloc_outpu will be needed for (upcoming in the next
patch) "compute default outfile name" refactored into libtcc function.

Also, since for symmetry and from libification point of view, it makes
some sense to also put all information about what was given as input to
compilation into TCCState, let's not only put files[0], but all
files and all libraries given explicitely by user.

One point: I've used bitfield for reloc_output & trimmed down
output_type to 8 bits so that TCCState stays the same in size, and also
access to output_type is (hopefully) is not slower.

By the way -- as of today, sizeof(TCCState) on i686-pc-linux-gnu is 2884
bytes...
2010-06-20 20:30:01 +04:00