diff options
Diffstat (limited to 'miniany/cc.wg')
| -rw-r--r-- | miniany/cc.wg | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/miniany/cc.wg b/miniany/cc.wg index f09157a..2a0ad6d 100644 --- a/miniany/cc.wg +++ b/miniany/cc.wg @@ -29,16 +29,16 @@ WordGrinder dumpfile v3: this is a text file; diff me! .clipboard.margin: 0 .clipboard.viewmode: 1 .clipboard.wordcount: 6 -.documents.1.co: 9 -.documents.1.cp: 205 -.documents.1.cw: 21 +.documents.1.co: 7 +.documents.1.cp: 31 +.documents.1.cw: 25 .documents.1.margin: 0 .documents.1.name: "main" .documents.1.sticky_selection: false .documents.1.viewmode: 1 .documents.1.wordcount: 2863 .fileformat: 8 -.findtext: "Typedefs" +.findtext: "Note" .menu.accelerators.^@: "ZM" .menu.accelerators.^B: "SB" .menu.accelerators.BACKSPACE: "ZDPC" @@ -160,7 +160,7 @@ LB exit: terminate the process, return does not always work in all combination LB read/write: read from stdin linearly, write to stdout linearly, this is essentially a model using an input and an output tape. Those two functions must really exist. This basically eliminates the need for a file system which we might not have during early bootstrapping. P Similarly we simplify the C language to not use certain features which can cause trouble when bootstrapping: LB variable arguments: though simple in principle (just some pointers into the stack if you use a stack for function parameters), it is not typesafe. And the only example in practice it's really heavily used for is in printf-like functions. -LB preprocessor: it needs a filesystem, we take this outside of the compiler by feeding it an (eventually) concatenated list of *.c files. Note: in the hosted environemt we (and glibc) can use as many preprocessor features as they want, they just don't have to get visible in our code. +LB preprocessor: it needs a filesystem, we take this outside of the compiler by feeding it an (eventually) concatenated list of *.c files. Note: in the hosted environment we (and glibc) can use as many preprocessor features as they want, they just don't have to get visible in our code. LB two types: int and char, so we can interpret memory as words or as bytes. H2 Local version of C4 P The local version of C4 has the following adaoptions and extensions: @@ -179,7 +179,7 @@ LB converted printf to putstring/putint/putnl and some helper functions for LB removed all memory leaks LB de-POSIX-ified, no open/read/close, use getchar from stdin only (don't assume the existence of a file system), this also means we had to create sort of an old style tape-file with FS markers to separate the files piped to c4. P The reason for all those adaptions is to minimize the dependency on the host system and to be able to use libc-freestanding.c. -H3 Note: only too late I discovered that there was a C5 version of the same compiler, which would maybe have served better as a basis. +P Note: Only too late I discovered that there was a C5 version of the same compiler, which would maybe have served better as a basis. H2 Examples H3 Running on the host system using the hosts C compiler P Compiled in either hosted (host libc) or freestanding (our own libc, currently IA-32 Linux kernel only syscalls): |