Consider using macros instead of -D to support "quick compiling" #544
Description
Hello!
Obviously, in it's current state, this fails quite badly:
Ingwie@Ingwies-Macbook-Pro.local ~/W/G/d/out $ gcc ../kernel/*.c -o dao
../kernel/daoPlatform.c:101:2: warning: implicit declaration of function 'gettimeofday' is invalid in C99 [-Wimplicit-function-declaration]
gettimeofday( & tv, NULL);
^
1 warning generated.
../kernel/daoVmspace.c:2848:8: warning: implicit declaration of function 'getcwd' is invalid in C99 [-Wimplicit-function-declaration]
cwd = getcwd( masterVmSpace->startPath->chars, 511 );
^
../kernel/daoVmspace.c:2848:6: warning: incompatible integer to pointer conversion assigning to 'char *' from 'int' [-Wint-conversion]
cwd = getcwd( masterVmSpace->startPath->chars, 511 );
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 warnings generated.
Ingwie@Ingwies-Macbook-Pro.local ~/W/G/d/out $ ./dao
fish: './dao' terminated by signal SIGSEGV (Address boundary error)
When using the (dao)makefiles, I see that only a few definitions are actually added, such as -DMACOSX or -DBSD and -DUNIX. This can, in fact, easily be deduced off a few #ifdef checks:
#ifdef __APPLE__
#define MACOSX
#define BSD
#define UNIX
#endifThere is a super comprehensive "feature detection" header here: https://github.com/msadeqhe/platform-id/blob/master/include/platform-id.h
You may be able to pick this up and modify it to automatically define DAO_-macros. This would make blind-compiles like my showcase above possible, simplify the bootstrap process a little and also allow for people with neither make nor any other means of building, to compile this language right away.
Kind regards,
Ingwie.