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#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
/* goal:
* when invoked as
* "diet gcc -c t.c"
* exec
* "gcc -I/path/to/dietlibc/include -c t.c"
*
* when invoked as
* "diet sparc-linux-gcc -o t t.o"
* exec
* "sparc-linux-gcc -nostdlib -static -o t t.o /path/to/dietlibc/bin-sparc/start.o /path/to/dietlibc/bin-sparc/dietlibc.a"
*/
void error(const char *message) {
write(2,message,strlen(message));
exit(1);
}
int main(int argc,char *argv[]) {
int link=0;
int compile=0;
char diethome[]=DIETHOME;
char platform[1000]=DIETHOME "/bin-";
char *nostdlib="-nostdlib";
char *libgcc="-lgcc";
char dashL[1000]="-L";
int i;
if (argc<2) {
error("usage: diet [gcc command line]\n"
"e.g. diet gcc -c t.c\n"
"or diet sparc-linux-gcc -o foo foo.c bar.o\n");
}
{
char *tmp=strchr(argv[1],0)-2;
char *tmp2;
char *cc=argv[1];
if (tmp<cc) goto donttouch;
if ((tmp2=strchr(cc,'-'))) { /* cross compiling? */
int len=strlen(platform);
if (tmp2-cc>90) error("platform name too long!\n");
memmove(platform+len,argv[1],tmp2-cc);
platform[tmp2-cc+len]=0;
/* printf("found platform %s\n",platform); */
} else {
#ifdef __sparc__
strcat(platform,"sparc");
#endif
#ifdef __ppc__
strcat(platform,"ppc");
#endif
#ifdef __i386__
strcat(platform,"i386");
#endif
#ifdef __alpha__
strcat(platform,"alpha");
#endif
#ifdef __arm__
strcat(platform,"arm");
#endif
#ifdef __mips__
strcat(platform,"mips");
#endif
}
strcat(dashL,platform);
if (!strcmp(tmp,"cc")) {
char **newargv;
char **dest;
char *a,*b,*c;
/* we need to add -I... if the command line contains -c, -S or -E */
for (i=2; i<argc; ++i)
if (!strcmp(argv[i],"-c") || !strcmp(argv[i],"-S") || !strcmp(argv[i],"-E"))
compile=1;
/* we need to add -nostdlib if we are not compiling*/
link=!compile;
#if 0
for (i=2; i<argc; ++i)
if (!strcmp(argv[i],"-o"))
if (!compile) link=1;
#endif
newargv=alloca(sizeof(char*)*(argc+6));
a=alloca(strlen(diethome)+20);
b=alloca(strlen(platform)+20);
c=alloca(strlen(platform)+20);
strcpy(a,"-I"); strcat(a,diethome); strcat(a,"/include");
strcpy(b,platform); strcat(b,"/start.o");
strcpy(c,platform); strcat(c,"/dietlibc.a");
dest=newargv;
*dest++=argv[1];
if (link) { *dest++=nostdlib; *dest++=dashL; }
if (compile || link) *dest++=a;
for (i=2; i<argc; ++i)
*dest++=argv[i];
if (link) { *dest++=b; *dest++=c; *dest++=libgcc; }
*dest=0;
execvp(newargv[0],newargv);
goto error;
} else if (!strcmp(tmp,"ld")) {
}
}
donttouch:
execvp(argv[1],argv+1);
error:
error("execvp failed!\n");
return 1;
}
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