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Allow conditional inclusion of builtin library functions.

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Mike Pall 2012-09-24 16:55:10 +02:00
parent 2ba16862c7
commit 2ff4afeb4f
1 changed files with 21 additions and 0 deletions
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21
src/host/buildvm_lib.c
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@ -317,6 +317,27 @@ void emit_lib(BuildCtx *ctx)
regfunc = REGFUNC_OK; regfunc = REGFUNC_OK;
while (fgets(buf, sizeof(buf), fp) != NULL) { while (fgets(buf, sizeof(buf), fp) != NULL) {
char *p; char *p;
/* Simplistic pre-processor. Only handles top-level #if/#endif. */
if (buf[0] == '#' && buf[1] == 'i' && buf[2] == 'f') {
int ok = 1;
if (!strcmp(buf, "#if LJ_52\n"))
ok = LJ_52;
else if (!strcmp(buf, "#if LJ_HASJIT\n"))
ok = LJ_HASJIT;
else if (!strcmp(buf, "#if LJ_HASFFI\n"))
ok = LJ_HASFFI;
if (!ok) {
int lvl = 1;
while (fgets(buf, sizeof(buf), fp) != NULL) {
if (buf[0] == '#' && buf[1] == 'e' && buf[2] == 'n') {
if (--lvl == 0) break;
} else if (buf[0] == '#' && buf[1] == 'i' && buf[2] == 'f') {
lvl++;
}
}
continue;
}
}
for (p = buf; (p = strstr(p, LIBDEF_PREFIX)) != NULL; ) { for (p = buf; (p = strstr(p, LIBDEF_PREFIX)) != NULL; ) {
const LibDefHandler *ldh; const LibDefHandler *ldh;
p += sizeof(LIBDEF_PREFIX)-1; p += sizeof(LIBDEF_PREFIX)-1;