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Implement code to generate Makefile to build netbsd via intermediate relocatable

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object files.  Disabled for now.  Commit this for further experiments.

Kernel (netbsd) has been built as:

	netbsd: *.o
		ld -o netbsd *.o

Change this to:

	netbsd: *.ko
		ld -o netbsd *.ko
	acpica.ko: ${OBJS.acpica}
		ld -r acpica.ko ${OBJS.acpica}
	:

You can call *.ko as a module, but this is not only beneficial for loadable
module, but also localize related text/data.  Various options/flags/params
will be able to be per-ko.  Unnecessary symbols can be hidden.  Many ideas
will follow.
This commit is contained in:
uebayasi 2014-10-09 17:00:15 +00:00
parent 7a4efc30db
commit ae77717cc7
1 changed files with 70 additions and 2 deletions
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72
usr.bin/config/mkmakefile.c
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@ -1,4 +1,4 @@
/* $NetBSD: mkmakefile.c,v 1.17 2014/08/18 08:07:02 joerg Exp $ */
/* $NetBSD: mkmakefile.c,v 1.18 2014/10/09 17:00:15 uebayasi Exp $ */
/*
* Copyright (c) 1992, 1993
@ -68,6 +68,11 @@ static void emitdefs(FILE *);
static void emitfiles(FILE *, int, int);
static void emitobjs(FILE *);
static void emitallkobjs(FILE *);
static int emitallkobjscb(const char *, void *, void *);
static void emitattrkobjs(FILE *);
static int emitattrkobjscb(const char *, void *, void *);
static void emitkobjs(FILE *);
static void emitcfiles(FILE *);
static void emitsfiles(FILE *);
static void emitrules(FILE *);
@ -77,6 +82,9 @@ static void emitappmkoptions(FILE *);
static void emitsubs(FILE *, const char *, const char *, int);
static int selectopt(const char *, void *);
/* Generate Makefile to build things per-attribute *.ko (a.k.a modular build). */
int usekobjs = 0; /* XXX */
int
mkmakefile(void)
{
@ -120,7 +128,7 @@ mkmakefile(void)
continue;
}
if (strcmp(line, "%OBJS\n") == 0)
fn = emitobjs;
fn = usekobjs ? emitobjs : emitkobjs;
else if (strcmp(line, "%CFILES\n") == 0)
fn = emitcfiles;
else if (strcmp(line, "%SFILES\n") == 0)
@ -371,6 +379,66 @@ emitobjs(FILE *fp)
putc('\n', fp);
}
static void
emitkobjs(FILE *fp)
{
emitallkobjs(fp);
emitattrkobjs(fp);
}
static void
emitallkobjs(FILE *fp)
{
fputs("OBJS=", fp);
ht_enumerate(attrtab, emitallkobjscb, fp);
putc('\n', fp);
}
static int
emitallkobjscb(const char *name, void *v, void *arg)
{
struct attr *a = v;
FILE *fp = arg;
if (ht_lookup(selecttab, name) == NULL)
return 0;
if (TAILQ_EMPTY(&a->a_files))
return 0;
fprintf(fp, " %s.ko", name);
return 0;
}
static void
emitattrkobjs(FILE *fp)
{
extern struct hashtab *attrtab;
ht_enumerate(attrtab, emitattrkobjscb, fp);
}
static int
emitattrkobjscb(const char *name, void *v, void *arg)
{
struct attr *a = v;
struct files *fi;
FILE *fp = arg;
if (ht_lookup(selecttab, name) == NULL)
return 0;
if (TAILQ_EMPTY(&a->a_files))
return 0;
fputc('\n', fp);
fprintf(fp, "OBJS.%s=", name);
TAILQ_FOREACH(fi, &a->a_files, fi_anext) {
fprintf(fp, " %s.o", fi->fi_base);
}
fputc('\n', fp);
fprintf(fp, "%s.ko: ${OBJS.%s}\n", name, name);
fprintf(fp, "\t${LINK_O}\n");
return 0;
}
static void
emitcfiles(FILE *fp)
{