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Subject[PATCH] 2.4.2-pre3 mkdep -I support
Date
Get rid of the special case in drivers/acpi/Makefile.  mkdep now uses
the same -I options in the same order as the compiler. Against 2.4.2-pre3.
Please jump up and down on this patch before I send it to Linus.

Index: 2-pre3.1/scripts/mkdep.c
--- 2-pre3.1/scripts/mkdep.c Fri, 05 Jan 2001 13:42:29 +1100 kaos (linux-2.4/12_mkdep.c 1.1 644)
+++ 2-pre3.3/scripts/mkdep.c Sun, 11 Feb 2001 15:23:52 +1100 kaos (linux-2.4/12_mkdep.c 1.3 644)
@@ -2,7 +2,7 @@
* Originally by Linus Torvalds.
* Smart CONFIG_* processing by Werner Almesberger, Michael Chastain.
*
- * Usage: mkdep file ...
+ * Usage: mkdep cflags -- file ...
*
* Read source files and output makefile dependency lines for them.
* I make simple dependency lines for #include <*.h> and #include "*.h".
@@ -22,10 +22,17 @@
* 2.3.99-pre1, Andrew Morton <andrewm@uow.edu.au>
* - Changed so that 'filename.o' depends upon 'filename.[cS]'. This is so that
* missing source files are noticed, rather than silently ignored.
+ *
+ * 2.4.2-pre3, Keith Owens <kaos@ocs.com.au>
+ * - Accept cflags followed by '--' followed by filenames. mkdep extracts -I
+ * options from cflags and looks in the specified directories as well as the
+ * defaults. Only -I is supported, no attempt is made to handle -idirafter,
+ * -isystem, -I- etc.
*/

#include <ctype.h>
#include <fcntl.h>
+#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -44,11 +51,10 @@ int hasdep;

struct path_struct {
int len;
- char buffer[256-sizeof(int)];
-} path_array[2] = {
- { 0, "" },
- { 0, "" }
+ char *buffer;
};
+struct path_struct *path_array;
+int paths;


/* Current input file */
@@ -181,9 +187,10 @@ void define_precious(const char * filena
/*
* Handle an #include line.
*/
-void handle_include(int type, const char * name, int len)
+void handle_include(int start, const char * name, int len)
{
- struct path_struct *path = path_array+type;
+ struct path_struct *path;
+ int i;

if (len == 14 && !memcmp(name, "linux/config.h", len))
return;
@@ -191,13 +198,53 @@ void handle_include(int type, const char
if (len >= 7 && !memcmp(name, "config/", 7))
define_config(name+7, len-7-2);

- memcpy(path->buffer+path->len, name, len);
- path->buffer[path->len+len] = '\0';
- if (access(path->buffer, F_OK) != 0)
- return;
+ for (i = start, path = path_array+start; i < paths; ++i, ++path) {
+ memcpy(path->buffer+path->len, name, len);
+ path->buffer[path->len+len] = '\0';
+ if (access(path->buffer, F_OK) == 0) {
+ do_depname();
+ printf(" \\\n %s", path->buffer);
+ return;
+ }
+ }

- do_depname();
- printf(" \\\n %s", path->buffer);
+}
+
+
+
+/*
+ * Add a path to the list of include paths.
+ */
+void add_path(const char * name)
+{
+ struct path_struct *path;
+ char resolved_path[PATH_MAX+1];
+ const char *name2;
+
+ name2 = realpath(name, resolved_path);
+ if (!name2) {
+ fprintf(stderr, "realpath(%s) failed, %m\n", name);
+ exit(1);
+ }
+
+ path_array = realloc(path_array, (++paths)*sizeof(*path_array));
+ if (!path_array) {
+ fprintf(stderr, "cannot expand path_arry\n");
+ exit(1);
+ }
+
+ path = path_array+paths-1;
+ path->len = strlen(name2);
+ path->buffer = malloc(path->len+1+256+1);
+ if (!path->buffer) {
+ fprintf(stderr, "cannot allocate path buffer\n");
+ exit(1);
+ }
+ strcpy(path->buffer, name2);
+ if (*(path->buffer+path->len-1) != '/') {
+ *(path->buffer+path->len) = '/';
+ *(path->buffer+(++(path->len))) = '\0';
+ }
}


@@ -210,7 +257,7 @@ void use_config(const char * name, int l
char *pc;
int i;

- pc = path_array[0].buffer + path_array[0].len;
+ pc = path_array[paths-1].buffer + path_array[paths-1].len;
memcpy(pc, "config/", 7);
pc += 7;

@@ -228,7 +275,7 @@ void use_config(const char * name, int l
define_config(pc, len);

do_depname();
- printf(" \\\n $(wildcard %s.h)", path_array[0].buffer);
+ printf(" \\\n $(wildcard %s.h)", path_array[paths-1].buffer);
}


@@ -387,7 +434,7 @@ pound_include_dquote:
GETNEXT
CASE('\n', start);
NOTCASE('"', pound_include_dquote);
- handle_include(1, map_dot, next - map_dot - 1);
+ handle_include(0, map_dot, next - map_dot - 1);
goto start;

/* #\s*include\s*<(.*)> */
@@ -395,7 +442,7 @@ pound_include_langle:
GETNEXT
CASE('\n', start);
NOTCASE('>', pound_include_langle);
- handle_include(0, map_dot, next - map_dot - 1);
+ handle_include(1, map_dot, next - map_dot - 1);
goto start;

/* #\s*d */
@@ -524,7 +571,7 @@ void do_depend(const char * filename, co
int main(int argc, char **argv)
{
int len;
- char *hpath;
+ const char *hpath;

hpath = getenv("HPATH");
if (!hpath) {
@@ -532,12 +579,26 @@ int main(int argc, char **argv)
"Don't bypass the top level Makefile.\n", stderr);
return 1;
}
- len = strlen(hpath);
- memcpy(path_array[0].buffer, hpath, len);
- if (len && hpath[len-1] != '/')
- path_array[0].buffer[len++] = '/';
- path_array[0].buffer[len] = '\0';
- path_array[0].len = len;
+
+ add_path("."); /* for #include "..." */
+
+ while (++argv, --argc > 0) {
+ if (strncmp(*argv, "-I", 2) == 0) {
+ if (*((*argv)+2)) {
+ add_path((*argv)+2);
+ }
+ else {
+ ++argv;
+ --argc;
+ add_path(*argv);
+ }
+ }
+ else if (strcmp(*argv, "--") == 0) {
+ break;
+ }
+ }
+
+ add_path(hpath); /* must be last entry, for config files */

while (--argc > 0) {
const char * filename = *++argv;
Index: 2-pre3.1/drivers/acpi/Makefile
--- 2-pre3.1/drivers/acpi/Makefile Tue, 23 Jan 2001 13:26:27 +1100 kaos (linux-2.4/s/b/51_Makefile 1.2 644)
+++ 2-pre3.3/drivers/acpi/Makefile Sun, 11 Feb 2001 15:00:45 +1100 kaos (linux-2.4/s/b/51_Makefile 1.3 644)
@@ -20,14 +20,6 @@ EXTRA_CFLAGS += -I./include

EXTRA_CFLAGS += $(ACPI_CFLAGS)

-# genksyms only reads $(CFLAGS), it should really read $(EXTRA_CFLAGS) as well.
-# Without EXTRA_CFLAGS the gcc pass for genksyms fails, resulting in an empty
-# include/linux/modules/acpi_ksyms.ver. Changing genkyms to use EXTRA_CFLAGS
-# will hit everything, too risky in 2.4.0-prerelease. Bandaid by tweaking
-# CFLAGS only for .ver targets. Review after 2.4.0 release. KAO
-
-$(MODINCL)/%.ver: CFLAGS := -I./include $(CFLAGS)
-
acpi-subdirs := common dispatcher events hardware \
interpreter namespace parser resources tables

Index: 2-pre3.1/Rules.make
--- 2-pre3.1/Rules.make Fri, 05 Jan 2001 13:42:29 +1100 kaos (linux-2.4/T/c/47_Rules.make 1.1 644)
+++ 2-pre3.3/Rules.make Sun, 11 Feb 2001 15:00:45 +1100 kaos (linux-2.4/T/c/47_Rules.make 1.2 644)
@@ -123,7 +123,7 @@ endif
# This make dependencies quickly
#
fastdep: dummy
- $(TOPDIR)/scripts/mkdep $(wildcard *.[chS] local.h.master) > .depend
+ $(TOPDIR)/scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS) -- $(wildcard *.[chS]) > .depend
ifdef ALL_SUB_DIRS
$(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
endif
@@ -222,9 +222,9 @@ endif

$(MODINCL)/%.ver: %.c
@if [ ! -r $(MODINCL)/$*.stamp -o $(MODINCL)/$*.stamp -ot $< ]; then \
- echo '$(CC) $(CFLAGS) -E -D__GENKSYMS__ $<'; \
+ echo '$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -E -D__GENKSYMS__ $<'; \
echo '| $(GENKSYMS) $(genksyms_smp_prefix) -k $(VERSION).$(PATCHLEVEL).$(SUBLEVEL) > $@.tmp'; \
- $(CC) $(CFLAGS) -E -D__GENKSYMS__ $< \
+ $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -E -D__GENKSYMS__ $< \
| $(GENKSYMS) $(genksyms_smp_prefix) -k $(VERSION).$(PATCHLEVEL).$(SUBLEVEL) > $@.tmp; \
if [ -r $@ ] && cmp -s $@ $@.tmp; then echo $@ is unchanged; rm -f $@.tmp; \
else echo mv $@.tmp $@; mv -f $@.tmp $@; fi; \
Index: 2-pre3.1/Makefile
--- 2-pre3.1/Makefile Sat, 10 Feb 2001 13:20:52 +1100 kaos (linux-2.4/T/c/50_Makefile 1.1.2.15 644)
+++ 2-pre3.3/Makefile Sun, 11 Feb 2001 15:00:45 +1100 kaos (linux-2.4/T/c/50_Makefile 1.1.2.16 644)
@@ -440,8 +440,8 @@ sums:
find . -type f -print | sort | xargs sum > .SUMS

dep-files: scripts/mkdep archdep include/linux/version.h
- scripts/mkdep init/*.c > .depend
- scripts/mkdep `find $(FINDHPATH) -name SCCS -prune -o -follow -name \*.h ! -name modversions.h -print` > .hdepend
+ scripts/mkdep -- init/*.c > .depend
+ scripts/mkdep -- `find $(FINDHPATH) -name SCCS -prune -o -follow -name \*.h ! -name modversions.h -print` > .hdepend
$(MAKE) $(patsubst %,_sfdep_%,$(SUBDIRS)) _FASTDEP_ALL_SUB_DIRS="$(SUBDIRS)"
ifdef CONFIG_MODVERSIONS
$(MAKE) update-modverfile
@@ -492,7 +492,7 @@ include Rules.make
#

scripts/mkdep: scripts/mkdep.c
- $(HOSTCC) $(HOSTCFLAGS) -o scripts/mkdep scripts/mkdep.c
+ $(HOSTCC) $(HOSTCFLAGS) -g -o scripts/mkdep scripts/mkdep.c

scripts/split-include: scripts/split-include.c
$(HOSTCC) $(HOSTCFLAGS) -o scripts/split-include scripts/split-include.c
-
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