Re: case-sensitive file names during build

[Pragnesh Sampat]

OK, here they are.  I applied them against 2.6.6 and can regen them if
needed against current -mm.  Also note that If you are using 2.6
versions earlier than 2.6.4, you will probably need 2-3 patches more. 
(These were generated by various people here at TimeSys and modified for
different versions.)

1.  Case insensitivity patch (rename files)

(I can supply a patch to rename all, if needed)

arch/alpha/kernel/vmlinux.lds.S
arch/arm/kernel/vmlinux.lds.S
arch/arm26/kernel/vmlinux.lds.S
arch/cris/arch-v10/vmlinux.lds.S
arch/h8300/kernel/vmlinux.lds.S
arch/i386/kernel/vmlinux.lds.S
arch/ia64/kernel/vmlinux.lds.S
arch/m68k/kernel/vmlinux.lds.S
arch/m68knommu/kernel/vmlinux.lds.S
arch/mips/kernel/vmlinux.lds.S
arch/parisc/kernel/vmlinux.lds.S
arch/ppc/kernel/vmlinux.lds.S
arch/ppc64/kernel/vmlinux.lds.S
arch/s390/kernel/vmlinux.lds.S
arch/sh/kernel/vmlinux.lds.S
arch/sparc/kernel/vmlinux.lds.S
arch/sparc64/kernel/vmlinux.lds.S
arch/um/kernel/vmlinux.lds.S
arch/v850/kernel/vmlinux.lds.S
arch/x86_64/kernel/vmlinux.lds.S

--- cygwin/scripts/Makefile.build-orig
+++ cygwin/scripts/Makefile.build
@@ -200,6 +200,9 @@
 %.s: %.S FORCE
 	$(call if_changed_dep,as_s_S)
 
+%.s: %.S.h FORCE
+	$(call if_changed_dep,as_s_S)
+
 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 
2. Command line length patch

If the list of modules is long enough, modpost on cygwin fails.
scripts/modpost is used to generate <modname>.mod.c files used for
versioning.

The long list seems to be caused by (combination of) if_changed macro
expansion and the actual list of modules being long enough.  The
workaround calls $(cmd_modpost) unconditionally for cygwin and leaves
other hosts unchanged.

There's surely a better fix for this, I didn't understand the details
of if_changed macro enough to come up with one.

--- cygwin/scripts/Makefile.modpost-orig
+++ cygwin/scripts/Makefile.modpost

@@ -46,7 +46,21 @@
 
 _modpost: $(modules)
 
+#
+# XXX cygwin hosts have issues with the length of command line
+# parameters.  The if_changed macro expansion and the actual command
+# ends up exceeding the POSIX (?) limit of 32 K characters
+# so let's try running the command unconditionally
+#
+
+BUILD_HOST := $(shell uname | tr '[A-Z]' '[a-z]')
 
+ifeq "$(findstring cygwin, $(BUILD_HOST))" "cygwin"
+MODPOST_COMMAND = $(cmd_modpost)
+else
+MODPOST_COMMAND = $(call if_changed,modpost)
+endif
+
 # Step 2), invoke modpost
 #  Includes step 3,4
 quiet_cmd_modpost = MODPOST
@@ -56,7 +70,7 @@
 
 .PHONY: __modpost
 __modpost: $(wildcard vmlinux) $(modules:.ko=.o) FORCE
-	$(call cmd,modpost)
+	$(MODPOST_COMMAND)
 
 # Declare generated files as targets for modpost
 $(symverfile):         __modpost ;

3. Some cygwin versions may need <sys/types.h>

Older versions of cygwin lack inttypes.h, so include <sys/types.h> as
needed.

--- cygwin/arch/ppc/boot/utils/mkbugboot.c-orig
+++ cygwin/arch/ppc/boot/utils/mkbugboot.c

@@ -21,6 +21,11 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <fcntl.h>
+#if defined(__CYGWIN__)
+#include <sys/types.h>
+#else
+#include <inttypes.h>
+#endif
 
 #ifdef __i386__
 #define cpu_to_be32(x) le32_to_cpu(x)
@@ -49,11 +54,6 @@
 /* size of read buffer */
 #define SIZE 0x1000
 
-/* typedef long int32_t; */
-typedef unsigned long uint32_t;
-typedef unsigned short uint16_t;
-typedef unsigned char uint8_t;
-
 /* PPCBUG ROM boot header */
 typedef struct bug_boot_header {
   uint8_t	magic_word[4];		/* "BOOT" */

--- cygwin/lib/gen_crc32table.c-orig
+++ cygwin/lib/gen_crc32table.c

@@ -1,6 +1,10 @@
 #include <stdio.h>
 #include "crc32defs.h"
+#if defined(__CYGWIN__)
+#include <sys/types.h>
+#else
 #include <inttypes.h>
+#endif
 
 #define ENTRIES_PER_LINE 4
 
--- cygwin/scripts/sumversion.c-orig
+++ cygwin/scripts/sumversion.c

@@ -1,5 +1,9 @@
+#if defined(__CYGWIN__)
+#include <sys/types.h>
+#else
+#include <stdint.h>
+#endif
 #include <netinet/in.h>
-#include <stdint.h>
 #include <ctype.h>
 #include <errno.h>
 #include <string.h>

Signed-off-by: Pragnesh Sampat <pragnesh.sampat@xxxxxxxxxxx> under
TS0086

-Pragnesh

-
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