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How do I use Sourcery G++ to build the Linux (or uClinux) kernel on Windows?

Question

How do I use Sourcery G++ to build the Linux (or uClinux) kernel on Windows?

Answer

  • Upgrade to Sourcery G++ 4.2-9 or later.

  • Download and install Cygwin from:

    Install all the development tools and libraries.

  • Download uClinux-dist-20070130.tar.bz2 from:

  • Copy uClinux-dist-20070130.tar.bz2 to your Cygwin home directory c:\cygwin\home\user, where user is your Cygwin user name.

  • Start a Cygwin shell. All subsequent steps assume you are in a Cygwin shell.

  • Change to your home directory:

    > cd $HOME

  • Unpack uClinux-dist:

    > tar jxf uClinux-dist-20070130.tar.bz2

  • Enter the uClinux-dist directory.

    > cd uClinux-dist

  • Apply this patch

  • Set CYGPATH as instructed in the Sourcery G++ Getting Started guide. See the related knowledge base entry Using Sourcery G++ Without Cygwin for additional information.

  • Build uClinux following the procedure in the uClinux README.

    e.g.

    > make xconfig
> make dep
> make

Notes:

  • Unpacking uClinux-dist-20070130 with verification enabled will report errors. There are files in the the uClinux-dist archive which cannot be created on a Windows file system.

  • In uClinux-dist-20070130 when building the linux-2.6.x kernel for m68knommu, the drivers/mtd/chips/jedec_probe.c source file fails to compile because MTD_UADDR_0x1554_0x0AAA is undefined. Remove the following support from your kernel to continue building:

    e.g. For m68knommu:

    > cd linux-2.6.x/
> make ARCH=m68knommu CROSS_COMPILE=m68k-linux-gnu- menuconfig

    Remove support for "Detect non-CFI AMD/JEDEC-compatible flash chips". Located under: "Device Drivers --->", "Memory Technology Devices (MTD) --->", and "RAM/ROM/Flash Chip drivers --->".


Patch against uClinux-dist-20070130:

diff -urN linux-2.6.x/arch/arm/boot/compressed/Makefile linux-2.6.x/arch/arm/boot/compressed/Makefile
--- linux-2.6.x/arch/arm/boot/compressed/Makefile   2006-11-29 18:02:59.000000000 -0800
+++ linux-2.6.x/arch/arm/boot/compressed/Makefile   2007-04-24 08:55:50.742375000 -0700
@@ -104,7 +104,7 @@
 LDFLAGS_vmlinux += --defsym params_phys=$(PARAMS_PHYS)
 endif
 LDFLAGS_vmlinux += -p --no-undefined -X \
-   $(shell $(CC) $(CFLAGS) --print-libgcc-file-name) -T
+   "$(shell $(CC) $(CFLAGS) --print-libgcc-file-name)" -T

 # Don't allow any static data in misc.o, which
 # would otherwise mess up our GOT table
diff -urN linux-2.6.x/arch/powerpc/boot/Makefile linux-2.6.x/arch/powerpc/boot/Makefile
--- linux-2.6.x/arch/powerpc/boot/Makefile  2006-11-29 15:28:12.000000000 -0800
+++ linux-2.6.x/arch/powerpc/boot/Makefile  2007-04-24 09:09:03.367375000 -0700
@@ -24,7 +24,7 @@

 HOSTCC             := gcc
 BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
-              $(shell $(CROSS32CC) -print-file-name=include) -fPIC
+              "$(shell $(CROSS32CC) -print-file-name=include)" -fPIC
 BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc

 ifeq ($(call cc-option-yn, -fstack-protector),y)
@@ -77,10 +77,10 @@
            $(obj)/empty.c

 quiet_cmd_bootcc = BOOTCC  $@
-      cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
+      cmd_bootcc = $(CROSS32CC) -Wp,-MMD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<

 quiet_cmd_bootas = BOOTAS  $@
-      cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
+      cmd_bootas = $(CROSS32CC) -Wp,-MMD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<

 quiet_cmd_bootar = BOOTAR  $@
       cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $^; mv $@.$$$$ $@
diff -urN linux-2.6.x/scripts/Kbuild.include linux-2.6.x/scripts/Kbuild.include
--- linux-2.6.x/scripts/Kbuild.include      2006-11-29 15:28:19.000000000 -0800
+++ linux-2.6.x/scripts/Kbuild.include      2007-04-24 08:53:29.679875000 -0700
@@ -160,7 +160,8 @@
 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ),                  \
    @set -e;                                                             \
    $(echo-cmd) $(cmd_$(1));                                             \
-   scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
+   dos2unix $(depfile);                                                 \
+   scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' | unix2dos > $(dot-target).tmp;\
    rm -f $(depfile);                                                    \
    mv -f $(dot-target).tmp $(dot-target).cmd)

diff -urN linux-2.6.x/scripts/Makefile.build linux-2.6.x/scripts/Makefile.build
--- linux-2.6.x/scripts/Makefile.build      2006-11-29 15:28:19.000000000 -0800
+++ linux-2.6.x/scripts/Makefile.build      2007-04-24 08:53:29.711125000 -0700
@@ -190,8 +190,9 @@
 define rule_cc_o_c
    $(call echo-cmd,checksrc) $(cmd_checksrc)                         \
    $(call echo-cmd,cc_o_c) $(cmd_cc_o_c);                            \
+   dos2unix $(depfile);                                              \
    $(cmd_modversions)                                                \
-   scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
+   scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' | unix2dos >    \
                                                  $(dot-target).tmp;  \
    rm -f $(depfile);                                                 \
    mv -f $(dot-target).tmp $(dot-target).cmd
diff -urN linux-2.6.x/scripts/Makefile.host linux-2.6.x/scripts/Makefile.host
--- linux-2.6.x/scripts/Makefile.host       2006-11-29 15:28:19.000000000 -0800
+++ linux-2.6.x/scripts/Makefile.host       2007-04-24 11:13:08.273625000 -0700
@@ -168,3 +168,4 @@
 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
       $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)

+HOST_LOADLIBES := -lintl -lncurses
diff -urN linux-2.6.x/scripts/Makefile.lib linux-2.6.x/scripts/Makefile.lib
--- linux-2.6.x/scripts/Makefile.lib        2006-10-08 17:02:05.000000000 -0700
+++ linux-2.6.x/scripts/Makefile.lib        2007-04-24 08:53:29.773625000 -0700
@@ -108,14 +108,14 @@
 __cpp_flags     =                          $(call flags,_cpp_flags)
 endif

-c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
+c_flags        = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
             $(__c_flags) $(modkern_cflags) \
             -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)

-a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
+a_flags        = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
             $(__a_flags) $(modkern_aflags)

-cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags)
+cpp_flags      = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags)

 ld_flags       = $(LDFLAGS) $(EXTRA_LDFLAGS)

diff -urN linux-2.6.x/scripts/mkcompile_h linux-2.6.x/scripts/mkcompile_h
--- linux-2.6.x/scripts/mkcompile_h 2005-10-27 21:39:22.000000000 -0700
+++ linux-2.6.x/scripts/mkcompile_h 2007-04-24 08:53:29.773625000 -0700
@@ -58,7 +58,7 @@
     echo \#define LINUX_COMPILE_DOMAIN
   fi

-  echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\"
+  echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | dos2unix | tail -n 1 `\"
 ) > .tmpcompile

 # Only replace the real compile.h if the new one is different,
diff -urN linux-2.6.x/scripts/mod/file2alias.c linux-2.6.x/scripts/mod/file2alias.c
--- linux-2.6.x/scripts/mod/file2alias.c    2006-11-29 15:28:19.000000000 -0800
+++ linux-2.6.x/scripts/mod/file2alias.c    2007-04-24 08:53:29.789250000 -0700
@@ -29,7 +29,11 @@

 #include <ctype.h>

+#ifdef __CYGWIN__
+typedef __uint32_t      __u32;
+#else
 typedef uint32_t   __u32;
+#endif
 typedef uint16_t   __u16;
 typedef unsigned char      __u8;

diff -urN linux-2.6.x/scripts/mod/modpost.h linux-2.6.x/scripts/mod/modpost.h
--- linux-2.6.x/scripts/mod/modpost.h       2006-10-08 17:02:05.000000000 -0700
+++ linux-2.6.x/scripts/mod/modpost.h       2007-04-24 08:53:29.804875000 -0700
@@ -9,6 +9,11 @@
 #include <unistd.h>
 #include <elf.h>

+#ifdef __CYGWIN__
+typedef uint16_t Elf32_Section;
+typedef uint16_t Elf64_Section;
+#endif
+
 #include "elfconfig.h"

 #if KERNEL_ELFCLASS == ELFCLASS32
diff -urN linux-2.6.x/scripts/mod/sumversion.c linux-2.6.x/scripts/mod/sumversion.c
--- linux-2.6.x/scripts/mod/sumversion.c    2006-06-18 16:30:49.000000000 -0700
+++ linux-2.6.x/scripts/mod/sumversion.c    2007-04-24 08:53:29.820500000 -0700
@@ -7,6 +7,7 @@
 #include <ctype.h>
 #include <errno.h>
 #include <string.h>
+#include <limits.h>
 #include "modpost.h"

 /*

This entry was last updated on 4 October 2009.

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