Add i486 toolchain support

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3349 42af7a65-404d-4744-a932-0658087f49c3

4 files changed, 136 insertions, 7 deletions

diff --git a/misc/buildroot/ChangeLog b/misc/buildroot/ChangeLog
index 927bc96a1..3ea2b60f3 100644
--- a/misc/buildroot/ChangeLog
+++ b/misc/buildroot/ChangeLog
@@ -81,3 +81,12 @@ buildroot-1.10 2011-xx-xx <spudmonkey@racsa.co.cr>
 
 	* Add patch submitted by Dimiter Georgiev to work around problems in building
 	  GDB 6.8 with versions of Cygwin > 1.7.
+	* configs/i486-defconfig-4.3.3 - Builds an i486 cross development toolchain
+	  using gcc 4.3.3.  Why wouldyou want such a thing?  On Linux, of course,
+	  such a thing is not needed because you can use the installed GCC to build
+	  i486 ELF binaries.  But that will not work under Cygwin!  The Cygwin
+	  toolchain (and probably MinGW), build DOS MZ format executables (i.e.,
+	  .exe files).  That is probably not usable for most NuttX targets.
+	  Instead, you should use this i486-elf-gcc to generate true ELF binaries
+	  under Cygwin.
+
diff --git a/misc/buildroot/ReleaseNotes b/misc/buildroot/ReleaseNotes
index 8206a15f4..d0077d613 100644
--- a/misc/buildroot/ReleaseNotes
+++ b/misc/buildroot/ReleaseNotes
@@ -21,6 +21,20 @@ can be used to build the following NuttX-compatible toolchains:
   o avr-elf toolchain needed for use with the ATmega128 ports
     provided with the NuttX releases.
 
+  o H8/300 toolchain (not currently used in any NuttX
+    configuration).
+
+  o i486-elf toochain.  Why would you want such a thing?  On Linux, of 
+    course, such a thing is not needed because you can use the installed GCC 
+	to build i486 ELF binaries.  But that will not work under Cygwin!  The
+	Cygwin toolchain (and probably MinGW), build DOS MZ format executables
+	(i.e., .exe files).  That is probably not usable for most NuttX targets.
+	Instead, you should use this i486-elf-gcc to generate true ELF binaries
+	under Cygwin.
+
+  o bfin-elf toolchain not currently used in any NuttX
+    configuration).
+
   o m68k-elf toolchain (not currently used in any NuttX
     configuration).
 
@@ -34,15 +48,9 @@ can be used to build the following NuttX-compatible toolchains:
     binutils 2.18 and gcc 3.3.6 and patches available from
     http://www.msextra.com/tools courtesy of James Cortina.
 
-  o sh-elf toolchain needed for the SH-1 NuttX port.
-
   o m32c-elf toolchain needed for the Renesas M16C NuttX port.
 
-  o H8/300 toolchain (not currently used in any NuttX
-    configuration).
-
-  o bfin-elf toolchain not currently used in any NuttX
-    configuration).
+  o sh-elf toolchain needed for the SH-1 NuttX port.
 
 Supported tool versions include:
 
diff --git a/misc/buildroot/configs/README.txt b/misc/buildroot/configs/README.txt
index 6421afaa6..91c2fcc42 100644
--- a/misc/buildroot/configs/README.txt
+++ b/misc/buildroot/configs/README.txt
@@ -61,6 +61,15 @@ bfin-defconfig-4.2.4
 h8300_config
 	Builds an H8/300 toolchain using gcc 3.4.6
 
+i486-defconfig-4.3.3
+	Builds an i486 cross development toolchain using gcc 4.3.3.  Why would
+	you want such a thing?  On Linux, of course, such a thing is not needed
+	because you can use the installed GCC to build i486 ELF binaries.  But
+	that will not work under Cygwin!  The Cygwin toolchain (and probably
+	MinGW), build DOS MZ format executables (i.e., .exe files).  That is
+	probably not usable for most NuttX targets.  Instead, you should use this
+	i486-elf-gcc to generate true ELF binaries under Cygwin.
+
 m32c_defconfig_4.2.4
 m32c_defconfig_4.3.3
 	Build a toolchain for use with the M16C port using eith gcc 4.2.4 or 4.3.3
diff --git a/misc/buildroot/configs/i486-defconfig-4.3.3 b/misc/buildroot/configs/i486-defconfig-4.3.3
new file mode 100644
index 000000000..c99130521
--- /dev/null
+++ b/misc/buildroot/configs/i486-defconfig-4.3.3
@@ -0,0 +1,103 @@
+#
+# Automatically generated make config: don't edit
+#
+BR2_HAVE_DOT_CONFIG=y
+# BR2_alpha is not set
+# BR2_arm is not set
+# BR2_armeb is not set
+# BR2_avr is not set
+# BR2_avr32 is not set
+# BR2_bfin is not set
+# BR2_cris is not set
+BR2_i386=y
+# BR2_m32c is not set
+# BR2_m68k is not set
+# BR2_m68hc11 is not set
+# BR2_m68hc12 is not set
+# BR2_m9s12x is not set
+# BR2_mips is not set
+# BR2_mipsel is not set
+# BR2_nios2 is not set
+# BR2_powerpc is not set
+# BR2_sh is not set
+# BR2_sh64 is not set
+# BR2_h8300 is not set
+# BR2_sparc is not set
+# BR2_x86_64 is not set
+# BR2_x86_i386 is not set
+BR2_x86_i486=y
+# BR2_x86_i586 is not set
+# BR2_x86_i686 is not set
+BR2_ARCH="i486"
+BR2_GCC_TARGET_TUNE="i486"
+BR2_GCC_TARGET_ARCH="i486"
+BR2_ENDIAN="LITTLE"
+
+#
+# Build options
+#
+BR2_WGET="wget --passive-ftp"
+BR2_SVN="svn co"
+BR2_ZCAT="zcat"
+BR2_BZCAT="bzcat"
+BR2_TAR_OPTIONS=""
+BR2_DL_DIR="$(BASE_DIR)/../archives"
+BR2_STAGING_DIR="$(BUILD_DIR)/staging_dir"
+BR2_NUTTX_DIR="$(TOPDIR)/../../nuttx"
+BR2_TOPDIR_PREFIX=""
+BR2_TOPDIR_SUFFIX=""
+BR2_GNU_BUILD_SUFFIX="pc-elf"
+BR2_GNU_TARGET_SUFFIX="elf"
+# BR2_PREFER_IMA is not set
+
+#
+# Toolchain Options
+#
+
+#
+# Binutils Options
+#
+# BR2_BINUTILS_VERSION_2_17 is not set
+# BR2_BINUTILS_VERSION_2_18 is not set
+# BR2_BINUTILS_VERSION_2_19 is not set
+BR2_BINUTILS_VERSION_2_19_1=y
+BR2_BINUTILS_VERSION="2.19.1"
+BR2_EXTRA_BINUTILS_CONFIG_OPTIONS=""
+
+#
+# GCC Options
+#
+BR2_PACKAGE_GCC=y
+# BR2_GCC_VERSION_3_3_6 is not set
+# BR2_GCC_VERSION_3_4_6 is not set
+# BR2_GCC_VERSION_4_2_4 is not set
+BR2_GCC_VERSION_4_3_3=y
+BR2_GCC_SUPPORTS_SYSROOT=y
+BR2_GCC_VERSION="4.3.3"
+# BR2_GCC_USE_SJLJ_EXCEPTIONS is not set
+BR2_EXTRA_GCC_CONFIG_OPTIONS=""
+BR2_INSTALL_LIBSTDCPP=y
+# BR2_INSTALL_LIBGCJ is not set
+# BR2_INSTALL_OBJC is not set
+# BR2_INSTALL_FORTRAN is not set
+
+#
+# Gdb Options
+#
+# BR2_PACKAGE_GDB is not set
+# BR2_PACKAGE_GDB_SERVER is not set
+# BR2_PACKAGE_GDB_HOST is not set
+
+#
+# NuttX Binary Support
+#
+BR2_PACKAGE_GENROMFS=y
+
+#
+# Common Toolchain Options
+#
+# BR2_PACKAGE_SSTRIP_TARGET is not set
+# BR2_PACKAGE_SSTRIP_HOST is not set
+# BR2_ENABLE_MULTILIB is not set
+BR2_LARGEFILE=y
+BR2_TARGET_OPTIMIZATION="-Os -pipe"