Changes between Version 6 and Version 7 of ARM_QEMU

Timestamp:

Feb 5, 2008 8:40:41 PM (15 years ago)

Author:

bennylp

Comment:

--

ARM_QEMU

@@ -33 +33 @@
 Download latest toolchain:
  * binutils: http://ftp.gnu.org/gnu/binutils/
+ * linux: http://www.kernel.org
  * gcc: http://ftp.gnu.org/gnu/gcc/
  * newlib: ftp://sources.redhat.com/pub/newlib/index.html
@@ -40 +41 @@
   $ cd /arm/setup/download
   $ wget -c http://ftp.gnu.org/gnu/binutils/binutils-2.18.tar.bz2
+  $ wget -c http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.24.tar.bz2
   $ wget -c http://ftp.gnu.org/gnu/gcc/gcc-3.4.6/gcc-3.4.6.tar.bz2
   $ wget -c ftp://sources.redhat.com/pub/newlib/newlib-1.16.0.tar.gz
@@ -62 +64 @@
   $ cd /arm/setup/srcs
   $ tar xjf ../download/binutils-2.18.tar.bz2
+  $ tar xjf ../download/linux-2.6.24.tar.bz2
   $ tar xjf ../download/gcc-3.4.6.tar.bz2
   $ tar xzf ../download/newlib-1.16.0.tar.gz
@@ -80 +83 @@
 ''(if you're wondering, that will take 5 minutes on a Core2Duo 2GHz)''
 
+==== Prepare Linux Kernel Header Files ====
+
+You need to have ''ncurses'' development package to do this. To install ncurses development package on Debian:
+{{{
+  $ sudo apt-get install ncurses-dev
+}}}
+
+or on RedHat:
+{{{
+  $ yum install ncurses-devel
+}}}
+
+Configure Linux:
+{{{
+  $ cd /arm/setup/srcs
+  $ cd linux-2.6.24/
+  $ make menuconfig ARCH=arm
+}}}
+(Note: don't forget the ''ARCH=arm'' part above)
+
+We don't need need to build the kernel now.
+
+Now lets fix include directories:
+{{{
+mkdir -p /arm/arm-elf/include
+cd /arm/arm-elf/include
+ln -sd /arm/setup/srcs/linux-2.6.24/include/asm-arm asm
+ln -sd /arm/setup/srcs/linux-2.6.24/include/linux linux
+cd ..
+ln -sd include sys-linux
+}}}
+
 ==== Update binutils Path ====
 
@@ -88 +123 @@
   $ export PATH=/arm/bin:$PATH
 }}}
+
 
 
@@ -103 +139 @@
   $ cd /arm/setup/objs/gcc-arm
   $ ../../srcs/gcc-3.4.6/configure --target=arm-elf --prefix=/arm --enable-threads \
-                                  --with-cpu=arm9 --enable-languages=c,c++ \
-                                  --disable-nls --with-newlib --disable-shared \
-                                  --with-float=soft
+                                   --enable-languages=c,c++ \
+                                   --disable-nls --with-newlib --disable-shared \
+                                   --with-fpu=-softfpa --with-float=soft
   $ make
   $ make install
@@ -119 +155 @@
   $ cd /your/pjproject/directory
   $ make distclean
-  $ ./aconfigure --host=arm-elf --disable-floating-point --disable-sound CFLAGS='-msoft-float'
+  $ ./aconfigure --host=arm-elf --disable-floating-point \
+                 --disable-sound \
+                  CFLAGS='-I/arm/arm-elf/include -msoft-float -D_POSIX_SOURCE'
   $ make dep
   $ make
@@ -131 +169 @@
 You may get error about ''configure not being able to create executable'', and {{{config.log}}} reveals error message similar to:
 
- ''ERROR: foo uses hardware FP, whereas bar uses software FP''
+ ''"/arm/lib/gcc/arm-elf/3.4.6/../../../../arm-elf/bin/ld: ERROR: /arm/lib/gcc/arm-elf/3.4.6/crtn.o uses hardware FP, whereas a.out uses software FP"''
 
-I think, this error was caused by lack of {{{--with-float=soft}}} when configuring gcc.
+I '''think''', it's because gcc was compiled without {{{--with-fpu=-softfpa}}} and {{{--with-float=soft}}} options above.
 
+=== Conflicting Types ===
 
+Something like:
+ ''/arm/lib/gcc/arm-elf/3.4.6/../../../../arm-elf/include/linux/types.h:19: error: conflicting types for 'dev_t' ''
+ ''/arm/lib/gcc/arm-elf/3.4.6/../../../../arm-elf/include/sys/types.h:163: error: previous declaration of 'dev_t' was here''
+
+== References ==
+
+ * [http://en.wikipedia.org/wiki/ARM_architecture ARM architecture (Wikipedia)]
+ * [http://www.ailis.de/~k/archives/19-ARM-cross-compiling-howto.html ARM cross-compiling howto - K's cluttered loft]
+ * [http://www.schnozzle.org/~coldwell/toolchain/ Building a GNU/Linux ARM Toolchain]
+ * [http://gcc.gnu.org/install/index.html Installing GCC]