[U-Boot-Users] [PPCBoot-users] Using gcc-3.4 to compile u-boot on powerpc

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[U-Boot-Users] [PPCBoot-users] Using gcc-3.4 to compile u-boot on powerpc

Murray Jensen
Hi All, a small but important thing... I am using the latest gcc from cvs
(3.4 20030608 (experimental)) and if you build the cross compiler for a
powerpc/linux target, it leaves out the "fixup" stuff for the "-mrelocatable"
command line option. If you then want to use that cross compiler to build
"u-boot", it stuffs up with messages from the Assembler that looks something
like this (on certain C files):

... Error: Relocation cannot be done when using -mrelocatable

Since "-mrelocatable" is usually not used for Linux programs, I can't see why
they did this. Rather than have two different cross compilers, one for linux
and one for "other", which you use to compile u-boot, I chose a simple fix -
patch the file "gcc/config/rs6000/linux.h" as follows:

--- linux.h     2003/06/13 16:41:53     1.3
+++ linux.h     2003/06/20 01:28:53
@@ -84,7 +84,8 @@
 #define TARGET_64BIT 0
   
 /* We don't need to generate entries in .fixup.  */
-#undef RELOCATABLE_NEEDS_FIXUP
+/* well I do need them! */
+#define RELOCATABLE_NEEDS_FIXUP
 
 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack

Hope this helps someone. Cheers!
                                                                Murray...
--
Murray Jensen, CSIRO Manufacturing & Infra. Tech.      Phone: +61 3 9662 7763
Locked Bag No. 9, Preston, Vic, 3072, Australia.         Fax: +61 3 9662 7853
Internet: Murray.Jensen at csiro.au

Hymod project: http://www.msa.cmst.csiro.au/projects/Hymod/

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