2.6.x Kernel Compilation Problems

2.6.x Kernel Compilation Problems

With Ubuntu 12 is no longer possible to build old 2.6 kernels (2.6.30 in my case). The problem is that gcc 4.6 doesn't support anymore linker-style architecture options.

PROBLEM:

gcc: error: elf_i386: No such file or directory
  OBJCOPY arch/x86/vdso/vdso32-int80.so
objcopy: 'arch/x86/vdso/vdso32-int80.so.dbg': No such file
make[2]: *** [arch/x86/vdso/vdso32-int80.so] Error 1
make[1]: *** [arch/x86/vdso] Error 2
make: *** [arch/x86] Error 2

SOLUTION:

---

Apply the following changes to solve the problem :

In arch/x86/vdso/Makefile :

replace "-m elf_x86_64" by "-m64" on the line starting with VDSO_LDFLAGS_vdso.lds

replace "-m elf_i386" by "-m32" on the line starting with VDSO_LDFLAGS_vdso32.lds