We are starting to get "straggler problems" with people compiling current Linux kernels with now-ancient versions of gcc. All the development is being done against gcc 4.x; this simply disallows gcc 4.0 or earlier. We disallow 4.0 as well as 3.x because 4.0 had a fair share of bugs especially around asm() statements; this allows us to remove those workarounds. Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> --- arch/x86/kernel/Makefile | 3 ++- arch/x86/kernel/compiler.c | 5 +++++ 2 files changed, 7 insertions(+), 1 deletions(-) create mode 100644 arch/x86/kernel/compiler.c diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 0925676..a6459b7 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -29,7 +29,8 @@ GCOV_PROFILE_hpet.o := n GCOV_PROFILE_tsc.o := n GCOV_PROFILE_paravirt.o := n -obj-y := process_$(BITS).o signal.o entry_$(BITS).o +obj-y := compiler.o +obj-y += process_$(BITS).o signal.o entry_$(BITS).o obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o obj-y += time.o ioport.o ldt.o dumpstack.o obj-y += setup.o x86_init.o i8259.o irqinit.o diff --git a/arch/x86/kernel/compiler.c b/arch/x86/kernel/compiler.c new file mode 100644 index 0000000..8914974 --- /dev/null +++ b/arch/x86/kernel/compiler.c @@ -0,0 +1,5 @@ +#if __GNUC__ < 4 +#error "Compiling Linux/x86 with gcc 3.x is no longer supported" +#elif __GNUC__ == 4 && __GNUC_MINOR__ < 1 +#error "Compiling Linux/x86 with gcc 4.0 is not supported" +#endif -- 1.7.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
