core: add BR2_HOSTARCH_NEEDS_IA32_COMPILER option

Some bootloaders (such as Grub) need to be built for x86 (i.e IA32)
even if the target architecture is x86-64. However, when the target
architecture is x86-64, the cross-compiler generated by Buildroot is
not able to generate 32 bits code.

To solve this, we will rely on the host compiler being a x86 + x86-64
compiler. Therefore, this commit introduces the
BR2_HOSTARCH_NEEDS_IA32_COMPILER option, which tells the dependency
checking logic to verify that the host compiler is indeed capable of
building x86 32 bits code.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni
2013-11-11 17:47:25 +01:00
committed by Peter Korsgaard
parent 971795f55a
commit 0e4bc50210
2 changed files with 15 additions and 0 deletions

View File

@@ -20,6 +20,12 @@ config BR2_HOSTARCH
config BR2_HOSTARCH_NEEDS_IA32_LIBS
bool
# Hidden boolean selected by packages that need to build 32 bits
# binaries with the host compiler, even on 64 bits build machines (e.g
# bootloaders).
config BR2_HOSTARCH_NEEDS_IA32_COMPILER
bool
source "arch/Config.in"
menu "Build options"