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| author |   Alistair Strachan <astrachan@google.com> | 2018-08-09 09:40:42 -0700 |
|---|---|---|
| committer |   Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-09-26 12:03:58 +0200 |
| commit | 41f1c48420709470c51ee0e54b6fb28b956bb4e0 (patch) | |
| tree | 41fb87527c34f75dca504fdc325f7baf3beaf701 /drivers/firmware | |
| parent | efi: add API to reserve memory persistently across kexec reboot (diff) | |
| download | linux-dev-41f1c48420709470c51ee0e54b6fb28b956bb4e0.tar.xz linux-dev-41f1c48420709470c51ee0e54b6fb28b956bb4e0.zip | |
efi/libstub: arm: support building with clang
When building with CONFIG_EFI and CONFIG_EFI_STUB on ARM, the libstub
Makefile would use -mno-single-pic-base without checking it was
supported by the compiler. As the ARM (32-bit) clang backend does not
support this flag, the build would fail.
This changes the Makefile to check the compiler's support for
-mno-single-pic-base before using it, similar to c1c386681bd7 ("ARM:
8767/1: add support for building ARM kernel with clang").
Signed-off-by: Alistair Strachan <astrachan@google.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/libstub/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 14c40a7750d1..c51627660dbb 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -16,7 +16,8 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \ cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS)) -fpie \ $(DISABLE_STACKLEAK_PLUGIN) cflags-$(CONFIG_ARM) := $(subst -pg,,$(KBUILD_CFLAGS)) \ - -fno-builtin -fpic -mno-single-pic-base + -fno-builtin -fpic \ + $(call cc-option,-mno-single-pic-base) cflags-$(CONFIG_EFI_ARMSTUB) += -I$(srctree)/scripts/dtc/libfdt |