diff options
| author | Dmitrii Sharshakov <[email protected]> | 2025-11-08 21:48:46 +0100 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2025-11-18 15:52:11 -0600 |
| commit | 91bb236194162472d1e19b0cbc215e25eddc11d0 (patch) | |
| tree | 7eba76c05cb31219ed0461cb9d8109f07197fd66 | |
| parent | 928af44314a1a086e946ef3c0901d40bdb3e19a9 (diff) | |
build: fix prefix for Clang when CROSS_COMPILE is an absolute path
Clang cross-compilation worked when cross binutils were available
in PATH. However, when binutils are not in the PATH clang failed to
discover the assembler, falling back to host one.
Make --prefix always absolute, Clang supports this and will search for
e.g. $(prefix)-as for assembler. This makes sure user does not have to
add cross binutils to PATH for Clang build.
Fixes build for these examples (with qemu_arm(64)_defconfig):
make CC=clang-21 CROSS_COMPILE=/.../bin/arm-none-eabi-
make CC=clang-20 CROSS_COMPILE=/.../bin/aarch64-linux-gnu-
Also validated for the case when provided with cross toolchain on PATH:
PATH=/.../bin:$PATH make CC=clang-21 CROSS_COMPILE=arm-none-eabi- -j20
This patch does not affect GCC builds, and they have _not_ been
validated against regressions.
Reported-by: Tom Rini <[email protected]>
Closes: https://lore.kernel.org/u-boot/20251106221355.GZ6688@bill-the-cat/
Signed-off-by: Dmitrii Sharshakov <[email protected]>
| -rw-r--r-- | Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -600,7 +600,7 @@ ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) ifneq ($(CROSS_COMPILE),) CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) -CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) +CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE:%-=%))- GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) endif ifneq ($(GCC_TOOLCHAIN),) |