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build(fpga): correctly handle gcc as linker for LTO

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When LTO is enabled and gcc is used as a linker, then option for a
linker have to be provided with a -Wl prefix to gcc.

To build PLAT=arm_fpga with LTO enabled extra '-nostdlib' has to be
supplied to the linker at least, otherwise build fails with an error
about many undefined references in libc.
Since this option is defined as part of common TF_LDFLAGS already,
just use that variable with couple extra options.

Change-Id: Iaab72d894317c91af5b7d770652e4353b32aae88
Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
This commit is contained in:
Andrey Skvortsov 2024-02-24 00:50:05 +03:00
parent 31f80efeef
commit acf0076ae2
1 changed files with 7 additions and 1 deletions

8
plat/arm/board/arm_fpga/platform.mk
View file

@ -127,8 +127,14 @@ $(eval $(call MAKE_S,$(BUILD_PLAT),plat/arm/board/arm_fpga/rom_trampoline.S,bl31
$(eval $(call MAKE_S,$(BUILD_PLAT),plat/arm/board/arm_fpga/kernel_trampoline.S,bl31))
$(eval $(call MAKE_LD,$(BUILD_PLAT)/build_axf.ld,plat/arm/board/arm_fpga/build_axf.ld.S,bl31))
ifeq ($($(ARCH)-ld-id),gnu-gcc)
PLAT_LDFLAGS += -Wl,--strip-debug
else
PLAT_LDFLAGS += --strip-debug
endif
bl31.axf: bl31 dtbs ${BUILD_PLAT}/rom_trampoline.o ${BUILD_PLAT}/kernel_trampoline.o ${BUILD_PLAT}/build_axf.ld
$(ECHO) " LD $@"
$(Q)$($(ARCH)-ld) -T ${BUILD_PLAT}/build_axf.ld -L ${BUILD_PLAT} --strip-debug -s -n -o ${BUILD_PLAT}/bl31.axf
$(Q)$($(ARCH)-ld) -T ${BUILD_PLAT}/build_axf.ld -L ${BUILD_PLAT} $(TF_LDFLAGS) $(PLAT_LDFLAGS) -s -n -o ${BUILD_PLAT}/bl31.axf
all: bl31.axf