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bios: Fix PHDR link error 

binutils 2.34 contains stricter checks for sections that are not
included in the linker script, resulting in this error:

 ld: bios.elf: error: PHDR segment not covered by LOAD segment

From the 2.34 NEWS:

  The ld check for "PHDR segment not covered by LOAD segment" is more
  effective, catching cases that were wrongly allowed by previous versions of
  ld.  If you see this error it is likely you are linking with a bad linker
  script or the binary you are building is not intended to be loaded by a
  dynamic loader.  In the latter case --no-dynamic-linker is appropriate.

As the BIOS runs bare metal, we do not need to emit a PHDR segment.

Signed-off-by: Joel Stanley <joel@jms.id.au>
This commit is contained in:
Joel Stanley 2021-09-01 15:33:44 +09:30
parent 1d27e25cbb
commit c74e3642b3
1 changed files with 1 additions and 1 deletions
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litex/soc/software/common.mak
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@ -53,7 +53,7 @@ INCLUDES = -I$(SOC_DIRECTORY)/software/include/base \
COMMONFLAGS = $(DEPFLAGS) -Os $(CPUFLAGS) -g3 -fomit-frame-pointer -Wall -fno-builtin -nostdinc -fno-stack-protector $(INCLUDES) COMMONFLAGS = $(DEPFLAGS) -Os $(CPUFLAGS) -g3 -fomit-frame-pointer -Wall -fno-builtin -nostdinc -fno-stack-protector $(INCLUDES)
CFLAGS = $(COMMONFLAGS) -fexceptions -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes CFLAGS = $(COMMONFLAGS) -fexceptions -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes
CXXFLAGS = $(COMMONFLAGS) -std=c++11 -I$(SOC_DIRECTORY)/software/include/basec++ -fexceptions -fno-rtti -ffreestanding CXXFLAGS = $(COMMONFLAGS) -std=c++11 -I$(SOC_DIRECTORY)/software/include/basec++ -fexceptions -fno-rtti -ffreestanding
LDFLAGS = -nostdlib -nodefaultlibs -L$(BUILDINC_DIRECTORY) LDFLAGS = -nostdlib -nodefaultlibs -Wl,--no-dynamic-linker -L$(BUILDINC_DIRECTORY)
define compilexx define compilexx
$(CX) -c $(CXXFLAGS) $(1) $< -o $@ $(CX) -c $(CXXFLAGS) $(1) $< -o $@