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https://github.com/RIOT-OS/RIOT.git
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c0e997a8e7
Modern binutils complain about segments with RWX permissions. While
this is indeed a bad habit, RIOT ignores segments permissions anyway.
(We do have a `mpu_noexec_ram` module to disable execution of all of
RAM, which would do so regardless of the segment permission.) So for
now, we can safely just disable the warning.
This fixes:
/usr/lib/gcc/arm-none-eabi/12.2.0/../../../../arm-none-eabi/bin/ld: warning: /home/maribu/Repos/software/RIOT/examples/default/bin/nucleo-f767zi/default.elf has a LOAD segment with RWX permissions
collect2: error: ld returned 1 exit status
41 lines
1.8 KiB
Makefile
41 lines
1.8 KiB
Makefile
ifneq (,$(filter picolibc,$(USEMODULE)))
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# Test if picolibc.specs is available
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ifeq ($(shell $(LINK) -specs=picolibc.specs -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)
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USE_PICOLIBC = 1
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ifeq ($(shell echo "int main(){} void _exit(int n) {(void)n;while(1);}" | LC_ALL=C $(LINK) -xc - -o /dev/null -lc -specs=picolibc.specs -Wall -Wextra -pedantic 2>&1 | grep -q "use of wchar_t values across objects may fail" ; echo $$?),0)
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CFLAGS += -fshort-wchar
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LINKFLAGS += -Wl,--no-wchar-size-warning
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endif
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else
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BUILDDEPS += _missing-picolibc
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endif
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endif
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.PHONY: _missing-picolibc
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_missing-picolibc:
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@$(Q)echo "picolibc was selected to be build but no picolibc.specs could be found"
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@$(Q)echo "you might want to install "picolibc" for "$(TARGET_ARCH)""
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@$(Q)echo "or add "FEATURES_BLACKLIST += picolibc" to Makefile)"
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@$(COLOR_ECHO) "$(COLOR_RED)check your installation or build configuration.$(COLOR_RESET)"
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@$(Q)exit 1
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ifeq (1,$(USE_PICOLIBC))
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LINKFLAGS += -specs=picolibc.specs
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CFLAGS += -specs=picolibc.specs
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ifeq (,$(filter printf_float scanf_float,$(USEMODULE)))
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CFLAGS += -DPICOLIBC_INTEGER_PRINTF_SCANF
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LINKFLAGS += -DPICOLIBC_INTEGER_PRINTF_SCANF
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endif
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# For some reason segments with RWX permissions will be created with
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# picolibc. But since (as of now) RIOT only supports disabling the execute of
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# all RAM via the `mpu_noexec_ram` module, permissions of the segments are
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# ignored anyway. So for now, we just simply disable the warning.
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LINKER_SUPPORTS_NOWARNRWX ?= $(shell echo "int main(){} void _exit(int n) {(void)n;while(1);}" | LC_ALL=C $(LINK) -xc - -o /dev/null -lc -Wall -Wextra -pedantic -Wl,--no-warn-rwx-segments 2> /dev/null && echo 1 || echo 0)
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ifeq (1,$(LINKER_SUPPORTS_NOWARNRWX))
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LINKFLAGS += -Wl,--no-warn-rwx-segments
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endif
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endif
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LINKFLAGS += -lc
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