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Fix the nRF builds with GCC 11.2

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See adafruit/Adafruit_nRF52_Bootloader#221
for background on the flag.
This commit is contained in:
Scott Shawcroft 2021-09-08 12:44:45 -07:00
parent f3da2808ab
commit f2de010059
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1 changed files with 12 additions and 0 deletions
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12
ports/nrf/Makefile
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@ -103,6 +103,18 @@ CFLAGS += $(OPTIMIZATION_FLAGS)
CFLAGS += $(INC) -Wall -Werror -std=gnu11 -nostdlib -fshort-enums $(BASE_CFLAGS) $(CFLAGS_MOD) $(COPT)
# Nordic Softdevice SDK header files contains inline assembler that has
# broken constraints. As a result the IPA-modref pass, introduced in gcc-11,
# is able to "prove" that arguments to wrapper functions generated with
# the SVCALL() macro are unused and, as a result, the optimizer will remove
# code within the callers that sets up these arguments (which results in
# a broken bootloader). The broken headers come from Nordic-supplied zip
# files and are not trivial to patch so, for now, we'll simply disable the
# new gcc-11 inter-procedural optimizations.
ifeq (,$(findstring unrecognized,$(shell $(CC) $(CFLAGS) -fno-ipa-modref 2>&1)))
CFLAGS += -fno-ipa-modref
endif
# Undo some warnings.
# nrfx does casts that increase alignment requirements.
CFLAGS += -Wno-cast-align