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nrf,stm32: Don't enable debug info by default if LTO is on. 

It seems sometimes gcc with LTO will generate otherwise valid assembly
listings that cause 'as' to error out when generating DWARF debug info; see
https://sourceware.org/bugzilla/show_bug.cgi?id=29494

Therefore, don't enable -g by default if LTO is on.

Enabling LTO=1 DEBUG=1 is still possible but may result in random errors
at link time due to 'as' (the error in this case is "Error: unaligned
opcodes detected in executable segment", and the only other easy workaround
is CFLAGS+=-fno-jump-tables which may increase code size significantly).

Follows on from fdfe4eca74
This commit is contained in:
Angus Gratton 2022-08-15 16:07:00 +10:00 committed by Damien George
parent 6f4d424f46
commit a16a330da5
2 changed files with 8 additions and 4 deletions
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6
ports/nrf/Makefile
View File

@ -138,12 +138,14 @@ LDFLAGS += -Wl,'--defsym=_fs_size=$(FS_SIZE)'
endif
#Debugging/Optimization
CFLAGS += -g # always include debug info in the ELF
ifeq ($(DEBUG), 1)
#ASMFLAGS += -g -gtabs+
CFLAGS += -O0
CFLAGS += -g -O0
LDFLAGS += -O0
else
ifneq ($(LTO), 1)
CFLAGS += -g # always include debug info in the ELF, unless LTO is on
endif
CFLAGS += -Os -DNDEBUG
LDFLAGS += -Os
endif

6
ports/stm32/Makefile
View File

@ -114,13 +114,15 @@ $(BUILD)/stm32_it.o $(BUILD)/pendsv.o: CFLAGS += -fno-lto
endif
# Debugging/Optimization
CFLAGS += -g # always include debug info in the ELF
ifeq ($(DEBUG), 1)
CFLAGS += -DPENDSV_DEBUG
CFLAGS += -g -DPENDSV_DEBUG
COPT ?= -Og
# Disable text compression in debug builds
MICROPY_ROM_TEXT_COMPRESSION = 0
else
ifneq ($(LTO), 1)
CFLAGS += -g # always include debug info in the ELF, unless LTO is on
endif
COPT ?= -Os -DNDEBUG
endif