28 lines
922 B
Makefile
28 lines
922 B
Makefile
# Macros that allow testing for GCC flag existence
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try-run = $(shell set -e; \
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TMP="/tmp/SOPE-gcc-flags-check.$$$$.tmp"; \
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TMPO="/tmp/SOPE-gcc-flags-check.$$$$.o"; \
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if ($(1)) >/dev/null 2>&1; \
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then echo "$(2)"; \
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else echo "$(3)"; \
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fi; \
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rm -f "$$TMP" "$$TMPO")
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cc-option = $(call try-run,\
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$(CC) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
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# Use GCC level 2 optimization by default
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# Might be overridden below
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ADDITIONAL_OBJCFLAGS=-O2
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ifeq ($(debug),yes)
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ADDITIONAL_OBJCFLAGS=-O0
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else
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ADDITIONAL_OBJCFLAGS=-Wuninitialized
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endif
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# Ensure we store in the ELF files minimal debugging
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# information plus the compiler flags used; that can
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# be afterwards read with:
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# readelf -p .GCC.command.line /path/to/elf_file
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ADDITIONAL_OBJCFLAGS += -g $(call cc-option,-frecord-gcc-switches)
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