Enforce correct -march option
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Buildroot uses a normal ARM compiler to build the AM33X CM3 firmware
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(which runs on a Cortex-M3 processor), but Buildroot will have a
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default -march value that doesn't necessarily match the one needed for
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Cortex-M3, leading to build failures (gcc complains that the
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-mcpu=cortex-m3 option being passed is not compatible with the
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selected -march).
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Fix this by explicitly indicating -march=armv7-m.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Updated the patch to the latest version of the Makefile
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Signed-off-by: Anders Darander <anders@chargestorm.se>
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Index: b/Makefile
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===================================================================
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--- a/Makefile
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+++ b/Makefile
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@@ -13,7 +13,7 @@ SRCDIR = src
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BINDIR = bin
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INCLUDES = $(SRCDIR)/include
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-CFLAGS =-mcpu=cortex-m3 -mthumb -nostdlib -Wall -Wundef \
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+CFLAGS =-march=armv7-m -mcpu=cortex-m3 -mthumb -nostdlib -Wall -Wundef \
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-Werror-implicit-function-declaration -Wstrict-prototypes \
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-Wdeclaration-after-statement -fno-delete-null-pointer-checks \
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-Wempty-body -fno-strict-overflow -g -I$(INCLUDES) -O2
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