From c73c5fc90d0d40c86ea7690e23fa34409c39f4bf Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Sun, 9 Jun 2013 00:57:38 +0000 Subject: [PATCH] am33x-cm3: Enforce correct -march option Buildroot uses a normal ARM compiler to build the AM33X CM3 firmware (which runs on a Cortex-M3 processor), but Buildroot will have a default -march value that doesn't necessarily match the one needed for Cortex-M3, leading to build failures (gcc complains that the -mcpu=cortex-m3 option being passed is not compatible with the selected -march). Fix this by explicitly indicating -march=armv7-m. Fixes: http://autobuild.buildroot.net/results/db1/db13623b1701bfe678c302e8f88c7473cb2345f9/build-end.log Signed-off-by: Thomas Petazzoni Signed-off-by: Peter Korsgaard --- .../am33x-cm3-0001-fix-makefile.patch | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 package/am33x-cm3/am33x-cm3-0001-fix-makefile.patch diff --git a/package/am33x-cm3/am33x-cm3-0001-fix-makefile.patch b/package/am33x-cm3/am33x-cm3-0001-fix-makefile.patch new file mode 100644 index 000000000..77ba11c77 --- /dev/null +++ b/package/am33x-cm3/am33x-cm3-0001-fix-makefile.patch @@ -0,0 +1,26 @@ +Enforce correct -march option + +Buildroot uses a normal ARM compiler to build the AM33X CM3 firmware +(which runs on a Cortex-M3 processor), but Buildroot will have a +default -march value that doesn't necessarily match the one needed for +Cortex-M3, leading to build failures (gcc complains that the +-mcpu=cortex-m3 option being passed is not compatible with the +selected -march). + +Fix this by explicitly indicating -march=armv7-m. + +Signed-off-by: Thomas Petazzoni + +Index: b/Makefile +=================================================================== +--- a/Makefile ++++ b/Makefile +@@ -13,7 +13,7 @@ + BINDIR = bin + + INCLUDES = $(SRCDIR)/include +-CFLAGS =-mcpu=cortex-m3 -mthumb -nostdlib -Wall -g -I$(INCLUDES) ++CFLAGS =-march=armv7-m -mcpu=cortex-m3 -mthumb -nostdlib -Wall -g -I$(INCLUDES) + LDFLAGS =-nostartfiles -fno-exceptions -Tfirmware.ld + + EXECUTABLE=am335x-pm-firmware.elf