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-rw-r--r--ports/sysdeps/arm/preconfigure50
1 files changed, 50 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/preconfigure b/ports/sysdeps/arm/preconfigure
new file mode 100644
index 0000000000..d98c167a95
--- /dev/null
+++ b/ports/sysdeps/arm/preconfigure
@@ -0,0 +1,50 @@
+case "$machine" in
+arm*)
+	base_machine=arm
+	case $config_os in
+	linux-gnueabi*)
+		# Lets ask the compiler which ARM family we've got
+		# Unfortunately it doesn't define any flags for implementations
+		# that you might pass to -mcpu or -mtune
+		# Note if you add patterns here you must ensure that
+		# an appropriate directory exists in sysdeps/arm
+		archcppflag=`echo "" |
+		$CC $CFLAGS $CPPFLAGS -E -dM - |
+		  grep __ARM_ARCH |
+		  sed -e 's/^#define //' -e 's/ .*//'`
+
+		case x$archcppflag in
+		x__ARM_ARCH_[89]*__)
+		  machine=armv7
+		  echo "Found compiler is configured for something newer than v7 - using v7"
+		  ;;
+
+		x__ARM_ARCH_7A__)
+		  machine=armv7
+		  echo "Found compiler is configured for $machine"
+		  ;;
+
+		x__ARM_ARCH_6T2__)
+		  machine=armv6t2
+		  echo "Found compiler is configured for $machine"
+		  ;;
+
+		*)
+		  machine=arm
+		  echo 2>&1 "arm/preconfigure: Did not find ARM architecture type; using default"
+		  ;;
+		esac
+
+		machine=arm/$machine
+		if [ "${CFLAGS+set}" != "set" ]; then
+		  CFLAGS="-g -O2"
+		fi
+		CFLAGS="$CFLAGS -fno-unwind-tables"
+		;;
+	*)
+		echo "Old ABI no longer supported" 2>&1
+		exit 1
+		;;
+	esac
+	;;
+esac