[PATCH v2 2/7] Makefile: sensible default value for OPENSBI_CC_XLEN.

[Benedikt Freisen]

If guessing the compiler's XLEN fails, use 64 rather than garbage.
The previous behavior could silently break e.g. OPENSBI_CC_SUPPORT_VECTOR
when cross-compiling with a system's native clang.

Signed-off-by: Benedikt Freisen <b.freisen at gmx.net>
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index 398eabe..afcc544 100644
--- a/Makefile
+++ b/Makefile
@@ -151,6 +151,12 @@ endif
 
 # Guess the compiler's XLEN
 OPENSBI_CC_XLEN := $(shell TMP=`$(CC) $(CLANG_TARGET) -dumpmachine | sed 's/riscv\([0-9][0-9]\).*/\1/'`; echo $${TMP})
+# If guessing XLEN fails, default to 64
+ifneq ($(OPENSBI_CC_XLEN),32)
+  ifneq ($(OPENSBI_CC_XLEN),64)
+    OPENSBI_CC_XLEN = 64
+  endif
+endif
 
 # Guess the compiler's ABI and ISA
 ifneq ($(CC_IS_CLANG),y)
-- 
2.51.1