diff options
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | platform/qemu/virt/config.mk | 13 | ||||
| -rw-r--r-- | platform/template/config.mk | 2 |
3 files changed, 16 insertions, 2 deletions
@@ -116,6 +116,9 @@ endif AS = $(CC) DTC = dtc +# Guess the compillers xlen +OPENSBI_CC_XLEN = `expr substr \`$(CC) -dumpmachine\` 6 2` + # Setup compilation commands flags CFLAGS = -g -Wall -Werror -nostdlib -fno-strict-aliasing -O2 CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls diff --git a/platform/qemu/virt/config.mk b/platform/qemu/virt/config.mk index 1ee66d0..5931d0e 100644 --- a/platform/qemu/virt/config.mk +++ b/platform/qemu/virt/config.mk @@ -9,8 +9,17 @@ # Compiler flags platform-cppflags-y = -platform-cflags-y =-mabi=lp64 -march=rv64imafdc -mcmodel=medany -platform-asflags-y =-mabi=lp64 -march=rv64imafdc -mcmodel=medany +# If we know the compillers xlen use it below +ifeq ($(OPENSBI_CC_XLEN), 32) + platform-cflags-y =-mabi=ilp$(OPENSBI_CC_XLEN) -march=rv$(OPENSBI_CC_XLEN)imafdc + platform-asflags-y =-mabi=ilp$(OPENSBI_CC_XLEN) -march=rv$(OPENSBI_CC_XLEN)imafdc +endif +ifeq ($(OPENSBI_CC_XLEN), 64) + platform-cflags-y =-mabi=lp$(OPENSBI_CC_XLEN) -march=rv$(OPENSBI_CC_XLEN)imafdc + platform-asflags-y =-mabi=lp$(OPENSBI_CC_XLEN) -march=rv$(OPENSBI_CC_XLEN)imafdc +endif +platform-cflags-y += -mcmodel=medany +platform-asflags-y += -mcmodel=medany platform-ldflags-y = # Common drivers to enable diff --git a/platform/template/config.mk b/platform/template/config.mk index b1457da..21aa6d6 100644 --- a/platform/template/config.mk +++ b/platform/template/config.mk @@ -12,6 +12,8 @@ platform-cppflags-y = # -mabi=lp64 -march=rv64imafdc -mcmodel=medany # For a 32 bits platform, this will likely be: # -mabi=lp32 -march=rv32imafdc -mcmodel=medlow +# You can also use the Makefile variable OPENSBI_CC_XLEN for the xlen +# See the QEMU virt machine for an example of this platform-cflags-y = -mabi=lp64 -march=rv64imafdc -mcmodel=medany platform-asflags-y = -mabi=lp64 -march=rv64imafdc -mcmodel=medany |