Copy RISC-V 64 support to Mes compatible TinyCC

Makefile

@@ -78,6 +78,7 @@ NATIVE_DEFINES_$(CONFIG_arm_eabihf) += -DTCC_ARM_EABI -DTCC_ARM_HARDFLOAT
 NATIVE_DEFINES_$(CONFIG_arm_eabi) += -DTCC_ARM_EABI
 NATIVE_DEFINES_$(CONFIG_arm_vfp) += -DTCC_ARM_VFP
 NATIVE_DEFINES_$(CONFIG_arm64) += -DTCC_TARGET_ARM64
+NATIVE_DEFINES_$(CONFIG_riscv64) += -DTCC_TARGET_RISCV64
 NATIVE_DEFINES += $(NATIVE_DEFINES_yes)
 
 ifeq ($(INCLUDED),no)
@@ -91,11 +92,11 @@ TCCDOCS = tcc.1 tcc-doc.html tcc-doc.info
 all: $(PROGS) $(TCCLIBS) $(TCCDOCS)
 
 # cross compiler targets to build
-TCC_X = i386 x86_64 i386-win32 x86_64-win32 x86_64-osx arm arm64 arm-wince c67
+TCC_X = i386 x86_64 i386-win32 x86_64-win32 x86_64-osx arm arm64 arm-wince c67 riscv64
 # TCC_X += arm-fpa arm-fpa-ld arm-vfp arm-eabi
 
 # cross libtcc1.a targets to build
-LIBTCC1_X = i386 x86_64 i386-win32 x86_64-win32 x86_64-osx arm arm64 arm-wince
+LIBTCC1_X = i386 x86_64 i386-win32 x86_64-win32 x86_64-osx arm arm64 arm-wince riscv64
 
 PROGS_CROSS = $(foreach X,$(TCC_X),$X-tcc$(EXESUF))
 LIBTCC1_CROSS = $(foreach X,$(LIBTCC1_X),libtcc1-$X.a)
@@ -132,6 +133,7 @@ DEF-arm-vfp     = -DTCC_TARGET_ARM -DTCC_ARM_VFP
 DEF-arm-eabi    = -DTCC_TARGET_ARM -DTCC_ARM_VFP -DTCC_ARM_EABI
 DEF-arm-eabihf  = -DTCC_TARGET_ARM -DTCC_ARM_VFP -DTCC_ARM_EABI -DTCC_ARM_HARDFLOAT
 DEF-arm         = $(DEF-arm-eabihf)
+DEF-riscv64     = -DTCC_TARGET_RISCV64
 DEF-$(NATIVE_TARGET) = $(NATIVE_DEFINES)
 
 DEFINES += $(DEF-$T) $(DEF-all)
@@ -165,6 +167,7 @@ arm_FILES = $(CORE_FILES) arm-gen.c arm-link.c arm-asm.c
 arm-wince_FILES = $(arm_FILES) tccpe.c
 arm64_FILES = $(CORE_FILES) arm64-gen.c arm64-link.c
 c67_FILES = $(CORE_FILES) c67-gen.c c67-link.c tcccoff.c
+riscv64_FILES = $(CORE_FILES) riscv64-gen.c riscv64-link.c riscv64-asm.c
 
 # libtcc sources
 LIBTCC_SRC = $(filter-out tcc.c tcctools.c,$(filter %.c,$($T_FILES)))

configure

@@ -198,6 +198,9 @@ case "$cpu" in
   s390)
     cpu="s390"
   ;;
+  riscv64)
+    cpu="riscv64"
+  ;;
   *)
     echo "Unsupported CPU"
     exit 1
@@ -340,7 +343,7 @@ if test -z "$cross_prefix" ; then
       fi
 
       if test -z "$triplet"; then
-        if test $cpu = "x86_64" -o $cpu = "arm64" ; then
+        if test $cpu = "x86_64" -o $cpu = "arm64" -o $cpu = "riscv64" ; then
           if test -f "/usr/lib64/crti.o" ; then
             tcc_lddir="lib64"
           fi