make: Configuration: support picolib

Switch to TOCK_LIBC variables rather than assuming newlib

Author: bradjc

Configuration.mk

@@ -257,10 +257,19 @@ else ifeq ($(CC_rv32_version_major),13)
 else
   NEWLIB_VERSION_rv32 := 4.3.0.20230120
 endif
-NEWLIB_VERSION_rv32i    := $(NEWLIB_VERSION_rv32)
-NEWLIB_VERSION_rv32imc  := $(NEWLIB_VERSION_rv32)
-NEWLIB_VERSION_rv32imac := $(NEWLIB_VERSION_rv32)
-NEWLIB_BASE_DIR_rv32 := $(TOCK_USERLAND_BASE_DIR)/lib/libtock-newlib-$(NEWLIB_VERSION_rv32)
+
+ifeq ($(PICOLIB),)
+  # Use newlib
+  TOCK_LIBC_FOLDER_rv32 := libtock-newlib-$(NEWLIB_VERSION_rv32)
+else
+  # Use picolib
+  TOCK_LIBC_FOLDER_rv32 := libtock-picolib-1.8.5
+endif
+
+TOCK_LIBC_FOLDER_rv32i    := $(TOCK_LIBC_FOLDER_rv32)
+TOCK_LIBC_FOLDER_rv32imc  := $(TOCK_LIBC_FOLDER_rv32)
+TOCK_LIBC_FOLDER_rv32imac := $(TOCK_LIBC_FOLDER_rv32)
+TOCK_LIBC_BASE_DIR_rv32   := $(TOCK_USERLAND_BASE_DIR)/lib/$(TOCK_LIBC_FOLDER_rv32)
 
 # Match compiler version to supported libtock-libc++ versions.
 ifeq ($(CC_rv32_version_major),10)
@@ -300,7 +309,7 @@ override CFLAGS_rv32imac += $(CFLAGS_rv32)
 # Set the base `CPPFLAGS` for all RISC-V variants based on the toolchain family.
 override CPPFLAGS_rv32 += \
       $(CPPFLAGS_toolchain_rv32) \
-      -isystem $(NEWLIB_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/include \
+      -isystem $(TOCK_LIBC_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/include \
       -isystem $(LIBCPP_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/include/c++/$(LIBCPP_VERSION_rv32) \
       -isystem $(LIBCPP_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/include/c++/$(LIBCPP_VERSION_rv32)/riscv64-unknown-elf
 
@@ -331,26 +340,26 @@ override WLFLAGS_rv32imc  += $(WLFLAGS_rv32)
 override WLFLAGS_rv32imac += $(WLFLAGS_rv32)
 
 override SYSTEM_LIBS_rv32i    += \
-      $(NEWLIB_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32i/ilp32/libc.a \
-      $(NEWLIB_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32i/ilp32/libm.a
+      $(TOCK_LIBC_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32i/ilp32/libc.a \
+      $(TOCK_LIBC_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32i/ilp32/libm.a
 
 override SYSTEM_LIBS_CXX_rv32i += \
       $(LIBCPP_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32i/ilp32/libstdc++.a \
       $(LIBCPP_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32i/ilp32/libsupc++.a \
       $(LIBCPP_BASE_DIR_rv32)/riscv/lib/gcc/riscv64-unknown-elf/$(LIBCPP_VERSION_rv32)/rv32i/ilp32/libgcc.a
 
 override SYSTEM_LIBS_rv32imc  += \
-      $(NEWLIB_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32im/ilp32/libc.a \
-      $(NEWLIB_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32im/ilp32/libm.a
+      $(TOCK_LIBC_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32im/ilp32/libc.a \
+      $(TOCK_LIBC_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32im/ilp32/libm.a
 
 override SYSTEM_LIBS_CXX_rv32imc += \
       $(LIBCPP_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32im/ilp32/libstdc++.a \
       $(LIBCPP_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32im/ilp32/libsupc++.a \
       $(LIBCPP_BASE_DIR_rv32)/riscv/lib/gcc/riscv64-unknown-elf/$(LIBCPP_VERSION_rv32)/rv32im/ilp32/libgcc.a
 
 override SYSTEM_LIBS_rv32imac += \
-      $(NEWLIB_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32imac/ilp32/libc.a \
-      $(NEWLIB_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32imac/ilp32/libm.a
+      $(TOCK_LIBC_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32imac/ilp32/libc.a \
+      $(TOCK_LIBC_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32imac/ilp32/libm.a
 
 override SYSTEM_LIBS_CXX_rv32imac += \
       $(LIBCPP_BASE_DIR_rv32)/riscv/riscv64-unknown-elf/lib/rv32imac/ilp32/libstdc++.a \
@@ -397,11 +406,20 @@ else ifeq ($(CC_cortex-m_version_major),13)
 else
   NEWLIB_VERSION_cortex-m := 4.3.0.20230120
 endif
-NEWLIB_VERSION_cortex-m0 := $(NEWLIB_VERSION_cortex-m)
-NEWLIB_VERSION_cortex-m3 := $(NEWLIB_VERSION_cortex-m)
-NEWLIB_VERSION_cortex-m4 := $(NEWLIB_VERSION_cortex-m)
-NEWLIB_VERSION_cortex-m7 := $(NEWLIB_VERSION_cortex-m)
-NEWLIB_BASE_DIR_cortex-m := $(TOCK_USERLAND_BASE_DIR)/lib/libtock-newlib-$(NEWLIB_VERSION_cortex-m)
+
+ifeq ($(PICOLIB),)
+  # Use newlib
+  TOCK_LIBC_FOLDER_cortex-m := libtock-newlib-$(NEWLIB_VERSION_cortex-m)
+else
+  # Use picolib
+  TOCK_LIBC_FOLDER_cortex-m := libtock-picolib-1.8.5
+endif
+
+TOCK_LIBC_FOLDER_cortex-m0  := $(TOCK_LIBC_FOLDER_cortex-m)
+TOCK_LIBC_FOLDER_cortex-m3  := $(TOCK_LIBC_FOLDER_cortex-m)
+TOCK_LIBC_FOLDER_cortex-m4  := $(TOCK_LIBC_FOLDER_cortex-m)
+TOCK_LIBC_FOLDER_cortex-m7  := $(TOCK_LIBC_FOLDER_cortex-m)
+TOCK_LIBC_BASE_DIR_cortex-m := $(TOCK_USERLAND_BASE_DIR)/lib/$(TOCK_LIBC_FOLDER_cortex-m)
 
 # Match compiler version to supported libtock-libc++ versions.
 ifeq ($(CC_cortex-m_version_major),10)
@@ -442,7 +460,7 @@ override CPPFLAGS_cortex-m += \
       -msingle-pic-base\
       -mpic-register=r9\
       -mno-pic-data-is-text-relative\
-      -isystem $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/include\
+      -isystem $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/include\
       -isystem $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/include/c++/$(LIBCPP_VERSION_cortex-m)\
       -isystem $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/include/c++/$(LIBCPP_VERSION_cortex-m)/arm-none-eabi
 
@@ -461,35 +479,35 @@ override CPPFLAGS_cortex-m7 += $(CPPFLAGS_cortex-m) \
       -mcpu=cortex-m7
 
 override SYSTEM_LIBS_cortex-m0 += \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v6-m/nofp/libc.a \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v6-m/nofp/libm.a
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v6-m/nofp/libc.a \
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v6-m/nofp/libm.a
 
 override SYSTEM_LIBS_CXX_cortex-m0 += \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v6-m/nofp/libstdc++.a \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v6-m/nofp/libsupc++.a \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/lib/gcc/arm-none-eabi/$(LIBCPP_VERSION_cortex-m)/thumb/v6-m/nofp/libgcc.a
 
 override SYSTEM_LIBS_cortex-m3 += \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7-m/nofp/libc.a \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7-m/nofp/libm.a
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7-m/nofp/libc.a \
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7-m/nofp/libm.a
 
 override SYSTEM_LIBS_CXX_cortex-m3 += \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7-m/nofp/libstdc++.a \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7-m/nofp/libsupc++.a \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/lib/gcc/arm-none-eabi/$(LIBCPP_VERSION_cortex-m)/thumb/v7-m/nofp/libgcc.a
 
 override SYSTEM_LIBS_cortex-m4 += \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libc.a \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libm.a
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libc.a \
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libm.a
 
 override SYSTEM_LIBS_CXX_cortex-m4 += \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libstdc++.a \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libsupc++.a \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/lib/gcc/arm-none-eabi/$(LIBCPP_VERSION_cortex-m)/thumb/v7e-m/nofp/libgcc.a
 
 override SYSTEM_LIBS_cortex-m7 += \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libc.a \
-      $(NEWLIB_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libm.a
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libc.a \
+      $(TOCK_LIBC_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libm.a
 
 override SYSTEM_LIBS_CXX_cortex-m7 += \
       $(LIBCPP_BASE_DIR_cortex-m)/arm/arm-none-eabi/lib/thumb/v7e-m/nofp/libstdc++.a \