platform/wavelet3d/host_sw: add picolibc

4 files changed, 30 insertions, 0 deletions

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d84429f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "platform/wavelet3d/host_sw/picolibc"]
+	path = platform/wavelet3d/host_sw/picolibc
+	url = https://github.com/picolibc/picolibc
diff --git a/flake.nix b/flake.nix
index bdfd21e..2432421 100644
--- a/flake.nix
+++ b/flake.nix
@@ -138,6 +138,8 @@
             gnumake
             gtkwave
             kermit
+            meson
+            ninja
             lcov
             pkg-config
             (python3.withPackages (py: with py; [
diff --git a/platform/wavelet3d/host_sw/cross-riscv32-none-elf.txt b/platform/wavelet3d/host_sw/cross-riscv32-none-elf.txt
new file mode 100644
index 0000000..747bcac
--- /dev/null
+++ b/platform/wavelet3d/host_sw/cross-riscv32-none-elf.txt
@@ -0,0 +1,25 @@
+[binaries]
+# Meson 0.53.2 doesn't use any cflags when doing basic compiler tests,
+# so we have to add -nostdlib to the compiler configuration itself or
+# early compiler tests will fail. This can be removed when picolibc
+# requires at least version 0.54.2 of meson.
+c = ['riscv32-none-elf-gcc', '-nostdlib']
+ar = 'riscv32-none-elf-ar'
+as = 'riscv32-none-elf-as'
+strip = 'riscv32-none-elf-strip'
+nm = 'riscv32-none-elf-nm'
+
+[host_machine]
+system = 'unknown'
+cpu_family = 'riscv32'
+cpu = 'riscv'
+endian = 'little'
+
+[properties]
+# default multilib is 64 bit
+c_args = [ '-march=rv32imfc', '-mabi=ilp32f', '-mcmodel=medlow', '-fno-common' ]
+skip_sanity_check = true
+default_flash_addr = '0x00000000'
+default_flash_size = '0x04000000'
+default_ram_addr   = '0x04000000'
+default_ram_size   = '0x1c000000'
diff --git a/platform/wavelet3d/host_sw/picolibc b/platform/wavelet3d/host_sw/picolibc
new file mode 160000
+Subproject 695583c3b7dc461204948db5c8390e967b526a2