Added riscv_gcc.py

SLS_C/build_system/compilers/riscv_gcc.py

@@ -0,0 +1,180 @@
+#!/usr/bin/env python3
+"""
+RISC-V GCC compiler implementation for embedded targets.
+Used primarily for ESP32-C3 and other RISC-V microcontrollers.
+"""
+
+from pathlib import Path
+from typing import List, Optional
+from .base_gcc import BaseGCCCompiler
+from .base import CompileResult
+from build_system.utils import run
+
+
+class RISCVGCCCompiler(BaseGCCCompiler):
+    """RISC-V GCC compiler for embedded targets."""
+    
+    def __init__(self, executable: str = "riscv32-esp-elf-gcc", arch: str = "rv32imc", abi: str = "ilp32"):
+        """
+        Initialize RISC-V GCC compiler.
+        
+        Args:
+            executable: Compiler executable name
+            arch: Target architecture (e.g., "rv32imc", "rv32imac")
+            abi: Target ABI (e.g., "ilp32", "ilp32f")
+        """
+        super().__init__("RISC-V GCC", executable)
+        self.arch = arch
+        self.abi = abi
+    
+    def _get_arch_flags(self) -> List[str]:
+        """
+        Get architecture-specific flags.
+        
+        Returns:
+            List of architecture-specific compiler flags
+        """
+        return [
+            f"-march={self.arch}",
+            f"-mabi={self.abi}"
+        ]
+    
+    def compile(self,
+                source: Path,
+                output: Path,
+                flags: Optional[List[str]] = None,
+                defines: Optional[List[str]] = None,
+                include_dirs: Optional[List[Path]] = None,
+                dependency_file: Optional[Path] = None) -> CompileResult:
+        """
+        Compile a source file using RISC-V GCC.
+        
+        Args:
+            source: Source file path
+            output: Output object file path
+            flags: Additional compiler flags
+            defines: Preprocessor defines
+            include_dirs: Additional include directories
+            dependency_file: Path for dependency file (.d file)
+        
+        Returns:
+            CompileResult with object file and dependency file paths
+        
+        Raises:
+            subprocess.CalledProcessError: If compilation fails
+        """
+        # Prepend architecture-specific flags to user flags
+        arch_flags = self._get_arch_flags()
+        combined_flags = arch_flags + (flags or [])
+        
+        # Call parent compile with combined flags
+        return super().compile(
+            source=source,
+            output=output,
+            flags=combined_flags,
+            defines=defines,
+            include_dirs=include_dirs,
+            dependency_file=dependency_file
+        )
+    
+    def link(self,
+             objects: List[Path],
+             output: Path,
+             flags: Optional[List[str]] = None,
+             libraries: Optional[List[str]] = None,
+             library_dirs: Optional[List[Path]] = None) -> bool:
+        """
+        Link object files into an executable using RISC-V GCC.
+        
+        Args:
+            objects: List of object file paths
+            output: Output executable path
+            flags: Additional linker flags
+            libraries: Libraries to link against
+            library_dirs: Additional library search directories
+        
+        Returns:
+            True if linking succeeded
+        
+        Raises:
+            subprocess.CalledProcessError: If linking fails
+        """
+        # Prepend architecture-specific flags to user flags
+        arch_flags = self._get_arch_flags()
+        combined_flags = arch_flags + (flags or [])
+        
+        # Call parent link with combined flags
+        return super().link(
+            objects=objects,
+            output=output,
+            flags=combined_flags,
+            libraries=libraries,
+            library_dirs=library_dirs
+        )
+    
+    def set_arch(self, arch: str) -> None:
+        """
+        Set the target architecture.
+        
+        Args:
+            arch: Target architecture (e.g., "rv32imc", "rv32imac")
+        """
+        self.arch = arch
+    
+    def set_abi(self, abi: str) -> None:
+        """
+        Set the target ABI.
+        
+        Args:
+            abi: Target ABI (e.g., "ilp32", "ilp32f")
+        """
+        self.abi = abi
+
+
+def detect_riscv_gcc_compiler() -> Optional[RISCVGCCCompiler]:
+    """
+    Detect and return an available RISC-V GCC compiler.
+    
+    Returns:
+        RISCVGCCCompiler instance if found, None otherwise
+    """
+    from build_system.utils import which
+    
+    # Try to find RISC-V GCC (ESP32 toolchain first, then generic)
+    compilers = [
+        "riscv32-esp-elf-gcc",  # ESP-IDF toolchain
+        "riscv32-unknown-elf-gcc",  # Generic RISC-V toolchain
+        "riscv64-unknown-elf-gcc"   # 64-bit RISC-V toolchain
+    ]
+    
+    for compiler in compilers:
+        if which(compiler):
+            return RISCVGCCCompiler(compiler)
+    
+    return None
+
+
+def check_riscv_toolchain() -> bool:
+    """
+    Check if RISC-V toolchain is available.
+    
+    Returns:
+        True if RISC-V toolchain is found, False otherwise
+    """
+    from build_system.utils import check_tool
+    
+    # Check for ESP32-C3 toolchain first
+    if check_tool("riscv32-esp-elf-gcc"):
+        return True
+    
+    # Check for generic RISC-V toolchain
+    if check_tool("riscv32-unknown-elf-gcc"):
+        return True
+    
+    print("ERROR: RISC-V toolchain not found. Install one of:")
+    print("  ESP32-C3: Install ESP-IDF (https://docs.espressif.com/projects/esp-idf/)")
+    print("  Generic RISC-V:")
+    print("    Ubuntu/Debian: sudo apt install gcc-riscv64-unknown-elf")
+    print("    macOS: brew tap riscv/riscv && brew install riscv-tools")
+    
+    return False