#
# Blaise — An Object Pascal Compiler
# Copyright (c) 2026 Graeme Geldenhuys
# SPDX-License-Identifier: Apache-2.0 WITH Swift-exception
# Licensed under the Apache License v2.0 with Runtime Library Exception.
# See LICENSE file in the project root for full license terms.
#
CC      = gcc
CFLAGS  = -O2 -Wall -Wextra -std=c11

SRC_DIR     = src/main/c
PAS_SRC_DIR = src/main/pascal
OBJ_DIR     = target
LIB         = $(OBJ_DIR)/blaise_rtl.a

# Where the compiler binary lives — install copies the RTL there so the
# driver finds it automatically next to itself.
COMPILER_BIN = ../compiler/target
BLAISE       = $(COMPILER_BIN)/blaise
QBE          = ../vendor/qbe/qbe

# C sources (blaise_str.pas replaces blaise_str.c; blaise_str_fmt.c keeps
# the variadic _StringFormat which cannot be expressed in Pascal).
C_SRCS = $(SRC_DIR)/blaise_arc_class.c \
         $(SRC_DIR)/blaise_exc.c \
         $(SRC_DIR)/blaise_weak.c \
         $(SRC_DIR)/blaise_str_fmt.c \
         $(SRC_DIR)/blaise_io.c \
         $(SRC_DIR)/blaise_process.c \
         $(SRC_DIR)/blaise_sys_posix.c
C_OBJS = $(patsubst $(SRC_DIR)/%.c,$(OBJ_DIR)/%.o,$(C_SRCS))

# Pascal RTL units compiled via the Blaise compiler.
# Each unit is compiled by a thin driver program; the program section is
# stripped from the IR so only the unit's exported functions are archived.
PAS_OBJS = $(OBJ_DIR)/blaise_str.o \
           $(OBJ_DIR)/blaise_arc.o \
           $(OBJ_DIR)/blaise_sys.o

OBJS = $(C_OBJS) $(PAS_OBJS)

.PHONY: all install clean

all: $(LIB)

$(LIB): $(OBJS)
	ar rcs $@ $^

# --- C rules ---
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
	@mkdir -p $(OBJ_DIR)
	$(CC) $(CFLAGS) -c -o $@ $<

# --- Pascal unit rules ---
# Compile via a build driver, strip everything from '# Generated by Blaise'
# onward (the program section), assemble the unit-only IR, then compile to .o.
$(OBJ_DIR)/blaise_str.ssa: $(PAS_SRC_DIR)/blaise_str.pas \
                            $(PAS_SRC_DIR)/blaise_str_build_driver.pas
	@mkdir -p $(OBJ_DIR)
	$(BLAISE) --source $(PAS_SRC_DIR)/blaise_str_build_driver.pas \
	          --unit-path $(PAS_SRC_DIR) \
	          --emit-ir \
	| sed '/^# Generated by Blaise/,$$d' > $@

$(OBJ_DIR)/blaise_str.s: $(OBJ_DIR)/blaise_str.ssa
	$(QBE) -o $@ $<

$(OBJ_DIR)/blaise_str.o: $(OBJ_DIR)/blaise_str.s
	$(CC) -c -o $@ $<

$(OBJ_DIR)/blaise_arc.ssa: $(PAS_SRC_DIR)/blaise_arc.pas \
                            $(PAS_SRC_DIR)/blaise_arc_build_driver.pas
	@mkdir -p $(OBJ_DIR)
	$(BLAISE) --source $(PAS_SRC_DIR)/blaise_arc_build_driver.pas \
	          --unit-path $(PAS_SRC_DIR) \
	          --emit-ir \
	| sed '/^# Generated by Blaise/,$$d' > $@

$(OBJ_DIR)/blaise_arc.s: $(OBJ_DIR)/blaise_arc.ssa
	$(QBE) -o $@ $<

$(OBJ_DIR)/blaise_arc.o: $(OBJ_DIR)/blaise_arc.s
	$(CC) -c -o $@ $<

$(OBJ_DIR)/blaise_sys.ssa: $(PAS_SRC_DIR)/blaise_sys.pas \
                            $(PAS_SRC_DIR)/blaise_sys_build_driver.pas
	@mkdir -p $(OBJ_DIR)
	$(BLAISE) --source $(PAS_SRC_DIR)/blaise_sys_build_driver.pas \
	          --unit-path $(PAS_SRC_DIR) \
	          --emit-ir \
	| sed '/^# Generated by Blaise/,$$d' > $@

$(OBJ_DIR)/blaise_sys.s: $(OBJ_DIR)/blaise_sys.ssa
	$(QBE) -o $@ $<

$(OBJ_DIR)/blaise_sys.o: $(OBJ_DIR)/blaise_sys.s
	$(CC) -c -o $@ $<

install: $(LIB)
	@mkdir -p $(COMPILER_BIN)
	cp $(LIB) $(COMPILER_BIN)/blaise_rtl.a
	@echo "Installed blaise_rtl.a → $(COMPILER_BIN)/blaise_rtl.a"

clean:
	rm -f $(OBJ_DIR)/*.o $(OBJ_DIR)/*.s $(OBJ_DIR)/*.ssa $(LIB)