Scott Duensing
847db7586b
Add comprehensive README covering architecture, API usage, build instructions, tested drivers, binary patching details, and DGROUP layout. Expand file header comments in all library sources and headers to document module responsibilities, data flow, and key constraints. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
53 lines
1.8 KiB
Makefile
53 lines
1.8 KiB
Makefile
# ============================================================================
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# Makefile for win31drv - Windows 3.x display driver library for DJGPP/DOS
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#
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# Builds libwindrv.a from: log.c neload.c thunk.c winstub.c windrv.c
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# windrv.c is compiled with -fno-gcse (see WINDRV_CFLAGS below).
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# ============================================================================
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DJGPP_PREFIX ?= $(HOME)/djgpp/djgpp
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CC = $(DJGPP_PREFIX)/bin/i586-pc-msdosdjgpp-gcc
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AR = $(DJGPP_PREFIX)/bin/i586-pc-msdosdjgpp-ar
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CFLAGS = -Wall -Wextra -O2 -std=gnu99 -I.
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# With -O2 GCSE enabled, GCC's code layout for windrv.c places stack
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# locals and register spills at addresses that get corrupted during
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# 16-bit driver calls via thunkCall16, causing wrong values in drawing
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# parameters. Disabling GCSE changes the layout enough to avoid the
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# issue. Only windrv.c is affected (it has the drawing functions that
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# call thunkCall16 with interleaved parameter setup).
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WINDRV_CFLAGS = $(CFLAGS) -fno-gcse
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# DJGPP binutils need libfl.so.2 which may not be installed system-wide
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export LD_LIBRARY_PATH := $(realpath ../tools/lib):$(LD_LIBRARY_PATH)
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OBJDIR = obj
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SRCS = log.c neload.c thunk.c winstub.c windrv.c
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OBJS = $(addprefix $(OBJDIR)/,$(SRCS:.c=.o))
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LIB = libwindrv.a
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.PHONY: all clean
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all: $(LIB)
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$(LIB): $(OBJS)
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$(AR) rcs $@ $^
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$(OBJDIR)/%.o: %.c | $(OBJDIR)
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$(CC) $(CFLAGS) -c -o $@ $<
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$(OBJDIR):
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mkdir -p $(OBJDIR)
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# Dependencies
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$(OBJDIR)/log.o: log.c log.h
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$(OBJDIR)/neload.o: neload.c neload.h neformat.h wintypes.h log.h
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$(OBJDIR)/thunk.o: thunk.c thunk.h wintypes.h log.h
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$(OBJDIR)/winstub.o: winstub.c winstub.h thunk.h wintypes.h log.h
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$(OBJDIR)/windrv.o: windrv.c windrv.h wintypes.h winddi.h neformat.h neload.h thunk.h winstub.h log.h
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$(CC) $(WINDRV_CFLAGS) -c -o $@ $<
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clean:
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-rm -rf $(OBJDIR) $(LIB)
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