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scripts: Add makefile.emcc for building libpng with Emscripten

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Adapt makefile.clang to invoke the Emscripten toolchain utilities.

Co-authored-by: Kirk Roerig <mr.possoms@gmail.com>
Co-authored-by: Cosmin Truta <ctruta@gmail.com>
This commit is contained in:
Cosmin Truta 2022-09-14 21:50:02 +03:00
parent b60656ecdc
commit 3c67eeca51
1 changed files with 83 additions and 0 deletions
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# makefile for libpng using emscripten
# Copyright (C) 2000, 2014, 2019-2022 Cosmin Truta
# Copyright (C) 2021 Kirk Roerig
# Copyright (C) 2008, 2014 Glenn Randers-Pehrson
# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
#
# This code is released under the libpng license.
# For conditions of distribution and use, see the disclaimer
# and license in png.h
# Location of the zlib library and include files
ZLIBINC = ../zlib
ZLIBLIB = ../zlib
# Compiler, linker, lib and other tools
CC = emcc
LD = $(CC)
AR_RC = emar rcs
RANLIB = emranlib
CP = cp
RM_F = rm -f
CPPFLAGS = -I$(ZLIBINC) # -DPNG_DEBUG=5
CFLAGS = -O2 -Wall -Wextra -Wundef
LDFLAGS = -L$(ZLIBLIB)
PNGTEST_LDFLAGS = --preload-file=pngtest.png
LIBS = -lz -lm
# Pre-built configuration
# See scripts/pnglibconf.mak for more options
PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
# File lists
OBJS = png.o pngerror.o pngget.o pngmem.o pngpread.o \
pngread.o pngrio.o pngrtran.o pngrutil.o pngset.o \
pngtrans.o pngwio.o pngwrite.o pngwtran.o pngwutil.o
# Targets
all: static
pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
$(CP) $(PNGLIBCONF_H_PREBUILT) $@
.c.o:
$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
static: libpng.a pngtest
shared:
@echo This makefile cannot create shared libraries.
@false
libpng.a: $(OBJS)
$(AR_RC) $@ $(OBJS)
$(RANLIB) $@
test: pngtest
node ./pngtest
pngtest: pngtest.o libpng.a
$(LD) $(LDFLAGS) $(PNGTEST_LDFLAGS) -o $@ pngtest.o libpng.a $(LIBS)
clean:
$(RM_F) *.o libpng.a pngtest pngout.png pnglibconf.h
$(RM_F) pngtest.data pngtest.wasm
png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngtest.o: png.h pngconf.h pnglibconf.h