Cross-compilation using MingW
Author
Hello!
Recently I've started using MingW for cross-compilation of linux and windows binaries for our project. However, cross-compilation of Angelscript posed a few problems:
1) Makefile for MingW has its binaries hardcoded to g++ and ar, making it impossible to compile a windows binary in linux. My suggestion is to slightly modify the makefile to use variables in this manner:
-CXX = g++
+CXX ?= g++
+AR ?= ar
...
- ar rcs $(BIN) $(OBJ)
+ $(AR) rcs $(BIN) $(OBJ)
That'll keep the current behavior but simultaneously allow cross-compilation in this manner:
CC=i586-mingw32msvc-gcc AR=i586-mingw32msvc-ar make
2) GnuC and MingW makefiles produce the same library file for all platforms, so running one after another may produce incorrect results. I worked around this by removing libangelscript.a before launching 'make'. but a platform/OS dependent suffix would be a better solution.
Author
Sure (the angelscript version we're using is a bit outdated though):
# Angelscript MingW makefile# Type 'make' then 'make install' to complete the installation of the libraryCXX ?= g++AR ?= arCXXFLAGS = -ggdbSRCDIR = ../../sourceOBJDIR = objSRCNAMES = as_arrayobject.cpp as_atomic.cpp as_builder.cpp as_bytecode.cpp as_callfunc.cpp as_callfunc_mips.cpp as_callfunc_ppc_64.cpp as_callfunc_ppc.cpp as_callfunc_sh4.cpp as_callfunc_x86.cpp as_compiler.cpp as_configgroup.cpp as_context.cpp as_datatype.cpp as_generic.cpp as_gc.cpp as_memory.cpp as_module.cpp as_objecttype.cpp as_outputbuffer.cpp as_parser.cpp as_restore.cpp as_scriptcode.cpp as_scriptengine.cpp as_scriptfunction.cpp as_scriptnode.cpp as_scriptstruct.cpp as_string.cpp as_string_util.cpp as_thread.cpp as_tokenizer.cpp as_typeinfo.cpp as_variablescope.cpp OBJ = $(addprefix $(OBJDIR)/, $(notdir $(SRCNAMES:.cpp=.o)))BIN = ../../lib/libangelscript.aOBJ_D = $(subst /,\,$(OBJ))BIN_D = $(subst /,\,$(BIN))DELETER = del /fCOPIER = copy /yINCLUDEFILES_D = ..\..\include\angelscript.hUNINSTALLFILES_D = $(MINGDIR)\lib\libangelscript.a $(MINGDIR)\include\angelscript.hall: $(BIN)$(BIN): $(OBJ) $(AR) rcs $(BIN) $(OBJ) @echo ------------------------------------------------------------------- @echo Done. Now type 'make install' to install the library on your MinGW.$(OBJDIR)/%.o: $(SRCDIR)/%.cpp $(CXX) $(CXXFLAGS) -o $@ -c $<clean: $(DELETER) $(OBJ_D) $(BIN_D)install: $(BIN) $(COPIER) $(BIN_D) $(MINGDIR)\lib $(COPIER) $(INCLUDEFILES_D) $(MINGDIR)\include @echo ------------------------------------------------------------------- @echo Angelscript library installed. Enjoy!uninstall: $(DELETER) $(UNINSTALLFILES_D) @echo ------------------------------------------------------------------- @echo Angelscript library uninstalled..PHONY: all clean install uninstall
You should look into using CMake (http://www.cmake.org/) for your build scripts. It can generate MSVC (v6-10), MingW, GNU C, CodeBlocks, etc for you, and it does support cross-compiling. If you are interested I can write the CMake files for you and you can give it a try.
-- Jeremy
-- Jeremy
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