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108 lines
3.8 KiB
Makefile
108 lines
3.8 KiB
Makefile
#-----------------------------------------------------------------------------#
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# Makefile.DLLs, version 0.4.
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# Contributed by Fergus Henderson.
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# This Makefile contains rules for creating DLLs on Windows using gnu-win32.
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#-----------------------------------------------------------------------------#
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# This rule creates a `.def' file, which lists the symbols that are exported
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# from the DLL. We use `nm' to get a list of all the exported text (`T')
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# symbols and data symbols -- including uninitialized data (`B'),
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# initialized data (`D'), read-only data (`R'), and common blocks (`C').
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%.def: %.a
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echo EXPORTS > $@
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nm $< | grep '^........ [BCDRT] _' | sed 's/[^_]*_//' >> $@
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# We need to use macros to access global data:
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# the user of the DLL must refer to `foo' as `(*__imp_foo)'.
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# This rule creates a `_globals.h' file, which contains macros
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# for doing this.
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SYM_PREFIX = $(firstword $(SYM_PREFIX-$*) $*)
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DLL_MACRO = $(SYM_PREFIX)_USE_DLL
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IMP_MACRO = $(SYM_PREFIX)_IMP
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GLOBAL_MACRO = $(SYM_PREFIX)_GLOBAL
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%_globals.h: %.a
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echo "/* automatically generated by Makefile.DLLs */" > $@
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echo "#if defined(__GNUC__) && defined(_WIN32) \\" >> $@
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echo " && defined($(DLL_MACRO))" >> $@
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echo "# define $(IMP_MACRO)(name) __imp_##name" >> $@
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echo "# define $(GLOBAL_MACRO)(name) (*$(IMP_MACRO)(name))" >> $@
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echo "#else" >> $@
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echo "# define $(GLOBAL_MACRO)(name) name" >> $@
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echo "#endif" >> $@
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echo "" >> $@
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for sym in `nm $< | grep '^........ [BCDR] _' | sed 's/[^_]*_//'`; do \
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echo "#define $$sym $(GLOBAL_MACRO)($$sym)" >> $@; \
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done
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# This rule creates the export object file (`foo.exp') which contains the
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# jump table array; this export object file becomes part of the DLL.
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# This rule also creates the import library (`foo_dll.a') which contains small
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# stubs for all the functions exported by the DLL which jump to them via the
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# jump table. Executables that will use the DLL must be linked against this
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# stub library.
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%.exp %_dll.a : %.def
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dlltool $(DLLTOOLFLAGS) $(DLLTOOLFLAGS-$*) \
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--def $< \
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--dllname $*.dll \
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--output-exp $*.exp \
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--output-lib $*_dll.a
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# The `sed' commands below are to convert DOS-style `C:\foo\bar'
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# pathnames into Unix-style `//c/foo/bar' pathnames.
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CYGWIN32_LIBS = $(shell echo \
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-L`dirname \`gcc -print-file-name=libgcc.a | \
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sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
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-L`dirname \`gcc -print-file-name=libcygwin.a | \
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sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
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-L`dirname \`gcc -print-file-name=libkernel32.a | \
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sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
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-lgcc -lcygwin -lkernel32 -lgcc)
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RELOCATABLE=yes
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ifeq "$(strip $(RELOCATABLE))" "yes"
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# to create relocatable DLLs, we need to do two passes
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%.dll: %.exp %.a dll_fixup.o dll_init.o
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$(LD) $(LDFLAGS) $(LDFLAGS-$*) --dll -o $*.base \
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-e _dll_entry@12 dll_init.o \
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dll_fixup.o $*.exp $*.a \
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$(LDLIBS) $(LDLIBS-$*) \
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$(CYGWIN32_LIBS)
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$(LD) $(LDFLAGS) $(LDFLAGS-$*) --dll --base-file $*.base -o $@ \
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-e _dll_entry@12 dll_init.o \
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dll_fixup.o $*.exp $*.a \
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$(LDLIBS) $(LDLIBS-$*) \
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$(CYGWIN32_LIBS)
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rm -f $*.base
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else
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%.dll: %.exp %.a dll_fixup.o dll_init.o
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$(LD) $(LDFLAGS) $(LDFLAGS-$*) --dll -o $@ \
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-e _dll_entry@12 dll_init.o \
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dll_fixup.o $*.exp $*.a \
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$(LDLIBS) $(LDLIBS-$*) \
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$(CYGWIN32_LIBS)
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endif
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# This black magic piece of assembler needs to be linked in in order to
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# properly terminate the list of imported DLLs.
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dll_fixup.s:
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echo '.section .idata$$3' > dll_fixup.s
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echo '.long 0,0,0,0, 0,0,0,0' >> dll_fixup.s
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# This bit is necessary to provide an initialization function for the DLL.
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dll_init.c:
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echo '__attribute__((stdcall))' > dll_init.c
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echo 'int dll_entry(int handle, int reason, void *ptr)' >> dll_init.c
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echo '{return 1; }' >> dll_init.c
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dont_throw_away: dll_fixup.o dll_init.o
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