Annotation of OpenXM_contrib/pari/config/Makefile.DLLs, Revision 1.1
1.1 ! maekawa 1: # This makefile is freely available from the website of Cygnus Solutions
! 2: # at http://www.cygnus.com on the cygwin32 home page. The author is
! 3: # Fergus Henderson <fjh@cs.mu.oz.au> http://www.cs.mu.oz.au/~fjh
! 4: # Before using this file you should read and understand the documentation
! 5: # on the Cygnus website.
! 6: # This file comes with a suitable disclaimer; i.e.,
! 7: # This is provided AS IS, with absolutely NO WARRANTY EITHER EXPRESSED
! 8: # OR IMPLIED.
! 9:
! 10: #-----------------------------------------------------------------------------#
! 11:
! 12: # Makefile.DLLs, version 0.7.
! 13:
! 14: # This Makefile contains rules for creating DLLs on Windows using gnu-win32.
! 15:
! 16: #-----------------------------------------------------------------------------#
! 17:
! 18: # The SYM_PREFIX is used as a prefix for the symbols in the files
! 19: # that this makefiles automatically generates.
! 20: #
! 21: # The default SYM_PREFIX for libfoo.dll is `libfoo'.
! 22: # But you can override this by setting `SYM_PREFIX-libfoo = blah'.
! 23:
! 24: SYM_PREFIX = $(firstword $(SYM_PREFIX-$*) $*)
! 25:
! 26: GUARD_MACRO = $(SYM_PREFIX)_GLOBALS_H
! 27: DEFINE_DLL_MACRO = $(SYM_PREFIX)_DEFINE_DLL
! 28: USE_DLL_MACRO = $(SYM_PREFIX)_USE_DLL
! 29: IMP_MACRO = $(SYM_PREFIX)_IMP
! 30: GLOBAL_MACRO = $(SYM_PREFIX)_GLOBAL
! 31: IMPURE_PTR = $(SYM_PREFIX)_impure_ptr
! 32:
! 33: # This rule creates a `.def' file, which lists the symbols that are exported
! 34: # from the DLL. We use `nm' to get a list of all the exported text (`T')
! 35: # symbols and data symbols -- including uninitialized data (`B'),
! 36: # initialized data (`D'), read-only data (`R'), and common blocks (`C').
! 37: # We also export `_impure_ptr', suitably renamed, so that the
! 38: # main program can do the necessary initialization of the DLL's _impure_ptr.
! 39: # (Since there can be more than one DLL, we must rename _impure_ptr as
! 40: # $(SYM_PREFIX)_impure_ptr to prevent name collisions.)
! 41: %.def: %.a
! 42: echo EXPORTS > $@
! 43: echo $(IMPURE_PTR) = _impure_ptr >> $@
! 44: nm $< | sed -n '/^........ [BCDRT] _/s/[^_]*_//p' >> $@
! 45:
! 46: # We need to use macros to access global data:
! 47: # the user of the DLL must refer to `bar' as `(*__imp_bar)'.
! 48: # This rule creates a pair of files `foo_dll.h' and `foo_globals.h'
! 49: # which contains macros for doing this.
! 50: #
! 51: # The DLL may also contain some references to _impure_ptr
! 52: # (e.g. stdin is defined as a macro which expands to _impure_ptr.stdin).
! 53: # We need to provide a definition for this (otherwise it will link in
! 54: # the definition in libccrt.o, which causes lots of problems,
! 55: # eventually leading to undefined symbol `WinMain').
! 56: # The DLL's entry function (below) will initialize the _impure_ptr variable
! 57: # in the DLL so that they point to the main program's reent_data struct.
! 58:
! 59: %_dll.h:
! 60: echo "/* automatically generated by Makefile.DLLs */" > $@
! 61: echo "#ifndef $(GUARD_MACRO)" >> $@
! 62: echo "#define $(GUARD_MACRO)" >> $@
! 63: echo "" >> $@
! 64: echo "#if defined(__GNUC__) && defined(__CYGWIN32__)" >> $@
! 65: echo " #if defined($(USE_DLL_MACRO))" >> $@
! 66: echo " #define $(IMP_MACRO)(name) __imp_##name" >> $@
! 67: echo " #define $(GLOBAL_MACRO)(name) (*$(IMP_MACRO)(name))" >> $@
! 68: echo " #include \"$*_globals.h\"" >> $@
! 69: echo " #endif /* $(USE_DLL_MACRO) */" >> $@
! 70: echo "#endif /* __GNUC__ && __CYGWIN32__ */" >> $@
! 71: echo "" >> $@
! 72: echo "#endif /* $(GUARD_MACRO) */" >> $@
! 73:
! 74: %_globals.h: %.a
! 75: echo "/* automatically generated by Makefile.DLLs */" > $@
! 76: for sym in $(IMPURE_PTR) \
! 77: `nm $< | grep '^........ [BCDR] _' | sed 's/[^_]*_//'`; \
! 78: do \
! 79: echo "#define $$sym $(GLOBAL_MACRO)($$sym)" >> $@; \
! 80: done
! 81:
! 82: %_dll.c:
! 83: echo "/* automatically generated by Makefile.DLLs */" > $@
! 84: echo "void *_impure_ptr;" >> $@
! 85:
! 86: # This rule creates the export object file (`foo.exp') which contains the
! 87: # jump table array; this export object file becomes part of the DLL.
! 88: # This rule also creates the import library (`foo_dll.a') which contains small
! 89: # stubs for all the functions exported by the DLL which jump to them via the
! 90: # jump table. Executables that will use the DLL must be linked against this
! 91: # stub library.
! 92: %.exp %_dll.a : %.def
! 93: dlltool $(DLLTOOLFLAGS) $(DLLTOOLFLAGS-$*) \
! 94: --def $< \
! 95: --dllname $*.dll \
! 96: --output-exp $*.exp \
! 97: --output-lib $*_dll.a
! 98:
! 99: # The `sed' commands below are to convert DOS-style `C:\foo\bar'
! 100: # pathnames into Unix-style `//c/foo/bar' pathnames.
! 101: CYGWIN32_LIBS = $(shell echo \
! 102: -L`dirname \`gcc -print-file-name=libgcc.a | \
! 103: sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
! 104: -L`dirname \`gcc -print-file-name=libcygwin.a | \
! 105: sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
! 106: -L`dirname \`gcc -print-file-name=libkernel32.a | \
! 107: sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
! 108: -lgcc -lcygwin -lkernel32 -lgcc)
! 109:
! 110: # Making relocatable DLLs doesn't seem to work.
! 111: # Not quite sure why. The --image-base values below
! 112: # where chosen at random, they seem to work on my machine.
! 113: # DYNRELOC=no is the default
! 114: # DLLDFLAGS-libgc += --image-base=0x2345000
! 115: # DLLDFLAGS-libmer += --image-base=0x1234000
! 116: # DLLDFLAGS-libmercury += --image-base=0x3456000
! 117:
! 118: ifeq "$(strip $(DYNRELOC))" "yes"
! 119:
! 120: # to create relocatable DLLs, we need to do two passes
! 121: # (warning: this is untested)
! 122: %.dll: %.exp %.a %_dll.o dll_init.o dll_fixup.o
! 123: $(DLLD) $(DLLDFLAGS) $(DLLDFLAGS-$*) --dll -o $*.base \
! 124: -e _dll_entry@12 \
! 125: $*.exp $*.a $*_dll.o \
! 126: dll_init.o dll_fixup.o \
! 127: $(LDLIBS) $(LDLIBS-$*) \
! 128: $(CYGWIN32_LIBS)
! 129: # untested
! 130: dlltool $(DLLTOOLFLAGS) $(DLLTOOLFLAGS-$*) \
! 131: --def $*.def \
! 132: --dllname $*.dll \
! 133: --base-file $*.base \
! 134: --output-exp $*.exp
! 135: $(DLLD) $(DLLDFLAGS) $(DLLDFLAGS-$*) --dll -o $*.base \
! 136: -e _dll_entry@12 \
! 137: $*.exp $*.a $*_dll.o \
! 138: dll_init.o dll_fixup.o \
! 139: $(LDLIBS) $(LDLIBS-$*) \
! 140: $(CYGWIN32_LIBS)
! 141: dlltool $(DLLTOOLFLAGS) $(DLLTOOLFLAGS-$*) \
! 142: --def $*.def \
! 143: --dllname $*.dll \
! 144: --base-file $*.base \
! 145: --output-exp $*.exp
! 146: # end untested stuff
! 147: $(DLLD) $(DLLDFLAGS) $(DLLDFLAGS-$*) --dll --base-file $*.base -o $@ \
! 148: -e _dll_entry@12 \
! 149: $*.exp $*.a $*_dll.o \
! 150: dll_init.o dll_fixup.o \
! 151: $(LDLIBS) $(LDLIBS-$*) \
! 152: $(CYGWIN32_LIBS)
! 153: rm -f $*.base
! 154:
! 155: else
! 156:
! 157: %.dll: %.exp %.a %_dll.o dll_fixup.o dll_init.o
! 158: $(DLLD) $(DLLDFLAGS) $(DLLDFLAGS-$*) --dll -o $@ \
! 159: -e _dll_entry@12 \
! 160: $*.exp $*.a $*_dll.o \
! 161: dll_init.o dll_fixup.o \
! 162: $(LDLIBS) $(LDLIBS-$*) \
! 163: $(CYGWIN32_LIBS)
! 164:
! 165: endif
! 166:
! 167: # This black magic piece of assembler needs to be linked in in order to
! 168: # properly terminate the list of imported DLLs.
! 169: dll_fixup.s:
! 170: echo '.section .idata$$3' > dll_fixup.s
! 171: echo '.long 0,0,0,0,0' >> dll_fixup.s
! 172:
! 173: dll_fixup.o: dll_fixup.s
! 174: $(AS) $(ASFLAGS) -o dll_fixup.o dll_fixup.s
! 175:
! 176: # Windows requires each DLL to have an initialization function
! 177: # that is called at certain points (thread/process attach/detach).
! 178: # This one just initializes `_impure_ptr'.
! 179: dll_init.c:
! 180: echo '#include <stdio.h>' > dll_init.c
! 181: echo 'extern struct _reent *_impure_ptr;' >> dll_init.c
! 182: echo 'extern struct _reent *__imp_reent_data;' >> dll_init.c
! 183: echo '__attribute__((stdcall))' >> dll_init.c
! 184: echo 'int dll_entry(int handle, int reason, void *ptr)' >> dll_init.c
! 185: echo '{ _impure_ptr=__imp_reent_data; return 1; }' >> dll_init.c
! 186:
! 187: # The following rule is just there to convince gcc
! 188: # to keep otherwise unused intermediate targets around.
! 189: dont_throw_away: dll_fixup.o dll_init.o
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