ceph/src/boost/tools/build/src/engine/boehm_gc/Makefile.DLLs

   1 #-----------------------------------------------------------------------------#
   2
   3 # Makefile.DLLs, version 0.4.
   4
   5 # Contributed by Fergus Henderson.
   6
   7 # This Makefile contains rules for creating DLLs on Windows using gnu-win32.
   8
   9 #-----------------------------------------------------------------------------#
  10
  11 # This rule creates a `.def' file, which lists the symbols that are exported
  12 # from the DLL.  We use `nm' to get a list of all the exported text (`T')
  13 # symbols and data symbols -- including uninitialized data (`B'),
  14 # initialized data (`D'), read-only data (`R'), and common blocks (`C').
  15 %.def: %.a
  16         echo EXPORTS > $@
  17         nm $< | grep '^........ [BCDRT] _' | sed 's/[^_]*_//' >> $@
  18
  19 # We need to use macros to access global data:
  20 # the user of the DLL must refer to `foo' as `(*__imp_foo)'.
  21 # This rule creates a `_globals.h' file, which contains macros
  22 # for doing this.
  23
  24 SYM_PREFIX = $(firstword $(SYM_PREFIX-$*) $*)
  25 DLL_MACRO = $(SYM_PREFIX)_USE_DLL
  26 IMP_MACRO = $(SYM_PREFIX)_IMP
  27 GLOBAL_MACRO = $(SYM_PREFIX)_GLOBAL
  28
  29 %_globals.h: %.a
  30         echo "/* automatically generated by Makefile.DLLs */"   > $@
  31         echo "#if defined(__GNUC__) && defined(_WIN32) \\"      >> $@
  32         echo "  && defined($(DLL_MACRO))"                       >> $@
  33         echo "#  define $(IMP_MACRO)(name)      __imp_##name"   >> $@
  34         echo "#  define $(GLOBAL_MACRO)(name)   (*$(IMP_MACRO)(name))" >> $@
  35         echo "#else"                                            >> $@
  36         echo "#  define $(GLOBAL_MACRO)(name)   name"           >> $@
  37         echo "#endif"                                           >> $@
  38         echo ""                                                 >> $@
  39         for sym in `nm $< | grep '^........ [BCDR] _' | sed 's/[^_]*_//'`; do \
  40                 echo "#define $$sym     $(GLOBAL_MACRO)($$sym)" >> $@; \
  41         done
  42
  43 # This rule creates the export object file (`foo.exp') which contains the
  44 # jump table array; this export object file becomes part of the DLL.
  45 # This rule also creates the import library (`foo_dll.a') which contains small
  46 # stubs for all the functions exported by the DLL which jump to them via the
  47 # jump table.  Executables that will use the DLL must be linked against this
  48 # stub library.
  49 %.exp %_dll.a : %.def
  50         dlltool $(DLLTOOLFLAGS) $(DLLTOOLFLAGS-$*)              \
  51                 --def $<                                        \
  52                 --dllname $*.dll                                \
  53                 --output-exp $*.exp                             \
  54                 --output-lib $*_dll.a
  55
  56 # The `sed' commands below are to convert DOS-style `C:\foo\bar'
  57 # pathnames into Unix-style `//c/foo/bar' pathnames.
  58 CYGWIN32_LIBS = $(shell echo                                    \
  59         -L`dirname \`gcc -print-file-name=libgcc.a |            \
  60         sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
  61         -L`dirname \`gcc -print-file-name=libcygwin.a | \
  62         sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
  63         -L`dirname \`gcc -print-file-name=libkernel32.a | \
  64         sed -e 's@^\\\\([A-Za-z]\\\\):@//\\\\1@g' -e 's@\\\\\\\\@/@g' \` ` \
  65         -lgcc -lcygwin -lkernel32 -lgcc)
  66
  67 RELOCATABLE=yes
  68
  69 ifeq "$(strip $(RELOCATABLE))" "yes"
  70
  71 # to create relocatable DLLs, we need to do two passes
  72 %.dll: %.exp %.a dll_fixup.o dll_init.o
  73         $(LD) $(LDFLAGS) $(LDFLAGS-$*) --dll -o $*.base                 \
  74                 -e _dll_entry@12 dll_init.o                             \
  75                 dll_fixup.o $*.exp $*.a                                 \
  76                 $(LDLIBS) $(LDLIBS-$*)                                  \
  77                 $(CYGWIN32_LIBS)
  78         $(LD) $(LDFLAGS) $(LDFLAGS-$*) --dll --base-file $*.base -o $@  \
  79                 -e _dll_entry@12 dll_init.o                             \
  80                 dll_fixup.o $*.exp $*.a                                 \
  81                 $(LDLIBS) $(LDLIBS-$*)                                  \
  82                 $(CYGWIN32_LIBS)
  83         rm -f $*.base
  84 else
  85
  86 %.dll: %.exp %.a dll_fixup.o dll_init.o
  87         $(LD) $(LDFLAGS) $(LDFLAGS-$*) --dll -o $@                      \
  88                 -e _dll_entry@12 dll_init.o                             \
  89                 dll_fixup.o $*.exp $*.a                                 \
  90                 $(LDLIBS) $(LDLIBS-$*)                                  \
  91                 $(CYGWIN32_LIBS)
  92
  93 endif
  94
  95 # This black magic piece of assembler needs to be linked in in order to
  96 # properly terminate the list of imported DLLs.
  97 dll_fixup.s:
  98         echo '.section .idata$$3'       > dll_fixup.s
  99         echo '.long 0,0,0,0, 0,0,0,0'   >> dll_fixup.s
 100
 101 # This bit is necessary to provide an initialization function for the DLL.
 102 dll_init.c:
 103         echo '__attribute__((stdcall))' > dll_init.c
 104         echo 'int dll_entry(int handle, int reason, void *ptr)' >> dll_init.c
 105         echo '{return 1; }' >> dll_init.c
 106
 107 dont_throw_away: dll_fixup.o dll_init.o