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Date: Fri, 17 Apr 1998 16:28:45 -0400
Message-Id: <199804172028.QAA08423@subrogation.cygnus.com>
From: Ian Lance Taylor <ian@cygnus.com>
To: bug-libtool@gnu.org
Subject: cygwin32 support in libtool
Xref: trick.profitpress.com mail.libtool:1336
Lines: 290
X-Gnus-Article-Number: 1   Mon Nov  2 17:17:26 1998

Here are the libtool patches I've worked up for cygwin32 support.
These should be relative to the 1.2 release.

These patches have some bogosities.

I needed to build a C file to compile when building the DLL.  That C
file naturally includes semicolons.  I could not figure out how to get
a semicolon into archive_cmds; the various approaches I tried all
failed, because ltmain splits archive_cmds at semicolons.  So I wound
up just creating libtool.c in ltconfig.  This libtool.c file never
gets deleted.

Both archive_cmds and old_archive_from_new_cmds need to use the same
definitions file.  I created it in archive_cmds and deleted it in
old_archive_from_new_cmds.

Ian

Index: ltconfig.in
===================================================================
RCS file: /cvs/cvsfiles/devo/libtool/ltconfig.in,v
retrieving revision 1.6
retrieving revision 1.8
diff -p -r1.6 -r1.8
*** ltconfig.in	1998/03/23 18:28:53	1.6
--- ltconfig.in	1998/04/17 20:20:13	1.8
*************** old_LD="$LD"
*** 97,102 ****
--- 97,104 ----
  old_LN_S="$LN_S"
  old_NM="$NM"
  old_RANLIB="$RANLIB"
+ old_DLLTOOL="$DLLTOOL"
+ old_AS="$AS"
  
  # Parse the command line options.
  args=
*************** if test -n "$RANLIB"; then
*** 351,356 ****
--- 353,362 ----
    old_postinstall_cmds="\$RANLIB \$oldlib;$old_postinstall_cmds"
  fi
  
+ # Set sane defaults for `DLLTOOL' and `AS', used on cygwin32.
+ test -z "$DLLTOOL" && DLLTOOL=dlltool
+ test -z "$AS" && AS=as
+ 
  # Check to see if we are using GCC.
  if test "$with_gcc" != yes || test -z "$CC"; then
    # If CC is not set, then try to find GCC or a usable CC.
*************** if test "$with_gcc" = yes; then
*** 456,462 ****
    aix3* | aix4* | irix5* | irix6* | osf3* | osf4*)
      # PIC is the default for these OSes.
      ;;
!   os2*)
      # We can build DLLs from non-PIC.
      ;;
    amigaos*)
--- 462,468 ----
    aix3* | aix4* | irix5* | irix6* | osf3* | osf4*)
      # PIC is the default for these OSes.
      ;;
!   cygwin32* | os2*)
      # We can build DLLs from non-PIC.
      ;;
    amigaos*)
*************** else
*** 490,496 ****
      # PIC (with -KPIC) is the default.
      ;;
  
!   os2*)
      # We can build DLLs from non-PIC.
      ;;
  
--- 496,502 ----
      # PIC (with -KPIC) is the default.
      ;;
  
!   cygwin32* | os2*)
      # We can build DLLs from non-PIC.
      ;;
  
*************** hardcode_shlibpath_var=unsupported
*** 702,708 ****
  runpath_var=
  
  case "$host_os" in
! amigaos* | sunos4*)
    # On these operating systems, we should treat GNU ld like the system ld.
    gnu_ld_acts_native=yes
    ;;
--- 708,714 ----
  runpath_var=
  
  case "$host_os" in
! amigaos* | sunos4* | cygwin32*)
    # On these operating systems, we should treat GNU ld like the system ld.
    gnu_ld_acts_native=yes
    ;;
*************** else
*** 756,761 ****
--- 762,788 ----
      hardcode_minus_L=yes
      ;;
  
+   cygwin32*)
+     # hardcode_libdir_flag_spec is actually meaningless, as there is
+     # no search path for DLLs.
+     hardcode_libdir_flag_spec='-L$libdir'
+     allow_undefined_flag=unsupported
+     # Very, very bogus.
+     echo '
+ #include <windows.h>
+ 
+ struct _reent *_impure_ptr;
+ extern struct _reent *__imp_reent_data;
+ BOOL APIENTRY
+ __dll_entry (HINSTANCE hinst, DWORD reason, LPVOID reserved)
+ {
+   _impure_ptr = __imp_reent_data;
+ }
+ ' > libtool.c
+     archive_cmds='$CC -c libtool.c;echo EXPORTS > $soname-def;$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' >> $soname-def;$LD -s --base-file $soname-base --dll -e ___dll_entry@12 -o $lib libtool.o$libobjs$deplibs;$DLLTOOL --as=$AS --dllname $soname --def $soname-def --base-file $soname-base --output-exp $soname-exp;$LD -s --base-file $soname-base $soname-exp --dll -e ___dll_entry@12 -o $lib libtool.o$libobjs$deplibs;$DLLTOOL --as=$AS --dllname $soname --def $soname-def --base-file $soname-base --output-exp $soname-exp;$LD $soname-exp --dll -e ___dll_entry@12 -o $lib libtool.o$libobjs$deplibs;$rm libtool.o $soname-base $soname-exp'
+     old_archive_from_new_cmds='$DLLTOOL --as=$AS --dllname $soname --def $soname-def --output-lib $objdir/$libname.a;$rm $soname-def'
+     ;;
+ 
    # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
    # support.  Future versions do this automatically, but an explicit c++rt0.o
    # does not break anything, and helps significantly (at the cost of a little
*************** case "$host_os" in
*** 936,941 ****
--- 963,972 ----
  aix*)
    symcode='[BCDTU]'
    ;;
+ cygwin32*)
+   sympat='_\([_A-Za-z][_A-Za-z0-9]*\)'
+   symxfrm='_\1 \1'
+   ;;
  irix*)
    # Cannot use undefined symbols on IRIX because inlined functions mess us up.
    symcode='[BCDEGRST]'
*************** if $NM -V 2>&1 | egrep '(GNU|with BFD)' 
*** 950,955 ****
--- 981,994 ----
    symcode='[ABCDGISTUW]'
  fi
  
+ case "$host_os" in
+ cygwin32*)
+   # We do not want undefined symbols on cygwin32.  The user must
+   # arrange to define them via -l arguments.
+   symcode='[ABCDGISTW]'
+   ;;
+ esac
+ 
  # Write the raw and C identifiers.
  global_symbol_pipe="sed -n -e 's/^.* $symcode $sympat$/$symxfrm/p'"
  
*************** amigaos*)
*** 1123,1128 ****
--- 1162,1174 ----
    finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`$echo "X$lib" | $Xsed -e '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; test $rm /sys/libs/${libname}_ixlibrary.a; $show "(cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a)"; (cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a) || exit 1; done'
    ;;
  
+ cygwin32*)
+   version_type=windows
+   library_names_spec='${libname}`echo ${release} | sed -e 's/[.]/-/g'`${versuffix}.dll $libname.a'
+   dynamic_linker='Win32 ld.exe'
+   shlibpath_var=PATH
+   ;;
+ 
  freebsd2* | freebsd3*)
    version_type=sunos
    library_names_spec='${libname}${release}.so.$versuffix $libname.so'
*************** ltecho="$echo"
*** 1285,1293 ****
  
  # Now quote all the things that may contain metacharacters.
  for var in ltecho old_CC old_CFLAGS old_CPPFLAGS old_LD old_NM old_RANLIB \
!   old_LN_S AR CC LD LN_S NM reload_flag reload_cmds wl pic_flag \
!   link_static_flag no_builtin_flag export_dynamic_flag_spec \
!   libname_spec library_names_spec soname_spec RANLIB \
    old_archive_cmds old_archive_from_new_cmds old_postinstall_cmds \
    old_postuninstall_cmds archive_cmds postinstall_cmds postuninstall_cmds \
    allow_undefined_flag no_undefined_flag \
--- 1331,1339 ----
  
  # Now quote all the things that may contain metacharacters.
  for var in ltecho old_CC old_CFLAGS old_CPPFLAGS old_LD old_NM old_RANLIB \
!   old_LN_S old_DLLTOOL old_AS AR CC LD LN_S NM DLLTOOL AS reload_flag \
!   reload_cmds wl pic_flag link_static_flag no_builtin_flag \
!   export_dynamic_flag_spec libname_spec library_names_spec soname_spec RANLIB \
    old_archive_cmds old_archive_from_new_cmds old_postinstall_cmds \
    old_postuninstall_cmds archive_cmds postinstall_cmds postuninstall_cmds \
    allow_undefined_flag no_undefined_flag \
*************** cat <<EOF > $ofile
*** 1345,1350 ****
--- 1391,1397 ----
  #
  # CC="$old_CC" CFLAGS="$old_CFLAGS" CPPFLAGS="$old_CPPFLAGS" \\
  # LD="$old_LD" NM="$old_NM" RANLIB="$old_RANLIB" LN_S="$old_LN_S" \\
+ # DLLTOOL="$old_DLLTOOL" AS="$old_AS" \\
  #   $0$ltconfig_args
  #
  # Compiler and other test output produced by $progname, useful for
*************** LN_S="$LN_S"
*** 1390,1395 ****
--- 1437,1448 ----
  
  # A BSD-compatible nm program.
  NM="$NM"
+ 
+ # Used on cygwin32: DLL creation program.
+ DLLTOOL="$DLLTOOL"
+ 
+ # Used on cygwin32: assembler.
+ AS="$AS"
  
  # The name of the directory that contains temporary libtool files.
  objdir="$objdir"
Index: ltmain.in
===================================================================
RCS file: /cvs/cvsfiles/devo/libtool/ltmain.in,v
retrieving revision 1.3
retrieving revision 1.4
diff -p -r1.3 -r1.4
*** ltmain.in	1998/03/20 23:35:33	1.3
--- ltmain.in	1998/04/17 20:20:14	1.4
*************** if test -z "$show_help"; then
*** 967,972 ****
--- 967,980 ----
          versuffix="$current.$revision"
          ;;
  
+       windows)
+         # Like Linux, but with '-' rather than '.', and with a leading
+         # '-', since we only want one extension on Windows 95.
+         version_vars="$version_vars major versuffix"
+         major=`expr $current - $age`
+         versuffix="-$major-$age-$revision"
+         ;;
+ 
        *)
          $echo "$modename: unknown library version type \`$version_type'" 1>&2
          echo "Fatal configuration error.  See the $PACKAGE docs for more information." 1>&2
Index: libtool.m4
===================================================================
RCS file: /cvs/cvsfiles/devo/libtool/libtool.m4,v
retrieving revision 1.11
retrieving revision 1.12
diff -p -r1.11 -r1.12
*** libtool.m4	1998/04/13 16:09:14	1.11
--- libtool.m4	1998/04/13 20:44:46	1.12
*************** case "$host" in
*** 70,80 ****
--- 70,86 ----
    # On SCO OpenServer 5, we need -belf to get full-featured binaries.
    CFLAGS="$CFLAGS -belf"
    ;;
+ 
+ *-*-cygwin32*)
+   AM_SYS_LIBTOOL_CYGWIN32
+   ;;
+ 
  esac
  
  # Actually configure libtool.  ac_aux_dir is where install-sh is found.
  CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \
  LD="$LD" NM="$NM" RANLIB="$RANLIB" LN_S="$LN_S" \
+ DLLTOOL="$DLLTOOL" AS="$AS" \
  ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/ltconfig \
  $libtool_flags --no-verify $ac_aux_dir/ltmain.sh $host \
  || AC_MSG_ERROR([libtool configure failed])
*************** fi])
*** 255,258 ****
--- 261,270 ----
  NM="$ac_cv_path_NM"
  AC_MSG_RESULT([$NM])
  AC_SUBST(NM)
+ ])
+ 
+ # AM_SYS_LIBTOOL_CYGWIN32 - find tools needed on cygwin32
+ AC_DEFUN(AM_SYS_LIBTOOL_CYGWIN32,
+ [AC_CHECK_TOOL(DLLTOOL, dlltool, false)
+ AC_CHECK_TOOL(AS, as, false)
  ])