Replace unowinreg.dll with execution of `reg QUERY`

The SDK's <https://wiki.openoffice.org/wiki/Documentation/DevGuide/ProUNO/Java/
Transparent_Use_of_Office_UNO_Components> on all platforms included the Windows-
specific unowinreg.dll in generated jars (so that those jars, when distributed
to a Windows environment, would find a LO installation by inspecting the Windows
registry).  That unowinreg.dll was originally built as a 32-bit DLL (though when
building a 64-bit Windows LO, it happened to be built as a 64-bit DLL).  For
non-Windows LO builds, it could either be built locally with a MinGW toolchain
(--enable-build-unowinreg) or downloaded from dev-www.libreoffice.org.

However, that had various issues:

For one, unowinreg.dll was not necessarily available in a distributed jar as a
64-bit DLL for use with a 64-bit JRE on Windows.  (Theoretically, running such a
jar with a 32-bit JRE to access a 64-bit LO installation's URE jars could have
worked.  But practically, those URE jars in turn require native DLLs, which
would then not have been available as 32-bit DLLs for use in the 32-bit JRE.)

For another, at least the unowinreg.dll resulting from --enable-build-unowinreg
on Fedora 33 would have had a dependency on libgcc_s_dw2-1.dll that would
generally not have been available in a target Windows environment.

There appears to be no pure Java way to read the Windows registry, but instead
of using a native code DLL for that, it appears to work just as well to call out
to reg.exe and parse its output.

This removes the --enable-build-unowinreg and --with-mingw-cross-compiler
configuration options.  (The sole use of the MinGW toolchain in LO was for
building unowinreg.dll.)

Change-Id: I3283ea38c884d3221a205e5ab6ec99a2691ef474
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107140
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Jenkins

1 files changed, 0 insertions, 63 deletions

diff --git a/configure.ac b/configure.ac
index 3827f49005d8..3f418e27bb10 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1644,12 +1644,6 @@ libo_FUZZ_ARG_ENABLE(chart-tests,
          who can judge if a test failure is a regression or not.]),
 ,)
 
-AC_ARG_ENABLE(build-unowinreg,
-    AS_HELP_STRING([--enable-build-unowinreg],
-        [Do not use the prebuilt unowinreg.dll. Build it instead. The MinGW C++
-         compiler is needed on Linux.]),
-,)
-
 AC_ARG_ENABLE(build-opensymbol,
     AS_HELP_STRING([--enable-build-opensymbol],
         [Do not use the prebuilt opens___.ttf. Build it instead. This needs
@@ -2549,13 +2543,6 @@ AC_ARG_WITH(os-version,
         [For FreeBSD users, use this option to override the detected OSVERSION.]),
 ,)
 
-AC_ARG_WITH(mingw-cross-compiler,
-    AS_HELP_STRING([--with-mingw-cross-compiler=<mingw32-g++ command>],
-        [Specify the MinGW cross-compiler to use.
-         When building on the ODK on Unix and building unowinreg.dll,
-         specify the MinGW C++ cross-compiler.]),
-,)
-
 AC_ARG_WITH(idlc-cpp,
     AS_HELP_STRING([--with-idlc-cpp=<cpp/ucpp>],
         [Specify the C Preprocessor to use for idlc. Default is ucpp.]),
@@ -4072,12 +4059,6 @@ AC_SUBST(VCVER)
 AC_SUBST(DEVENV)
 AC_SUBST(MSVC_CXX)
 
-#
-# unowinreg.dll
-#
-UNOWINREG_DLL="185d60944ea767075d27247c3162b3bc-unowinreg.dll"
-AC_SUBST(UNOWINREG_DLL)
-
 COM_IS_CLANG=
 AC_MSG_CHECKING([whether the compiler is actually Clang])
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
@@ -8717,54 +8698,10 @@ AC_SUBST([DOXYGEN])
 AC_MSG_CHECKING([whether to build the ODK])
 if test "$enable_odk" = "" -o "$enable_odk" != "no"; then
     AC_MSG_RESULT([yes])
-
-    if test "$with_java" != "no"; then
-        AC_MSG_CHECKING([whether to build unowinreg.dll])
-        if test "$_os" = "WINNT" -a "$enable_build_unowinreg" = ""; then
-            # build on Win by default
-            enable_build_unowinreg=yes
-        fi
-        if test "$enable_build_unowinreg" = "" -o "$enable_build_unowinreg" = "no"; then
-            AC_MSG_RESULT([no])
-            BUILD_UNOWINREG=
-        else
-            AC_MSG_RESULT([yes])
-            BUILD_UNOWINREG=TRUE
-        fi
-        if test "$_os" != "WINNT" -a "$BUILD_UNOWINREG" = "TRUE"; then
-            if test -z "$with_mingw_cross_compiler"; then
-                dnl Guess...
-                AC_CHECK_PROGS(MINGWCXX,i386-mingw32msvc-g++ i586-pc-mingw32-g++ i686-pc-mingw32-g++ i686-w64-mingw32-g++,false)
-            elif test -x "$with_mingw_cross_compiler"; then
-                 MINGWCXX="$with_mingw_cross_compiler"
-            else
-                AC_CHECK_TOOL(MINGWCXX, "$with_mingw_cross_compiler", false)
-            fi
-
-            if test "$MINGWCXX" = "false"; then
-                AC_MSG_ERROR([MinGW32 C++ cross-compiler not found.])
-            fi
-
-            mingwstrip_test="`echo $MINGWCXX | $SED -e s/g++/strip/`"
-            if test -x "$mingwstrip_test"; then
-                MINGWSTRIP="$mingwstrip_test"
-            else
-                AC_CHECK_TOOL(MINGWSTRIP, "$mingwstrip_test", false)
-            fi
-
-            if test "$MINGWSTRIP" = "false"; then
-                AC_MSG_ERROR(MinGW32 binutils not found.)
-            fi
-        fi
-    fi
     BUILD_TYPE="$BUILD_TYPE ODK"
 else
     AC_MSG_RESULT([no])
-    BUILD_UNOWINREG=
 fi
-AC_SUBST(BUILD_UNOWINREG)
-AC_SUBST(MINGWCXX)
-AC_SUBST(MINGWSTRIP)
 
 dnl ===================================================================
 dnl Check for system zlib