xmlhelp — Bazel Migration Notes

Migrated to Bazel as two cc_binary (linkshared) targets.

Targets

Target	Output	Description
`//main/xmlhelp:tvhlp1`	`tvhlp1.dll`	TreeView help hierarchy data source
`//main/xmlhelp:ucpchelp1`	`ucpchelp1.dll`	UCB content provider for compiled help

Source layout

source/treeview/        tvhlp1 sources (tvfactory.cxx, tvread.cxx)
source/cxxhelp/provider/ ucpchelp1 provider sources (13 files)
source/cxxhelp/qe/      DocGenerator.cxx (query engine, used by ucpchelp1)
source/cxxhelp/util/    Decompressor.cxx (used by ucpchelp1)
source/cxxhelp/inc/     Internal headers: qe/, util/, excep/ (angle-bracket includes)
inc/pch/                precompiled_xmlhelp.hxx (empty PCH placeholder)
util/                   DEF files + component files

Key decisions

stlport: databases.hxx uses std::hash_map/std::hash_set — requires stlport.
libxslt: urlparameter.cxx uses <libxslt/xslt.h> and related XSLT API.
libxml2: ucpchelp1 uses libxml2 (via libxslt transitive dependency and direct use).
l10ntools helplinker_headers: databases.cxx includes <l10ntools/compilehelp.hxx>.
HAVE_EXPAT_H: define required by ucpchelp1 as in the original makefile.
vos_headers: both DLLs include <vos/diagnose.hxx>.
DEF files: created at util/tvhlp1.def and util/ucpchelp1.def; both export only component_getImplementationEnvironment and component_getFactory (no component_canUnload).

Include paths (copts)

tvhlp1: /Imain/xmlhelp/inc, /Imain/xmlhelp/inc/pch, /Imain/xmlhelp/source/treeview

ucpchelp1: /Imain/xmlhelp/inc, /Imain/xmlhelp/inc/pch, /Imain/xmlhelp/source/cxxhelp/inc, /Imain/xmlhelp/source/cxxhelp/provider