Compensate for loss of Type 1 "Standard Symbols L" substitute for "Symbol"
At least for me on Linux since LO 5.3, 'soffice sw/qa/extras/rtfexport/data/fdo72031.rtf' shows "Å" (rendered in "DejaVu Sans") instead of "⊕" (rendered in "Standard Symbols L"). That's presumably because 47ea13ef "Kill the old Unix layout engines" removed support for Type 1 fonts (see "Ignore Type 1 fonts" in FontCfgWrapper::addFontSet, vcl/unx/generic/fontmanager/fontconfig.cxx), and my (Fedora 25) /usr/share/fonts/default/Type1/s050000l.pfb "Standard Symbols L" is a Type 1 font. So we fell back to fontconfig's generic (weak) suggestion of "DejaVu Sans" as a substitute for "Symbol". So extend our fc_local.conf to suggest our "OpenSymbol" as a substitute for "Symbol". As that fc_local.conf was originally brought along by --with-fonts, which is enabled by default but can be disabled, compilation of fc_local.conf from the various snippets is moved to postprocess. macOS and Windows were never affected, as they both come with a "Symbol" font installed in the system. (And we don't install fc_local.conf on Windows at all.) Change-Id: I8d6d87f24974577fd66f5f3989f606237ebb3d75 Reviewed-on: https://gerrit.libreoffice.org/42670Reviewed-by: Stephan Bergmann <email@example.com> Tested-by: Stephan Bergmann <firstname.lastname@example.org>
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