Most of these files should include config.h first.  In practical terms
there will be potential problems when they use stat/open/fopen and
friends, bit it is easier always to include config.h

./pango/pango-coverage.c
./pango/pangofc-fontmap.c
./pango/glyphstring.c
./pango/ellipsize.c
./pango/pangofc-decoder.c
./pango/pango-glyph-item.c
./pango/shape.c
./pango/reorder-items.c
./pango/pango-layout.c
./pango/mini-fribidi/fribidi_char_type.c
./pango/mini-fribidi/fribidi.c
./pango/mini-fribidi/fribidi_types.c
./pango/mini-fribidi/fribidi_get_type.c
./pango/pangowin32-fontcache.c
./pango/pango-item.c
./pango/pangoft2-render.c
./pango/fonts.c
./pango/pangoxft-render.c
./pango/pango-fontmap.c
./pango/pango-fontset.c
./pango/pango-tabs.c
./pango/opentype/otlbuffer.c
./pango/opentype/pango-ot-info.c
./pango/opentype/disasm.c
./pango/opentype/ottest.c
./pango/opentype/ftxgdef.c
./pango/opentype/ftxgpos.c
./pango/opentype/ftxgsub.c
./pango/opentype/ftxopen.c
./pango/opentype/pango-ot-ruleset.c
./pango/opentype/pango-ot-buffer.c
./pango/pango-attributes.c
./pango/pangoxft-fontmap.c
./pango/pango-engine.c
./pango/pango-script.c
./pango/pango-markup.c
./pango/pangox-fontcache.c
./pango/pangox-fontmap.c
./pango/pango-context.c
./pango/pangofc-font.c
./pango/break.c
./pango/pango-renderer.c
./pango/mapping.c
./pango/pango-color.c
./tools/gen-script-for-lang.c
./modules/thai/thai-fc.c
./modules/thai/thai-ot.c
./modules/basic/basic-x.c
./modules/basic/basic-fc.c
./modules/indic/mprefixups.c
./modules/indic/indic-ot-class-tables.c
./modules/indic/indic-fc.c
./modules/indic/indic-ot.c
./modules/arabic/arabic-fc.c
./modules/arabic/arabic-ot.c
./modules/hangul/hangul-fc.c
./modules/hebrew/hebrew-shaper.c
./modules/hebrew/hebrew-fc.c