During an exp-run for llvm 15 (see bug 265425), it turned out that
x11-toolkits/pangox-compat failed to build with clang 15:
pangox.c:983:15: error: incompatible integer to pointer conversion assigning to 'PangoFontMetrics *' (aka 'struct _PangoFontMetrics *') from 'int' [-Wint-conversion]
metrics = pango_font_metrics_new ();
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
pangox-fontmap.c:944:9: error: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int' [-Wint-conversion]
char *files_str = pango_config_key_get ("PangoX/AliasFiles");
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This is because pangox-compat uses two private functions from the main
pango library, which are not declared in the public pango headers.
Fix the errors by adding the two private functions in
pango-impl-utils.h, copying the declarations from pango-font-private.h
and pango-utils-private.h.
PR: 268301
Approved by: fluffy (maintainer)
MFH: 2022Q4
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