+ #t))
+ (add-after 'unpack 'adjust-for-new-poppler
+ (lambda _
+ (substitute* (find-files "src/extension/internal/pdfinput")
+ ;; Needed for Poppler 0.82.
+ (("Unicode \\*u") "Unicode const *u")
+ ;; Needed for Poppler 0.83.
+ (("\\(GfxPath") "(const GfxPath")
+ (("GfxSubpath") "const GfxSubpath")
+ (("new GlobalParams\\(\\)")
+ "std::unique_ptr<GlobalParams>(new GlobalParams())")
+ (("new GlobalParams\\(poppler_datadir\\)")
+ "std::unique_ptr<GlobalParams>(new GlobalParams(poppler_datadir))"))
+ #t))
+ (add-before 'configure 'dont-use-system-includes
+ (lambda _
+ ;; Don't add redundant -isystem includes which confuses GCC7.
+ (substitute* "CMakeScripts/DefineDependsandFlags.cmake"
+ (("include_directories\\(SYSTEM")
+ "include_directories("))