Building libunistring with clang, I see these warnings:


lib/unicase/locale-languages.h(99,1): warning: no previous prototype for function 'uc_locale_languages_lookup' [-Wmissing-prototypes]
lib/uninorm/composition-table.h(57,1): warning: no previous prototype for function 'gl_uninorm_compose_lookup' [-Wmissing-prototypes]
tests/select.c(264,1): warning: no previous prototype for function 'rpl_select' [-Wmissing-prototypes]

unictype/bidi_byname.gperf(83,1): warning: no previous prototype for function 'uc_bidi_class_lookup' [-Wmissing-prototypes]
unictype/categ_byname.gperf(74,1): warning: no previous prototype for function 'uc_general_category_lookup' [-Wmissing-prototypes]
unictype/combiningclass_byname.gperf(65,1): warning: no previous prototype for function 'uc_combining_class_lookup' [-Wmissing-prototypes]
unictype/joininggroup_byname.gperf(19,1): warning: no previous prototype for function 'uc_joining_group_lookup' [-Wmissing-prototypes]
unictype/joiningtype_byname.gperf(24,1): warning: no previous prototype for function 'uc_joining_type_lookup' [-Wmissing-prototypes]
unictype/pr_byname.gperf(100,1): warning: no previous prototype for function 'uc_property_lookup' [-Wmissing-prototypes]
unictype/scripts_byname.gperf(148,1): warning: no previous prototype for function 'uc_script_lookup' [-Wmissing-prototypes]

These two patches fix these warnings.


2020-09-05  Bruno Haible  <bruno@clisp.org>

	Fix several "warning: no previous prototype for function".
	* modules/unicase/locale-language (Makefile.am): Add a 'static' keyword
	in front of the declaration of the lookup function in
	unicase/locale-languages.h.
	* modules/unictype/bidiclass-byname (Makefile.am): Likewise in
	unictype/bidi_byname.h.
	* modules/unictype/category-byname (Makefile.am): Likewise in
	unictype/categ_byname.h.
	* modules/unictype/combining-class-byname (Makefile.am): Likewise in
	unictype/combiningclass_byname.h.
	* modules/unictype/joininggroup-byname (Makefile.am): Likewise in
	unictype/joininggroup_byname.h.
	* modules/unictype/joiningtype-byname (Makefile.am): Likewise in
	unictype/joiningtype_byname.h.
	* modules/unictype/property-byname (Makefile.am): Likewise in
	unictype/pr_byname.h.
	* modules/unictype/scripts (Makefile.am): Likewise in
	unictype/scripts_byname.h.
	* modules/uninorm/composition (Makefile.am): Likewise in
	uninorm/composition-table.h.

2020-09-05  Bruno Haible  <bruno@clisp.org>

	select: Fix "warning: no previous prototype for function".
	* lib/select.c: Include <sys/select.h>.