Fix certain non-GNU build configurations

Sadly, the 3.5 deprecation warning doesn't go away after this.

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.0)
+cmake_minimum_required (VERSION 3.0...3.27)
 project (termo VERSION 0.1.0 LANGUAGES C)
 
 if ("${CMAKE_C_COMPILER_ID}" MATCHES "GNU" OR CMAKE_COMPILER_IS_GNUCC)
@@ -61,6 +61,8 @@ else ()
 endif ()
 
 # -liconv may or may not be a part of libc
+find_path (iconv_INCLUDE_DIRS iconv.h)
+include_directories (${iconv_INCLUDE_DIRS})
 find_library (iconv_LIBRARIES iconv)
 if (iconv_LIBRARIES)
 	list (APPEND lib_libraries ${iconv_LIBRARIES})
@@ -164,9 +166,9 @@ file (WRITE "${PROJECT_BINARY_DIR}/${PROJECT_NAME}.pc"
 	"Name: ${PROJECT_NAME}\n"
 	"Description: Terminal key input library\n"
 	"Version: ${PROJECT_VERSION}\n"
-	"Libs: -L${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR} -l${project_LIB_NAME}\n"
+	"Libs: -L${CMAKE_INSTALL_FULL_LIBDIR} -l${project_LIB_NAME}\n"
 	"Libs.private: ${lib_libraries}\n"
-	"Cflags: -I${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}/${project_INCLUDE_NAME}\n")
+	"Cflags: -I${CMAKE_INSTALL_FULL_INCLUDEDIR}/${project_INCLUDE_NAME}\n")
 install (FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}.pc"
 	DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 

cmake/FindNcursesw.cmake

@@ -7,7 +7,7 @@ pkg_check_modules (Ncursesw QUIET ncursesw)
 set (required_vars Ncursesw_LIBRARIES)
 if (NOT Ncursesw_FOUND)
 	find_library (Ncursesw_LIBRARIES NAMES ncursesw)
-	find_path (Ncursesw_INCLUDE_DIRS ncurses.h)
+	find_path (Ncursesw_INCLUDE_DIRS ncurses.h PATH_SUFFIXES ncurses)
 	list (APPEND required_vars Ncursesw_INCLUDE_DIRS)
 endif (NOT Ncursesw_FOUND)
 

tests/01base.c

@@ -5,6 +5,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 
 	plan_tests (6);

tests/02getkey.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 

tests/03utf8.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 

tests/04flags.c

@@ -5,6 +5,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 

tests/05read.c

@@ -9,6 +9,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	int fd[2];
 	termo_t *tk;
 	termo_key_t key;

tests/06buffer.c

@@ -5,6 +5,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 

tests/10keyname.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_sym_t sym;
 	const char *end;

tests/11strfkey.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 	char buffer[16];

tests/12strpkey.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 	const char *endp;

tests/13cmpkey.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key1, key2;
 

tests/20canon.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 	const char *endp;

tests/30mouse.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 	termo_mouse_event_t ev;

tests/31position.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 	int line, col;

tests/32modereport.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 	int initial, mode, value;

tests/33focus.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 

tests/39csi.c

@@ -4,6 +4,9 @@
 int
 main (int argc, char *argv[])
 {
+	(void) argc;
+	(void) argv;
+
 	termo_t *tk;
 	termo_key_t key;
 	long args[16];