Support musl libc

CMakeLists.txt

@@ -29,12 +29,6 @@ set (project_libraries ${dependencies_LIBRARIES} ${LibEV_LIBRARIES})
 include_directories (${dependencies_INCLUDE_DIRS} ${LibEV_INCLUDE_DIRS})
 link_directories (${dependencies_LIBRARY_DIRS})
 
-# -liconv may or may not be a part of libc
-find_library (iconv_LIBRARIES iconv)
-if (iconv_LIBRARIES)
-	list (APPEND project_libraries ${iconv_LIBRARIES})
-endif ()
-
 if ("${CMAKE_SYSTEM_NAME}" MATCHES "BSD")
 	# Need this for SIGWINCH in FreeBSD and OpenBSD respectively;
 	# our POSIX version macros make it undefined
@@ -43,6 +37,20 @@ elseif (APPLE)
 	add_definitions (-D_DARWIN_C_SOURCE)
 endif ()
 
+# -liconv may or may not be a part of libc
+find_library (iconv_LIBRARIES iconv)
+if (iconv_LIBRARIES)
+	list (APPEND project_libraries ${iconv_LIBRARIES})
+endif ()
+
+include (CheckCSourceRuns)
+set (CMAKE_REQUIRED_LIBRARIES ${project_libraries})
+get_property (CMAKE_REQUIRED_INCLUDES
+	DIRECTORY "${PROJECT_SOURCE_DIR}" PROPERTY INCLUDE_DIRECTORIES)
+CHECK_C_SOURCE_RUNS ("#include <iconv.h>
+	int main () { return iconv_open (\"UTF-8//TRANSLIT\", \"ISO-8859-1\")
+		== (iconv_t) -1; }" ICONV_ACCEPTS_TRANSLIT)
+
 if (Ncursesw_FOUND)
 	list (APPEND project_libraries ${Ncursesw_LIBRARIES})
 	include_directories (${Ncursesw_INCLUDE_DIRS})

config.h.in

@@ -7,5 +7,7 @@
 #cmakedefine HAVE_READLINE
 #cmakedefine HAVE_EDITLINE
 
+#cmakedefine01 ICONV_ACCEPTS_TRANSLIT
+
 #endif  // ! CONFIG_H
 

json-rpc-shell.c

@@ -4076,11 +4076,10 @@ main (int argc, char *argv[])
 	setlocale (LC_CTYPE, "");
 
 	char *encoding = nl_langinfo (CODESET);
-#ifdef __linux__
 	// XXX: not quite sure if this is actually desirable
 	// TODO: instead retry with JSON_ENSURE_ASCII
-	encoding = xstrdup_printf ("%s//TRANSLIT", encoding);
-#endif // __linux__
+	if (ICONV_ACCEPTS_TRANSLIT)
+		encoding = xstrdup_printf ("%s//TRANSLIT", encoding);
 
 	if ((g_ctx.term_from_utf8 = iconv_open (encoding, "UTF-8"))
 		== (iconv_t) -1