From b87fbc93a64d9b5dd219396fc5c98e8779c55810 Mon Sep 17 00:00:00 2001
From: Přemysl Eric Janouch <p@janouch.name>
Date: Wed, 11 Sep 2024 04:55:48 +0200
Subject: Support musl libc

---
 CMakeLists.txt   | 20 ++++++++++++++------
 config.h.in      |  2 ++
 json-rpc-shell.c |  5 ++---
 3 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6afeaa4..501ea3a 100644
--- a/CMakeLists.txt
+++ b/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})
diff --git a/config.h.in b/config.h.in
index 87e075c..644d58a 100644
--- a/config.h.in
+++ b/config.h.in
@@ -7,5 +7,7 @@
 #cmakedefine HAVE_READLINE
 #cmakedefine HAVE_EDITLINE
 
+#cmakedefine01 ICONV_ACCEPTS_TRANSLIT
+
 #endif  // ! CONFIG_H
 
diff --git a/json-rpc-shell.c b/json-rpc-shell.c
index 86e291d..a80be5d 100644
--- a/json-rpc-shell.c
+++ b/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
-- 
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