From 32a5f1c041d00cdd0246cf7e764a447588f30f3a Mon Sep 17 00:00:00 2001
From: Bart Ribbers <bribbers@disroot.org>
Date: Wed, 9 Aug 2023 14:07:46 +0200
Subject: [PATCH] Fix musl build by using fts_* from external library

musl does not support fts. There is however a standalone package that
can be used, but it must be linked against. This commit adds a check
that makes sure to link to the external library if it is required.
---
 CMakeLists.txt     | 17 +++++++++++++++++
 src/CMakeLists.txt |  2 ++
 2 files changed, 19 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8a0b97c635..0a655babb3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,8 @@ include(GenerateExportHeader)
 include(FeatureSummary)
 include(ECMQtDeclareLoggingCategory)
 include(ECMDeprecationSettings)
+include(CheckIncludeFiles)
+include(CheckLibraryExists)
 
 ecm_setup_version(${RELEASE_SERVICE_VERSION} VARIABLE_PREFIX DOLPHIN
                   VERSION_HEADER "${CMAKE_CURRENT_BINARY_DIR}/src/dolphin_version.h"
@@ -150,6 +152,21 @@ else()
     set(HAVE_TERMINAL TRUE)
 endif()
 
+# Compatibility with platforms without native fts (e.g. musl)
+check_include_files("sys/types.h;sys/stat.h;fts.h" HAVE_FTS_H)
+if(HAVE_FTS_H)
+    check_function_exists(fts_open HAVE_FTS_OPEN)
+    if(NOT HAVE_FTS_OPEN)
+        check_library_exists(fts fts_open "" HAVE_LIB_FTS)
+    endif()
+endif()
+
+if(HAVE_LIB_FTS)
+    set(FTS_LIB fts)
+else()
+    set(FTS_LIB "")
+endif()
+
 add_subdirectory(src)
 add_subdirectory(doc)
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5a481e39ff..fa7de5cc23 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -213,6 +213,8 @@ target_link_libraries(
     KF5::WindowSystem
     KF5::WidgetsAddons
     KF5::Codecs
+
+    ${FTS_LIB}
 )
 
 if(HAVE_BALOO)
-- 
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