https://invent.kde.org/utilities/filelight/-/merge_requests/42
https://invent.kde.org/utilities/filelight/-/commit/861afa5fb0d2a839d7e83f7df644952219b84a3c

Instead of hardcoding knowledege about glibc versions, check for the
presence of sincos with CMake.

Commit 93577e2a4927cf1640e8ac7153cd22ff54180bba wrongly added a
SINCOS_H_IMPLEMENTATION macro instead of making it a static inline
function or similar, so remove that as well.
---
 src/CMakeLists.txt     |  6 ++++++
 src/radialMap/map.cpp  |  1 -
 src/radialMap/sincos.h | 10 ++--------
 3 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5634ff9..7007297 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -9,6 +9,12 @@ ecm_setup_version(${PROJECT_VERSION}
     VARIABLE_PREFIX FILELIGHT
     VERSION_HEADER version.h)
 
+include(CheckCXXSymbolExists)
+check_cxx_symbol_exists(sincos "math.h" HAVE_SINCOS)
+if (HAVE_SINCOS)
+    add_definitions(-DHAVE_SINCOS)
+endif()
+
 add_library(filelightInternal STATIC fileTree.cpp directoryIterator.cpp)
 if (WIN32)
     target_sources(filelightInternal PRIVATE windowsWalker.cpp)
diff --git a/src/radialMap/map.cpp b/src/radialMap/map.cpp
index b60d1da..b6bb55b 100644
--- a/src/radialMap/map.cpp
+++ b/src/radialMap/map.cpp
@@ -20,7 +20,6 @@
 #include "radialMap.h" // defines
 
 #include "Config.h"
-#define SINCOS_H_IMPLEMENTATION (1)
 #include "sincos.h"
 #include "widget.h"
 
diff --git a/src/radialMap/sincos.h b/src/radialMap/sincos.h
index 142504b..986a899 100644
--- a/src/radialMap/sincos.h
+++ b/src/radialMap/sincos.h
@@ -10,21 +10,15 @@
 
 #include <math.h>
 
-#if !defined(__GLIBC__) || (__GLIBC__ < 2) ||  (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1)
+#ifndef HAVE_SINCOS
 
 #include <qmath.h>
 
-void
-sincos(double angleRadians, double *Sin, double *Cos);
-
-#ifdef SINCOS_H_IMPLEMENTATION
-void
-sincos(double angleRadians, double *Sin, double *Cos)
+static inline void sincos(double angleRadians, double *Sin, double *Cos)
 {
     *Sin = qSin(angleRadians);
     *Cos = qCos(angleRadians);
 }
-#endif
 
 #endif
 
-- 
2.35.1