https://github.com/knik0/faad2/issues/188
https://github.com/knik0/faad2/issues/190

From 1001f9576cbb29242671c489cd861de61cfe08e2 Mon Sep 17 00:00:00 2001
From: Fabian Greffrath <fabian@greffrath.com>
Date: Thu, 9 Nov 2023 08:23:53 +0100
Subject: [PATCH] check for lrintf() presence and define HAVE_LRINTF
 accordingly

Fixes #188
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,8 @@
 #  - Solaris 11.4 SRU 15 : 3.15
 cmake_minimum_required(VERSION 3.15)
 
+include(CheckSymbolExists)
+
 project(LIBFAAD2 LANGUAGES C)
 
 # If FAAD is being bundled in another project, we don't want to
@@ -90,6 +92,13 @@ set(FAAD_DEFINES
   PACKAGE_VERSION=\"${FAAD_VERSION}\"
 )
 
+check_symbol_exists(lrintf "math.h" HAVE_LRINTF)
+if(HAVE_LRINTF)
+  list(APPEND FAAD_DEFINES
+    HAVE_LRINTF=1
+  )
+endif()
+
 set(FAAD_FLAGS
   -Wall
 )

From 047fd22172a7ff6974b9ac6ca7e4ffdb1944f2e0 Mon Sep 17 00:00:00 2001
From: Fabian Greffrath <fabian@greffrath.com>
Date: Fri, 10 Nov 2023 20:01:30 +0100
Subject: [PATCH] check for lrintf() in -lm and force linking if available

Fixes #190
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@
 #  - Solaris 11.4 SRU 15 : 3.15
 cmake_minimum_required(VERSION 3.15)
 
+include(CheckLibraryExists)
 include(CheckSymbolExists)
 
 project(LIBFAAD2 LANGUAGES C)
@@ -106,6 +107,11 @@ set(FAAD_DEFINES
   PACKAGE_VERSION=\"${FAAD_VERSION}\"
 )
 
+check_library_exists(m lrintf "" HAVE_LIBM)
+if(HAVE_LIBM)
+  list(APPEND CMAKE_REQUIRED_LIBRARIES m)
+endif()
+
 check_symbol_exists(lrintf "math.h" HAVE_LRINTF)
 if(HAVE_LRINTF)
   list(APPEND FAAD_DEFINES