diff -Naur ORIG/CMakeLists.txt PATCHED/CMakeLists.txt
--- ORIG/CMakeLists.txt	2026-03-25 14:47:53.817292083 +0000
+++ PATCHED/CMakeLists.txt	2026-03-25 14:47:53.817319727 +0000
@@ -67,7 +67,7 @@
   "${PROJECT_SOURCE_DIR}/src/qcdloop.pc"
   )
 IF(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64")
-set(QUADMATH_NAMES ${QUADMATH_NAMES} libquadmath.so quadmath)
+set(QUADMATH_NAMES ${QUADMATH_NAMES} libquadmath.so libquadmath.so.0 quadmath)
 find_library(QUADMATH_LIBRARY
   NAMES ${QUADMATH_NAMES}
   PATHS /usr/lib64/atlas /usr/lib/atlas
diff -Naur ORIG/src/qcdloop-config.in PATCHED/src/qcdloop-config.in
--- ORIG/src/qcdloop-config.in	2026-03-25 14:47:53.817307572 +0000
+++ PATCHED/src/qcdloop-config.in	2026-03-25 14:47:53.817355535 +0000
@@ -4,7 +4,7 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 
-if [[ $# -eq 0 || -n $( echo $* | grep -E -- "--help|-h" ) ]]; then
+if [[ $# -eq 0 || -n $( echo $* | egrep -- "--help|-h" ) ]]; then
     echo
     echo "qcdloop-config: configuration tool for qcdloop"
     echo
@@ -21,23 +21,23 @@
 
 OUT=""
 
-tmp=$( echo "$*" | grep -E -- '--\<prefix\>')
+tmp=$( echo "$*" | egrep -- '--\<prefix\>')
 test -n "$tmp" && OUT="$OUT @prefix@"
 
-tmp=$( echo "$*" | grep -E -- '--\<incdir\>')
+tmp=$( echo "$*" | egrep -- '--\<incdir\>')
 test -n "$tmp" && OUT="$OUT @includedir@"
 
-tmp=$( echo "$*" | grep -E -- '--\<cppflags\>')
+tmp=$( echo "$*" | egrep -- '--\<cppflags\>')
 test -n "$tmp" && OUT="$OUT -I@includedir@ -std=c++11"
 
-tmp=$( echo "$*" | grep -E -- '--\<libdir\>')
+tmp=$( echo "$*" | egrep -- '--\<libdir\>')
 test -n "$tmp" && OUT="$OUT @libdir@"
 
-tmp=$( echo "$*" | grep -E -- '--\<ldflags\>')
+tmp=$( echo "$*" | egrep -- '--\<ldflags\>')
 test -n "$tmp" && OUT="$OUT -L@libdir@ -lqcdloop -lquadmath"
 
 ## Version
-tmp=$( echo "$*" | grep -E -- '--\<version\>')
+tmp=$( echo "$*" | egrep -- '--\<version\>')
 test -n "$tmp" && OUT="$OUT @VERSION@"
 
 echo $OUT
