Fixes for IBM XL and Cray CCE builds:

* Correct path to the fallback configuration used to handle mangling for
  C++/Fortran compatibility (CCE, XL)

* Change logic for detecting recursive fortran flags to (a) Include XL
(qrecur), and (b) Be explicit, since not every compiler will correctly reject
an incorrect option (ALL)

NOTE: This patch has been accepted upstream
(see https://github.com/Reference-LAPACK/lapack/pull/621)

##############################################################################

diff -Naur a/CBLAS/CMakeLists.txt b/CBLAS/CMakeLists.txt
--- a/CBLAS/CMakeLists.txt	2021-03-25 12:25:15.000000000 -0600
+++ b/CBLAS/CMakeLists.txt	2021-09-01 16:27:23.561355382 -0600
@@ -11,9 +11,7 @@
                          MACRO_NAMESPACE "F77_"
                          SYMBOL_NAMESPACE "F77_")
 if(NOT FortranCInterface_GLOBAL_FOUND OR NOT FortranCInterface_MODULE_FOUND)
-  message(WARNING "Reverting to pre-defined include/lapacke_mangling.h")
-    configure_file(include/lapacke_mangling_with_flags.h.in
-                  ${LAPACK_BINARY_DIR}/include/lapacke_mangling.h)
+  message(WARNING "Reverting to pre-defined include/cblas_mangling.h")
     configure_file(include/cblas_mangling_with_flags.h.in
                  ${LAPACK_BINARY_DIR}/include/cblas_mangling.h)
 endif()
diff -Naur a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2021-03-25 12:25:15.000000000 -0600
+++ b/CMakeLists.txt	2021-09-02 09:49:18.070436958 -0600
@@ -94,16 +94,22 @@
 
 # Check if recursive flag exists
 include(CheckFortranCompilerFlag)
-check_fortran_compiler_flag("-recursive" _recursiveFlag)
-check_fortran_compiler_flag("-frecursive" _frecursiveFlag)
-check_fortran_compiler_flag("-Mrecursive" _MrecursiveFlag)
+if(CMAKE_Fortran_COMPILER_ID STREQUAL Flang)
+  check_fortran_compiler_flag("-Mrecursive" _MrecursiveFlag)
+elseif(CMAKE_Fortran_COMPILER_ID STREQUAL GNU)
+  check_fortran_compiler_flag("-frecursive" _frecursiveFlag)
+elseif(CMAKE_Fortran_COMPILER_ID STREQUAL Intel)
+  check_fortran_compiler_flag("-recursive" _recursiveFlag)
+elseif(CMAKE_Fortran_COMPILER_ID STREQUAL XL)
+  check_fortran_compiler_flag("-qrecur" _qrecurFlag)
+endif()
 
 # Add recursive flag
-if(_recursiveFlag)
-  string(REGEX MATCH "-recursive" output_test <string> "${CMAKE_Fortran_FLAGS}")
+if(_MrecursiveFlag)
+  string(REGEX MATCH "-Mrecursive" output_test <string> "${CMAKE_Fortran_FLAGS}")
   if(NOT output_test)
-    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -recursive"
-      CACHE STRING "Recursive flag must be set" FORCE)
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Mrecursive"
+    CACHE STRING "Recursive flag must be set" FORCE)
   endif()
 elseif(_frecursiveFlag)
   string(REGEX MATCH "-frecursive" output_test <string> "${CMAKE_Fortran_FLAGS}")
@@ -111,11 +117,17 @@
     set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -frecursive"
     CACHE STRING "Recursive flag must be set" FORCE)
   endif()
-elseif(_MrecursiveFlag)
-  string(REGEX MATCH "-Mrecursive" output_test <string> "${CMAKE_Fortran_FLAGS}")
+elseif(_recursiveFlag)
+  string(REGEX MATCH "-recursive" output_test <string> "${CMAKE_Fortran_FLAGS}")
   if(NOT output_test)
-    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Mrecursive"
-    CACHE STRING "Recursive flag must be set" FORCE)
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -recursive"
+      CACHE STRING "Recursive flag must be set" FORCE)
+  endif()
+elseif(_qrecurFlag)
+  string(REGEX MATCH "-qrecur" output_test <string> "${CMAKE_Fortran_FLAGS}")
+  if(NOT output_test)
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -qrecur"
+      CACHE STRING "Recursive flag must be set" FORCE)
   endif()
 endif()
 
@@ -124,7 +136,7 @@
     set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fp-model strict")
   endif()
   if(CMAKE_Fortran_COMPILER_ID STREQUAL XL)
-    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -qnosave -qstrict=none")
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -qnosave -qstrict")
   endif()
 # Delete libmtsk in linking sequence for Sun/Oracle Fortran Compiler.
 # This library is not present in the Sun package SolarisStudio12.3-linux-x86-bin
diff -Naur a/INSTALL/make.inc.XLF b/INSTALL/make.inc.XLF
--- a/INSTALL/make.inc.XLF	2021-03-25 12:25:15.000000000 -0600
+++ b/INSTALL/make.inc.XLF	2021-09-02 09:50:02.664646455 -0600
@@ -14,10 +14,10 @@
 #  the compiler options desired when NO OPTIMIZATION is selected.
 #
 FC = xlf
-FFLAGS = -O3 -qfixed -qnosave
+FFLAGS = -O3 -qfixed -qnosave -qrecur
 # For -O2, add -qstrict=none
 FFLAGS_DRV = $(FFLAGS)
-FFLAGS_NOOPT = -O0 -qfixed -qnosave
+FFLAGS_NOOPT = -O0 -qfixed -qnosave -qrecur
 
 #  Define LDFLAGS to the desired linker options for your machine.
 #