Merge branch 'fix-cmake-findmpfr' into 'v100-bugfix'

update FindMPFR.cmake according to review in soplex!523

See merge request integer/scip!4045

Author: svigerske

cmake/Modules/FindMPFR.cmake

@@ -1,5 +1,5 @@
-# ${MPFR_INCLUDE_DIRS} contains the paths to mpfr.h (and mpfrxx.h) if MPFR is found.
-# ${MPFR_LIBRARIES} contains libmpfr and libmpfrxx if MPFR is found.
+# ${MPFR_INCLUDE_DIRS} contains the paths to mpfr.h if MPFR is found.
+# ${MPFR_LIBRARIES} contains libmpfr if MPFR is found.
 
 # Check whether environment variable MPFR_DIR was set.
 if(NOT MPFR_DIR)
@@ -26,7 +26,7 @@ else()
         PATH_SUFFIXES lib)
 endif()
 
-SET(MPFR_LIBRARIES ${MPFR_LIBRARY} ${MPFRXX_LIBRARY})
+SET(MPFR_LIBRARIES ${MPFR_LIBRARY})
 
 # look for mpir library and include files when mpfr could not be found
 if(NOT MPFR_LIBRARIES)
@@ -43,18 +43,18 @@ if(NOT MPFR_LIBRARIES)
    SET(MPFR_LIBRARIES ${MPFR_LIBRARY})
 endif()
 
-file(GLOB MPFR_HEADERS "${MPFR_INCLUDE_DIRS}/mpfr.h" "${MPFR_INCLUDE_DIRS}/mpfr-*.h")
+file(GLOB MPFR_HEADERS "${MPFR_INCLUDE_DIRS}/mpfr.h")
 foreach (mpfr_header_filename ${MPFR_HEADERS})
     file(READ "${mpfr_header_filename}" _mpfr_version_header)
     string(REGEX MATCH
-            "define[ \t]+__GNU_MP_VERSION[ \t]+([0-9]+)" _mpfr_major_version_match
+            "define[ \t]+MPFR_VERSION_MAJOR[ \t]+([0-9]+)" _mpfr_major_version_match
             "${_mpfr_version_header}")
     if (_mpfr_major_version_match)
         set(MPFR_MAJOR_VERSION "${CMAKE_MATCH_1}")
-        string(REGEX MATCH "define[ \t]+__GNU_MP_VERSION_MINOR[ \t]+([0-9]+)"
+        string(REGEX MATCH "define[ \t]+MPFR_VERSION_MINOR[ \t]+([0-9]+)"
                 _mpfr_minor_version_match "${_mpfr_version_header}")
         set(MPFR_MINOR_VERSION "${CMAKE_MATCH_1}")
-        string(REGEX MATCH "define[ \t]+__GNU_MP_VERSION_PATCHLEVEL[ \t]+([0-9]+)"
+        string(REGEX MATCH "define[ \t]+MPFR_VERSION_PATCHLEVEL[ \t]+([0-9]+)"
                 _mpfr_patchlevel_version_match "${_mpfr_version_header}")
         set(MPFR_PATCHLEVEL_VERSION "${CMAKE_MATCH_1}")
         set(MPFR_VERSION