CMake: Pass -lm to check_symbol_exists for detecting several math

functions like floorf, ceilf, ... Add test for detecting nearbyintf.

This change was prompted by test/Transforms/SimplifyLibCalls/floor.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86954 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 28dee471ef06d5cfae5a25c98d52094b35020344..3a2b91cc33cf16095f5045dcbae7396010eda6c2 100755 (executable)
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -4,6 +4,11 @@ include(CheckSymbolExists)
 include(CheckFunctionExists)
 include(CheckCXXSourceCompiles)
 
+if( UNIX )
+  # Used by check_symbol_exists:
+  set(CMAKE_REQUIRED_LIBRARIES m)
+endif()
+
 # Helper macros and functions
 macro(add_cxx_include result files)
   set(${result} "")
@@ -84,6 +89,7 @@ check_symbol_exists(isnan cmath HAVE_ISNAN_IN_CMATH)
 check_symbol_exists(isnan math.h HAVE_ISNAN_IN_MATH_H)
 check_symbol_exists(ceilf math.h HAVE_CEILF)
 check_symbol_exists(floorf math.h HAVE_FLOORF)
+check_symbol_exists(nearbyintf math.h HAVE_NEARBYINTF)
 check_symbol_exists(mallinfo malloc.h HAVE_MALLINFO)
 check_symbol_exists(malloc_zone_statistics malloc/malloc.h
                     HAVE_MALLOC_ZONE_STATISTICS)

diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index fa8272798a422064b337b03ed6c4f1ad6ef8c8b7..2bec93f2469e798012735d19196a311eb70de355 100644 (file)
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -253,7 +253,7 @@
 #cmakedefine HAVE_NDIR_H ${HAVE_NDIR_H}
 
 /* Define to 1 if you have the `nearbyintf' function. */
-#undef HAVE_NEARBYINTF
+#cmakedefine HAVE_NEARBYINTF ${HAVE_NEARBYINTF}
 
 /* Define if the neat program is available */
 #cmakedefine HAVE_NEATO ${HAVE_NEATO}