Changeset: 8b63bf057abc for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=8b63bf057abc
Modified Files:
CMakeLists.txt
Branch: cmake-fun
Log Message:
Test for NaN initialization properly.
diffs (37 lines):
diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -195,7 +195,6 @@ if(${CMAKE_C_COMPILER_ID} STREQUAL "Inte
set(INTEL_MATH_H_HACK ON CACHE INTERNAL "must use intel
math.h hack" FORCE)
endif()
endif()
- set(NAN_CANNOT_BE_USED_AS_INITIALIZER ON CACHE INTERNAL "NaN cannot be
used as an initializer") # This hack is only required by the Intel compiler
elseif(MSVC)
set(restrict "__restrict") # C99 feature not present in MSVC
set(inline "__inline") # C99 feature only available on C++ compiler in
MSVC https://docs.microsoft.com/en-us/cpp/cpp/inline-functions-cpp?view=vs-2015
@@ -209,7 +208,24 @@ check_struct_has_member("struct tm" tm_z
#Test CPU endianness
test_big_endian(WORDS_BIGENDIAN)
-#Test for __builtin_add_overflow
+#Test if NaN can be used as initializer
+check_c_source_compiles("
+ #include <math.h>
+
+ extern const float f;
+ extern const double d;
+ const float f = NAN;
+ const double d = NAN;
+
+ int main(int argc, char **argv) {
+ (void) argc;(void) argv;
+ return 0;
+ }" NAN_CAN_BE_USED_AS_INITIALIZER)
+if(NOT NAN_CAN_BE_USED_AS_INITIALIZER)
+ set(NAN_CANNOT_BE_USED_AS_INITIALIZER ON CACHE INTERNAL "NaN cannot be
used as an initializer") # This hack is only required by some versions of the
Intel compiler
+endif()
+
+#Test for __builtin_add_overflow, exists since GCC 5, but inking to libgcc is
optional
check_c_source_compiles("
#include <stdio.h>
#include <stdlib.h>
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