Add check

swift-nav · Oct 4, 2023 · 9d45a69 · 9d45a69
1 parent 954e6ce
commit 9d45a69
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/CheckIec559.cmake b/CheckIec559.cmake
@@ -0,0 +1,15 @@
+include(CheckCXXSourceCompiles)
+
+function(check_cxx_double_is_iec559)
+  check_cxx_source_compiles("#include <limits>
+  int main() {
+    return std::numeric_limits<double>::is_iec559 ? 1 : 0;
+  }" IEC559_DOUBLE_SUPPORTED)
+
+  if(IEC559_DOUBLE_SUPPORTED)
+    message(STATUS "Compiler supports IEC 559 (IEEE 754) doubles.")
+  else()
+    message(FATAL_ERROR "Compiler does not support IEC 559 (IEEE 754) doubles.")
+  endif()
+endfunction()
+