[libc-commits] [libc] [libc][math] Add LIBC_CONF_MATH_USE_SYSTEM_FENV / LIBC_MATH_USE_SYSTEM_FENV (PR #172902)

[Michael Jones via libc-commits]

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@@ -123,6 +123,14 @@ function(_get_compile_options_from_config output_var)
     list(APPEND config_options "-DLIBC_COPT_RAW_MUTEX_DEFAULT_SPIN_COUNT=${LIBC_CONF_RAW_MUTEX_DEFAULT_SPIN_COUNT}")
   endif()
 
+  if(LIBC_CONF_MATH_USE_SYSTEM_FENV)
+    if(MSVC)
+      list(APPEND config_options "/DLIBC_MATH_USE_SYSTEM_FENV")
+    else()
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michaelrj-google wrote:

would it make sense to generalize this so we don't need a special case for MSVC for every config option?

https://github.com/llvm/llvm-project/pull/172902