[flang-commits] [flang] [flang] Fixed compiler build on glibc 2.17 systems after 3149c93. (PR #84873)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-flang-semantics

Author: Slava Zakharin (vzakhari)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/84873.diff


3 Files Affected:

- (modified) flang/include/flang/Evaluate/integer.h (+4) 
- (modified) flang/include/flang/Evaluate/real.h (+4) 
- (modified) flang/lib/Evaluate/fold-implementation.h (+4) 


``````````diff
diff --git a/flang/include/flang/Evaluate/integer.h b/flang/include/flang/Evaluate/integer.h
index 31768c21daae62..7395645701265d 100644
--- a/flang/include/flang/Evaluate/integer.h
+++ b/flang/include/flang/Evaluate/integer.h
@@ -27,6 +27,10 @@
 #include <string>
 #include <type_traits>
 
+// Some environments, viz. glibc 2.17, allow the macro HUGE
+// to leak out of <math.h>.
+#undef HUGE
+
 namespace Fortran::evaluate::value {
 
 // Implements an integer as an assembly of smaller host integer parts
diff --git a/flang/include/flang/Evaluate/real.h b/flang/include/flang/Evaluate/real.h
index 5266bd0ef64bfd..d0da9634651f36 100644
--- a/flang/include/flang/Evaluate/real.h
+++ b/flang/include/flang/Evaluate/real.h
@@ -18,6 +18,10 @@
 #include <limits>
 #include <string>
 
+// Some environments, viz. glibc 2.17, allow the macro HUGE
+// to leak out of <math.h>.
+#undef HUGE
+
 namespace llvm {
 class raw_ostream;
 }
diff --git a/flang/lib/Evaluate/fold-implementation.h b/flang/lib/Evaluate/fold-implementation.h
index 6b3c9416724cb6..9dd8c3843465d5 100644
--- a/flang/lib/Evaluate/fold-implementation.h
+++ b/flang/lib/Evaluate/fold-implementation.h
@@ -39,6 +39,10 @@
 #include <type_traits>
 #include <variant>
 
+// Some environments, viz. glibc 2.17, allow the macro HUGE
+// to leak out of <math.h>.
+#undef HUGE
+
 namespace Fortran::evaluate {
 
 // Utilities

``````````

</details>


https://github.com/llvm/llvm-project/pull/84873