From ec93451443fe6d52305241b49265265ba434547c Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN\"" <yann.morin.1998@free.fr>
Date: Sat, 4 Jan 2014 16:19:18 +0100
Subject: libc/uClibc: add option to enable fenv

Support for fenv.h is a little bit more tricky that enabling it only
for x86-32 is not right.

Add an option for the user to choose whther to install fenv.h or not.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

diff --git a/config/libc/uClibc.in.2 b/config/libc/uClibc.in.2
index e2769e7..c1a84f9 100644
--- a/config/libc/uClibc.in.2
+++ b/config/libc/uClibc.in.2
@@ -65,3 +65,18 @@ config LIBC_UCLIBC_WCHAR
       Say y if you want uClibc to support WCHAR.
 
       Maybe this is needed, if you're building a C++-Compiler
+
+config LIBC_UCLIBC_FENV
+    bool
+    prompt "Add support for fenv.h"
+    default y if ARCH_x86
+    help
+      fenv.h provides functions to control the floating point environment,
+      such as rounding mode, exceptions...
+
+      For some architectures, fenv.h is incomplete, so is not installed
+      by default. x86 is known to have a rather complete fenv.h, so it is
+      installed by default only for x86.
+
+      If you need fenv.h on other architectures, say 'y' here, but you may
+      encounter some issues.
diff --git a/scripts/build/libc/uClibc.sh b/scripts/build/libc/uClibc.sh
index 87fd3f6..f0522ab 100644
--- a/scripts/build/libc/uClibc.sh
+++ b/scripts/build/libc/uClibc.sh
@@ -315,13 +315,6 @@ mungeuClibcConfig() {
                     ;;
             esac
             ;;
-        x86)
-            if [ "${CT_ARCH_BITNESS}" = "32" ]; then
-                 cat <<-ENDSED
-					s/.*(UCLIBC_HAS_FENV).*/\\1=y/
-					ENDSED
-            fi
-            ;;
     esac
 
     # Accomodate for old and new uClibc versions, where the
@@ -374,6 +367,11 @@ mungeuClibcConfig() {
 				ENDSED
             ;;
     esac
+    if [ "${CT_LIBC_UCLIBC_FENV}" = "y" ]; then
+        cat <<-ENDSED
+			s/.*(UCLIBC_HAS_FENV).*/\\1=y/
+			ENDSED
+    fi
 
     # We always want ctor/dtor
     cat <<-ENDSED
-- 
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