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Index: share/mk/src.opts.mk
===================================================================
--- share/mk/src.opts.mk
+++ share/mk/src.opts.mk
@@ -191,25 +191,29 @@
.else
__TT=${MACHINE}
.endif
-# Clang is only for x86, powerpc and little-endian arm right now, by default.
-.if ${__T} == "amd64" || ${__T} == "i386" || ${__T:Mpowerpc*}
-__DEFAULT_YES_OPTIONS+=CLANG CLANG_FULL CLANG_BOOTSTRAP
+
+.include <bsd.compiler.mk>
+.if !${COMPILER_FEATURES:Mc++11}
+# If the compiler is not C++11 capable, disable clang and use gcc instead.
+__DEFAULT_YES_OPTIONS+=GCC GCC_BOOTSTRAP GNUCXX
+__DEFAULT_NO_OPTIONS+=CLANG CLANG_BOOTSTRAP CLANG_FULL CLANG_IS_CC
+.elif ${__T} == "amd64" || ${__T} == "i386"
+# On x86, clang is enabled, and will be installed as the default cc.
+__DEFAULT_YES_OPTIONS+=CLANG CLANG_BOOTSTRAP CLANG_FULL CLANG_IS_CC
+__DEFAULT_NO_OPTIONS+=GCC GCC_BOOTSTRAP GNUCXX
.elif ${__TT} == "arm" && ${__T:Marm*eb*} == ""
-__DEFAULT_YES_OPTIONS+=CLANG CLANG_BOOTSTRAP
-# GCC is unable to build the full clang on arm, disable it by default.
-__DEFAULT_NO_OPTIONS+=CLANG_FULL
+# On little-endian arm, clang is enabled, and it is installed as the default
+# cc, but since gcc is unable to build the full clang, disable it by default.
+__DEFAULT_YES_OPTIONS+=CLANG CLANG_BOOTSTRAP CLANG_IS_CC
+__DEFAULT_NO_OPTIONS+=CLANG_FULL GCC GCC_BOOTSTRAP GNUCXX
+.elif ${__T:Mpowerpc*}
+# On powerpc, clang is enabled, but gcc is installed as the default cc.
+__DEFAULT_YES_OPTIONS+=CLANG CLANG_FULL GCC GCC_BOOTSTRAP GNUCXX
+__DEFAULT_NO_OPTIONS+=CLANG_BOOTSTRAP CLANG_IS_CC
.else
-__DEFAULT_NO_OPTIONS+=CLANG CLANG_FULL CLANG_BOOTSTRAP
-.endif
-# Clang the default system compiler only on little-endian arm and x86.
-.if ${__T} == "amd64" || (${__TT} == "arm" && ${__T:Marm*eb*} == "") || \
- ${__T} == "i386"
-__DEFAULT_YES_OPTIONS+=CLANG_IS_CC
-__DEFAULT_NO_OPTIONS+=GCC GCC_BOOTSTRAP GNUCXX
-.else
-# If clang is not cc, then build gcc by default
-__DEFAULT_NO_OPTIONS+=CLANG_IS_CC CLANG CLANG_BOOTSTRAP
+# Everything else disables clang, and uses gcc instead.
__DEFAULT_YES_OPTIONS+=GCC GCC_BOOTSTRAP GNUCXX
+__DEFAULT_NO_OPTIONS+=CLANG CLANG_BOOTSTRAP CLANG_FULL CLANG_IS_CC
.endif
.include <bsd.mkopt.mk>
@@ -217,7 +221,6 @@
#
# MK_* options that default to "yes" if the compiler is a C++11 compiler.
#
-.include <bsd.compiler.mk>
.for var in \
LIBCPLUSPLUS
.if !defined(MK_${var})

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