--- a/make/autoconf/flags.m4	Tue Feb 05 09:53:33 2019 -0800
+++ b/make/autoconf/flags.m4	Tue Feb 05 09:56:19 2019 -0800
@@ -421,17 +421,20 @@
 # ------------------------------------------------------------
 # Check that the C compiler supports an argument
 BASIC_DEFUN_NAMED([FLAGS_C_COMPILER_CHECK_ARGUMENTS],
-    [*ARGUMENT IF_TRUE IF_FALSE], [$@],
+    [*ARGUMENT IF_TRUE IF_FALSE PREFIX], [$@],
 [
-  AC_MSG_CHECKING([if the C compiler supports "ARG_ARGUMENT"])
+  AC_MSG_CHECKING([if ARG_PREFIX[CC] supports "ARG_ARGUMENT"])
   supports=yes
 
   saved_cflags="$CFLAGS"
+  saved_cc="$CC"
   CFLAGS="$CFLAGS ARG_ARGUMENT"
+  CC="$ARG_PREFIX[CC]"
   AC_LANG_PUSH([C])
   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [],
       [supports=no])
   AC_LANG_POP([C])
+  CC="$saved_cc"
   CFLAGS="$saved_cflags"
 
   AC_MSG_RESULT([$supports])
@@ -449,17 +452,20 @@
 # ------------------------------------------------------------
 # Check that the C++ compiler supports an argument
 BASIC_DEFUN_NAMED([FLAGS_CXX_COMPILER_CHECK_ARGUMENTS],
-    [*ARGUMENT IF_TRUE IF_FALSE], [$@],
+    [*ARGUMENT IF_TRUE IF_FALSE PREFIX], [$@],
 [
-  AC_MSG_CHECKING([if the C++ compiler supports "ARG_ARGUMENT"])
+  AC_MSG_CHECKING([if ARG_PREFIX[CXX] supports "ARG_ARGUMENT"])
   supports=yes
 
   saved_cxxflags="$CXXFLAGS"
+  saved_cxx="$CXX"
   CXXFLAGS="$CXXFLAG ARG_ARGUMENT"
+  CXX="$ARG_PREFIX[CXX]"
   AC_LANG_PUSH([C++])
   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [],
       [supports=no])
   AC_LANG_POP([C++])
+  CXX="$saved_cxx"
   CXXFLAGS="$saved_cxxflags"
 
   AC_MSG_RESULT([$supports])
@@ -477,18 +483,22 @@
 # ------------------------------------------------------------
 # Check that the C and C++ compilers support an argument
 BASIC_DEFUN_NAMED([FLAGS_COMPILER_CHECK_ARGUMENTS],
-    [*ARGUMENT IF_TRUE IF_FALSE], [$@],
+    [*ARGUMENT IF_TRUE IF_FALSE PREFIX], [$@],
 [
   FLAGS_C_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [ARG_ARGUMENT],
-  					     IF_TRUE: [C_COMP_SUPPORTS="yes"],
-					     IF_FALSE: [C_COMP_SUPPORTS="no"])
+      IF_TRUE: [C_COMP_SUPPORTS="yes"],
+      IF_FALSE: [C_COMP_SUPPORTS="no"],
+      PREFIX: [ARG_PREFIX])
   FLAGS_CXX_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [ARG_ARGUMENT],
-  					       IF_TRUE: [CXX_COMP_SUPPORTS="yes"],
-					       IF_FALSE: [CXX_COMP_SUPPORTS="no"])
+      IF_TRUE: [CXX_COMP_SUPPORTS="yes"],
+      IF_FALSE: [CXX_COMP_SUPPORTS="no"],
+      PREFIX: [ARG_PREFIX])
 
-  AC_MSG_CHECKING([if both compilers support "ARG_ARGUMENT"])
+  AC_MSG_CHECKING([if both ARG_PREFIX[CC] and ARG_PREFIX[CXX] support "ARG_ARGUMENT"])
   supports=no
-  if test "x$C_COMP_SUPPORTS" = "xyes" -a "x$CXX_COMP_SUPPORTS" = "xyes"; then supports=yes; fi
+  if test "x$C_COMP_SUPPORTS" = "xyes" -a "x$CXX_COMP_SUPPORTS" = "xyes"; then
+    supports=yes;
+  fi
 
   AC_MSG_RESULT([$supports])
   if test "x$supports" = "xyes" ; then