diff --git a/configure.ac b/configure.ac
index 49b2df15..4373c21d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,7 +8,7 @@ dnl ============================================================================
 dnl Custom macro definitions.
 
 dnl JE_CONCAT_VVV(r, a, b)
-dnl 
+dnl
 dnl Set $r to the concatenation of $a and $b, with a space separating them iff
 dnl both $a and $b are non-emty.
 AC_DEFUN([JE_CONCAT_VVV],
@@ -20,7 +20,7 @@ fi
 )
 
 dnl JE_APPEND_VS(a, b)
-dnl 
+dnl
 dnl Set $a to the concatenation of $a and b, with a space separating them iff
 dnl both $a and b are non-empty.
 AC_DEFUN([JE_APPEND_VS],
@@ -31,7 +31,7 @@ AC_DEFUN([JE_APPEND_VS],
 CONFIGURE_CFLAGS=
 SPECIFIED_CFLAGS="${CFLAGS}"
 dnl JE_CFLAGS_ADD(cflag)
-dnl 
+dnl
 dnl CFLAGS is the concatenation of CONFIGURE_CFLAGS and SPECIFIED_CFLAGS
 dnl (ignoring EXTRA_CFLAGS, which does not impact configure tests.  This macro
 dnl appends to CONFIGURE_CFLAGS and regenerates CFLAGS.
@@ -57,7 +57,7 @@ JE_CONCAT_VVV(CFLAGS, CONFIGURE_CFLAGS, SPECIFIED_CFLAGS)
 
 dnl JE_CFLAGS_SAVE()
 dnl JE_CFLAGS_RESTORE()
-dnl 
+dnl
 dnl Save/restore CFLAGS.  Nesting is not supported.
 AC_DEFUN([JE_CFLAGS_SAVE],
 SAVED_CONFIGURE_CFLAGS="${CONFIGURE_CFLAGS}"
@@ -91,7 +91,7 @@ JE_CONCAT_VVV(CXXFLAGS, CONFIGURE_CXXFLAGS, SPECIFIED_CXXFLAGS)
 ])
 
 dnl JE_COMPILABLE(label, hcode, mcode, rvar)
-dnl 
+dnl
 dnl Use AC_LINK_IFELSE() rather than AC_COMPILE_IFELSE() so that linker errors
 dnl cause failure.
 AC_DEFUN([JE_COMPILABLE],
@@ -517,7 +517,7 @@ AC_PROG_AWK
 dnl Platform-specific settings.  abi and RPATH can probably be determined
 dnl programmatically, but doing so is error-prone, which makes it generally
 dnl not worth the trouble.
-dnl 
+dnl
 dnl Define cpp macros in CPPFLAGS, rather than doing AC_DEFINE(macro), since the
 dnl definitions need to be seen before any headers are included, which is a pain
 dnl to make happen otherwise.
@@ -1412,7 +1412,7 @@ AC_ARG_WITH([lg_page_sizes],
 
 dnl ============================================================================
 dnl jemalloc configuration.
-dnl 
+dnl
 
 AC_ARG_WITH([version],
   [AS_HELP_STRING([--with-version=<major>.<minor>.<bugfix>-<nrev>-g<gid>],