Build: Fix Autoconf warnings about escaped backquotes.

diff --git a/configure.ac b/configure.ac
index 2e7f97b2fc84f54510b54f6c268ea0ac564453a8..f7d7551b4ea04ab0d50bd595fca2a27b363e38d0 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -297,7 +297,7 @@ case $enable_assembler in
                ;;
        *)
                AC_MSG_RESULT([])
-               AC_MSG_ERROR([--enable-assembler accepts only \`yes', \`no', \`x86', or \`x86_64'.])
+               AC_MSG_ERROR([--enable-assembler accepts only `yes', `no', `x86', or `x86_64'.])
                ;;
 esac
 AM_CONDITIONAL(COND_ASM_X86, test "x$enable_assembler" = xx86)
@@ -317,7 +317,7 @@ if test "x$enable_small" = xyes; then
        AC_DEFINE([HAVE_SMALL], [1], [Define to 1 if optimizing for size.])
 elif test "x$enable_small" != xno; then
        AC_MSG_RESULT([])
-       AC_MSG_ERROR([--enable-small accepts only \`yes' or \`no'])
+       AC_MSG_ERROR([--enable-small accepts only `yes' or `no'])
 fi
 AC_MSG_RESULT([$enable_small])
 AM_CONDITIONAL(COND_SMALL, test "x$enable_small" = xyes)
@@ -334,7 +334,7 @@ AC_ARG_ENABLE([threads], AC_HELP_STRING([--disable-threads],
        [], [enable_threads=yes])
 if test "x$enable_threads" != xyes && test "x$enable_threads" != xno; then
        AC_MSG_RESULT([])
-       AC_MSG_ERROR([--enable-threads accepts only \`yes' or \`no'])
+       AC_MSG_ERROR([--enable-threads accepts only `yes' or `no'])
 fi
 AC_MSG_RESULT([$enable_threads])
 # We use the actual result a little later.