[PATCH 2/2] Fix several warnings in configure.ac

[Dmitry Eremin-Solenikov]

* configure.ac: fix warnings in configure.ac due to unescaped
  AC_LANG_PROGRAM. Warnings are observed with autoconf 2.68. There are
  several more warnings observed here due to unescaped AC_LANG_xxx
  macros inside libtool m4 files.

configure.ac:771: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
configure.ac:771: the top level
configure.ac:971: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
configure.ac:971: the top level
configure.ac:985: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
configure.ac:985: the top level

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov at gmail.com>
---
 configure.ac |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index cf4a082..796261a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -768,7 +768,7 @@ if test "$gcry_cv_visibility_attribute" = "yes"; then
        [gcry_cv_gcc_has_f_visibility=no
         _gcc_cflags_save=$CFLAGS
         CFLAGS="-fvisibility=hidden"
-        AC_COMPILE_IFELSE(AC_LANG_PROGRAM([]),
+        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
                           gcry_cv_gcc_has_f_visibility=yes)
         CFLAGS=$_gcc_cflags_save;
        ])
@@ -968,7 +968,7 @@ if test "$GCC" = yes; then
         AC_MSG_CHECKING([if gcc supports -Wno-missing-field-initializers])
         _gcc_cflags_save=$CFLAGS
         CFLAGS="-Wno-missing-field-initializers"
-        AC_COMPILE_IFELSE(AC_LANG_PROGRAM([]),_gcc_wopt=yes,_gcc_wopt=no)
+        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],_gcc_wopt=yes,_gcc_wopt=no)
         AC_MSG_RESULT($_gcc_wopt)
         CFLAGS=$_gcc_cflags_save;
         if test x"$_gcc_wopt" = xyes ; then
@@ -982,7 +982,7 @@ if test "$GCC" = yes; then
         AC_MSG_CHECKING([if gcc supports -Wpointer-arith])
         _gcc_cflags_save=$CFLAGS
         CFLAGS="-Wpointer-arith"
-        AC_COMPILE_IFELSE(AC_LANG_PROGRAM([]),_gcc_wopt=yes,_gcc_wopt=no)
+        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],_gcc_wopt=yes,_gcc_wopt=no)
         AC_MSG_RESULT($_gcc_wopt)
         CFLAGS=$_gcc_cflags_save;
         if test x"$_gcc_wopt" = xyes ; then
-- 
1.7.9