Use AC_CHECK_DECLS, suggestion by Thomas J.

8cdce0ad · Mathis Rosenhauer · Thomas Jahns · ba12a875 · 8cdce0ad · 8cdce0ad
Commit 8cdce0ad authored Dec 11, 2012 by Mathis Rosenhauer Committed by Thomas Jahns Feb 19, 2013
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configure.ac configure.ac +1 -10

src/decode.c src/decode.c +1 -1

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--- a/configure.ac
+++ b/configure.ac
@@ -30,16 +30,7 @@ AC_TYPE_UINT8_T

 # Checks for library functions.
 AC_CHECK_FUNCS([memset strstr])
-AC_MSG_CHECKING(for __builtin_clzll)
-AC_TRY_LINK([],[
-  __builtin_clzll(1);
-],[
-  AC_DEFINE(AEC_HAVE___BUILTIN_CLZLL, 1, \
-  [Define to 1 if you have the '__builtin__clzll' function.])
-  AC_MSG_RESULT(yes)
-],[
-  AC_MSG_RESULT(no)
-])
+AC_CHECK_DECLS(__builtin_clzll)

 AC_CONFIG_FILES([Makefile         \
                 src/Makefile     \

--- a/src/decode.c
+++ b/src/decode.c
@@ -277,7 +277,7 @@ static inline uint32_t direct_get_fs(struct aec_stream *strm)
    if (state->acc == 0)
        fill_acc(strm);

-#ifdef AEC_HAVE___BUILTIN_CLZLL
+#ifdef HAVE_DECL___BUILTIN_CLZLL
    fs = __builtin_clzll(state->acc) - (64 - state->bitp);
    state->bitp -= fs + 1;
 #else