[git] GCRYPT - branch, master, updated. libgcrypt-1.5.0-357-g2590a5d

[by Jussi Kivilinna]

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- Log -----------------------------------------------------------------
commit 2590a5df6f5fc884614c8c379324027d2d61b9b5
Author: Jussi Kivilinna <jussi.kivilinna at iki.fi>
Date:   Wed Nov 6 19:05:09 2013 +0200

    Fix __builtin_bswap32/64 checks
    
    * configure.ac (gcry_cv_have_builtin_bswap32)
    (gcry_cv_have_builtin_bswap64): Change compile checks to link checks.
    --
    
    Patch changes compile checks to link checks for __builtin_bswap(32|64).
    Compiling obviously works with missing functions, linking not so much.
    
    Signed-off-by: Jussi Kivilinna <jussi.kivilinna at iki.fi>

diff --git a/configure.ac b/configure.ac
index e3471d0..c4f8776 100644
--- a/configure.ac
+++ b/configure.ac
@@ -779,8 +779,8 @@ AC_SUBST(FALLBACK_SOCKLEN_T)
 AC_CACHE_CHECK(for __builtin_bswap32,
        [gcry_cv_have_builtin_bswap32],
        [gcry_cv_have_builtin_bswap32=no
-        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
-          [[int foo(int x) { return __builtin_bswap32(x); }]])],
+        AC_LINK_IFELSE([AC_LANG_PROGRAM([],
+          [int x = 0; int y = __builtin_bswap32(x); return y;])],
           [gcry_cv_have_builtin_bswap32=yes])])
 if test "$gcry_cv_have_builtin_bswap32" = "yes" ; then
    AC_DEFINE(HAVE_BUILTIN_BSWAP32,1,
@@ -794,8 +794,8 @@ fi
 AC_CACHE_CHECK(for __builtin_bswap64,
        [gcry_cv_have_builtin_bswap64],
        [gcry_cv_have_builtin_bswap64=no
-        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
-          [[int foo(int x) { return __builtin_bswap64(x); }]])],
+        AC_LINK_IFELSE([AC_LANG_PROGRAM([],
+          [long long x = 0; long long y = __builtin_bswap64(x); return y;])],
           [gcry_cv_have_builtin_bswap64=yes])])
 if test "$gcry_cv_have_builtin_bswap64" = "yes" ; then
    AC_DEFINE(HAVE_BUILTIN_BSWAP64,1,

-----------------------------------------------------------------------

Summary of changes:
 configure.ac |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)


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