diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 653d7ed..e1f167f 100644 --- a/configure.ac +++ b/configure.ac @@ -167,6 +167,20 @@ AC_CHECK_FUNCS([flockfile]) # Checks for typedefs, structures, and compiler characteristics. AC_C_CONST +# +# Check whether the compiler supports the GCC style aligned attribute +# +AC_CACHE_CHECK([whether the GCC style aligned attribute is supported], + [gcry_cv_gcc_attribute_aligned], + [gcry_cv_gcc_attribute_aligned=no + AC_COMPILE_IFELSE([AC_LANG_SOURCE( + [[struct { int a; } foo __attribute__ ((aligned (16)));]])], + [gcry_cv_gcc_attribute_aligned=yes])]) +if test "$gcry_cv_gcc_attribute_aligned" = "yes" ; then + AC_DEFINE(HAVE_GCC_ATTRIBUTE_ALIGNED,1, + [Defined if a GCC style "__attribute__ ((aligned (n))" is supported]) +fi + # Check for thread library. # @@ -278,5 +292,12 @@ echo " Revision: mym4_revision (mym4_revision_dec) Platform: $host - " +if test "$gcry_cv_gcc_attribute_aligned" != "yes" ; then +cat <<G10EOF +*** +*** Please not that your compiler does not support the GCC style +*** aligned attribute. Using this software may evoke bus errors. +*** +G10EOF +fi |