diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 4bbd686c..16f6a21b 100644 --- a/configure.ac +++ b/configure.ac @@ -958,6 +958,24 @@ fi # +# Check whether the compiler supports the GCC style packed attribute +# +AC_CACHE_CHECK([whether the GCC style packed attribute is supported], + [gcry_cv_gcc_attribute_packed], + [gcry_cv_gcc_attribute_packed=no + AC_COMPILE_IFELSE([AC_LANG_SOURCE( + [[struct foo_s { char a; long b; } __attribute__ ((packed)); + enum bar { + FOO = 1 / (sizeof(struct foo_s) == (sizeof(char) + sizeof(long))), + };]])], + [gcry_cv_gcc_attribute_packed=yes])]) +if test "$gcry_cv_gcc_attribute_packed" = "yes" ; then + AC_DEFINE(HAVE_GCC_ATTRIBUTE_PACKED,1, + [Defined if a GCC style "__attribute__ ((packed))" is supported]) +fi + + +# # Check whether the compiler supports 'asm' or '__asm__' keyword for # assembler blocks. # |