Importing libextractor.

1 files changed, 44 insertions, 0 deletions

diff --git a/acinclude.m4 b/acinclude.m4
new file mode 100644
index 0000000..cda05d7
--- /dev/null
+++ b/acinclude.m4
@@ -0,0 +1,44 @@
+define(GNUPG_CHECK_ENDIAN,
+  [ if test "$cross_compiling" = yes; then
+        AC_MSG_WARN(cross compiling; assuming big endianess)
+    fi
+    AC_MSG_CHECKING(endianess)
+    AC_CACHE_VAL(gnupg_cv_c_endian,
+      [ gnupg_cv_c_endian=unknown
+        # See if sys/param.h defines the BYTE_ORDER macro.
+        AC_TRY_COMPILE([#include <sys/types.h>
+        #include <sys/param.h>], [
+        #if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
+         bogus endian macros
+        #endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
+        AC_TRY_COMPILE([#include <sys/types.h>
+        #include <sys/param.h>], [
+        #if BYTE_ORDER != BIG_ENDIAN
+         not big endian
+        #endif], gnupg_cv_c_endian=big, gnupg_cv_c_endian=little)])
+        if test "$gnupg_cv_c_endian" = unknown; then
+            AC_TRY_RUN([main () {
+              /* Are we little or big endian?  From Harbison&Steele.  */
+              union
+              {
+                long l;
+                char c[sizeof (long)];
+              } u;
+              u.l = 1;
+              exit (u.c[sizeof (long) - 1] == 1);
+              }],
+              gnupg_cv_c_endian=little,
+              gnupg_cv_c_endian=big,
+              gnupg_cv_c_endian=big
+            )
+        fi
+      ])
+    AC_MSG_RESULT([$gnupg_cv_c_endian])
+    if test "$gnupg_cv_c_endian" = little; then
+      AC_DEFINE(LITTLE_ENDIAN_HOST,1,
+                [Defined if the host has little endian byte ordering])
+    else
+      AC_DEFINE(BIG_ENDIAN_HOST,1,
+                [Defined if the host has big endian byte ordering])
+    fi
+  ])