Bug#283640: dpkg: [PATCH] cross build

[NIIBE Yutaka <gniibe@fsij.org>]

Package: dpkg
Version: 1.10.25
Severity: wishlist

Cross-building (with dpkg-cross), I encountered a problem.
Following patch fix the problem.

Problem is that in the configure script, AC_TRY_RUN is not
enclosed with AC_CACHE_VAL.  Enclosing with AC_CACHE_VAL,
we can supply configure variable to avoid AC_TRY_RUN.

Note that you need regenerate configure after applying this patch.

  * Enclose AC_TRY_RUN with AC_CACHE_VAL.

 -- NIIBE Yutaka <gniibe@fsij.org>  Tue, 30 Nov 2004 20:53:43 +0900

--- dpkg-1.10.25/configure.in	2004-11-12 05:10:47.000000000 +0900
+++ dpkg-1.10.25/configure.in	2004-11-30 20:55:56.000000000 +0900
@@ -250,21 +250,26 @@
 # OpenBSD passes AC_TRY_COMPILE for va_copy even though 
 # it doesn't seem to exist, which is odd. We need to use
 # AC_TRY_RUN.
-AC_TRY_RUN([
-#include <stdarg.h>
-main(){
-va_list v1,v2;
-va_copy(v1, v2);
-exit(0);}
-], [AC_MSG_RESULT(yes)
-AC_DEFINE(HAVE_VA_COPY,,[Whether the va_copy macro exists])],[AC_MSG_RESULT(no)
-AC_MSG_CHECKING([for va_list assignment copy])
-AC_TRY_COMPILE([
-#include <stdarg.h>
-],[
-va_list v1,v2;
-v1 = v2;
-], AC_MSG_RESULT(yes),AC_MSG_ERROR(no))])
+AC_CACHE_VAL(dpkg_cv_va_copy,
+    AC_TRY_RUN([
+    #include <stdarg.h>
+    main(){
+    va_list v1,v2;
+    va_copy(v1, v2);
+    exit(0);}
+    ],dpkg_cv_va_copy=yes,dpkg_cv_va_copy=no,dpkg_cv_va_copy=no))
+AC_MSG_RESULT($dpkg_cv_va_copy)
+if test "$dpkg_cv_va_copy" = yes; then
+    AC_DEFINE(HAVE_VA_COPY,,[Whether the va_copy macro exists])
+else
+    AC_MSG_CHECKING([for va_list assignment copy])
+    AC_TRY_COMPILE([
+    #include <stdarg.h>
+    ],[
+    va_list v1,v2;
+    v1 = v2;
+    ], AC_MSG_RESULT(yes),AC_MSG_ERROR(no))
+fi
 
 DPKG_C_GCC_ATTRIBUTE([,,],supported,[int x],[,,],ATTRIB,[Define if function attributes a la GCC 2.5 and higher are available.],
   DPKG_C_GCC_ATTRIBUTE(noreturn,noreturn,[int x],noreturn,NORETURN,[Define if nonreturning functions a la GCC 2.5 and higher are available.])