- (dtucker) [configure.ac] Bug #321: Add cross-compile support to configure.

Parts by chua at ayrnetworks.com, astrand at lysator.liu.se and me.  ok djm@

ChangeLog

@@ -11,6 +11,8 @@
    SSH2_MSG_USERAUTH_BANNER messages.  Note that this will not happen with
    SSH2 kbdint authentication, which need to be dealt with separately.  ok djm@
  - (dtucker) [session.c] Bug #927: make .hushlogin silent again.  ok djm@
+ - (dtucker) [configure.ac] Bug #321: Add cross-compile support to configure.
+   Parts by chua at ayrnetworks.com, astrand at lysator.liu.se and me.  ok djm@
 
 20040830
  - (dtucker) [session.c openbsd-compat/bsd-cygwin_util.{c,h}] Bug #915: only
@@ -1730,4 +1732,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.3545 2004/09/11 13:09:53 dtucker Exp $
+$Id: ChangeLog,v 1.3546 2004/09/11 13:26:37 dtucker Exp $

configure.ac

@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.228 2004/08/29 11:18:09 dtucker Exp $
+# $Id: configure.ac,v 1.229 2004/09/11 13:26:37 dtucker Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -506,7 +506,7 @@ AC_ARG_WITH(libs,
 )
 
 AC_MSG_CHECKING(compiler and flags for sanity)
-AC_TRY_RUN([
+AC_RUN_IFELSE([
 #include <stdio.h>
 int main(){exit(0);}
 	],
@@ -514,7 +514,8 @@ int main(){exit(0);}
 	[
 		AC_MSG_RESULT(no)
 		AC_MSG_ERROR([*** compiler cannot create working executables, check config.log ***])
-	]
+	],
+	[	AC_MSG_WARN([cross compiling: not checking compiler sanity]) ]
 )
 
 # Checks for header files.
@@ -647,7 +648,7 @@ AC_ARG_WITH(zlib-version-check,
 )
 
 AC_MSG_CHECKING(for zlib 1.1.4 or greater)
-AC_TRY_RUN([
+AC_RUN_IFELSE([
 #include <zlib.h>
 int main()
 {
@@ -672,7 +673,8 @@ If you are in doubt, upgrade zlib to version 1.1.4 or greater.])
 	  else
 		AC_MSG_WARN([zlib version may have security problems])
 	  fi
-	]
+	],
+	[	AC_MSG_WARN([cross compiling: not checking zlib version]) ]
 )
 
 dnl UnixWare 2.x
@@ -726,7 +728,7 @@ AC_EGREP_CPP(FOUNDIT,
 )
 
 AC_MSG_CHECKING([whether struct dirent allocates space for d_name])
-AC_TRY_RUN(
+AC_RUN_IFELSE(
 	[
 #include <sys/types.h>
 #include <dirent.h>
@@ -736,6 +738,10 @@ int main(void){struct dirent d;exit(sizeof(d.d_name)<=sizeof(char));}
 	[
 		AC_MSG_RESULT(no)
 		AC_DEFINE(BROKEN_ONE_BYTE_DIRENT_D_NAME)
+	],
+	[ 
+		AC_MSG_WARN([cross compiling: assuming BROKEN_ONE_BYTE_DIRENT_D_NAME])
+		AC_DEFINE(BROKEN_ONE_BYTE_DIRENT_D_NAME)
 	]
 )
 
@@ -895,28 +901,30 @@ AC_CHECK_DECLS(h_errno, , ,[#include <netdb.h>])
 AC_CHECK_FUNCS(setresuid, [
 	dnl Some platorms have setresuid that isn't implemented, test for this
 	AC_MSG_CHECKING(if setresuid seems to work)
-	AC_TRY_RUN([
+	AC_RUN_IFELSE([
 #include <stdlib.h>
 #include <errno.h>
 int main(){errno=0; setresuid(0,0,0); if (errno==ENOSYS) exit(1); else exit(0);}
 		],
 		[AC_MSG_RESULT(yes)],
 		[AC_DEFINE(BROKEN_SETRESUID)
-		 AC_MSG_RESULT(not implemented)]
+		 AC_MSG_RESULT(not implemented)],
+		[AC_MSG_WARN([cross compiling: not checking setresuid])]
 	)
 ])
 
 AC_CHECK_FUNCS(setresgid, [
 	dnl Some platorms have setresgid that isn't implemented, test for this
 	AC_MSG_CHECKING(if setresgid seems to work)
-	AC_TRY_RUN([
+	AC_RUN_IFELSE([
 #include <stdlib.h>
 #include <errno.h>
 int main(){errno=0; setresgid(0,0,0); if (errno==ENOSYS) exit(1); else exit(0);}
 		],
 		[AC_MSG_RESULT(yes)],
 		[AC_DEFINE(BROKEN_SETRESGID)
-		 AC_MSG_RESULT(not implemented)]
+		 AC_MSG_RESULT(not implemented)],
+		[AC_MSG_WARN([cross compiling: not checking setresuid])]
 	)
 ])
 
@@ -942,7 +950,7 @@ AC_CHECK_FUNC(getpagesize,
 # Check for broken snprintf
 if test "x$ac_cv_func_snprintf" = "xyes" ; then
 	AC_MSG_CHECKING([whether snprintf correctly terminates long strings])
-	AC_TRY_RUN(
+	AC_RUN_IFELSE(
 		[
 #include <stdio.h>
 int main(void){char b[5];snprintf(b,5,"123456789");exit(b[4]!='\0');}
@@ -952,7 +960,8 @@ int main(void){char b[5];snprintf(b,5,"123456789");exit(b[4]!='\0');}
 			AC_MSG_RESULT(no)
 			AC_DEFINE(BROKEN_SNPRINTF)
 			AC_MSG_WARN([****** Your snprintf() function is broken, complain to your vendor])
-		]
+		],
+		[ AC_MSG_WARN([cross compiling: Assuming working snprintf()]) ]
 	)
 fi
 
@@ -1213,7 +1222,7 @@ AC_TRY_LINK_FUNC(RAND_add, AC_DEFINE(HAVE_OPENSSL),
 
 # Determine OpenSSL header version
 AC_MSG_CHECKING([OpenSSL header version])
-AC_TRY_RUN(
+AC_RUN_IFELSE(
 	[
 #include <stdio.h>
 #include <string.h>
@@ -1240,12 +1249,15 @@ int main(void) {
 	[
 		AC_MSG_RESULT(not found)
 		AC_MSG_ERROR(OpenSSL version header not found.)
+	],
+	[
+		AC_MSG_WARN([cross compiling: not checking])
 	]
 )
 
 # Determine OpenSSL library version
 AC_MSG_CHECKING([OpenSSL library version])
-AC_TRY_RUN(
+AC_RUN_IFELSE(
 	[
 #include <stdio.h>
 #include <string.h>
@@ -1273,12 +1285,15 @@ int main(void) {
 	[
 		AC_MSG_RESULT(not found)
 		AC_MSG_ERROR(OpenSSL library not found.)
+	],
+	[
+		AC_MSG_WARN([cross compiling: not checking])
 	]
 )
 
 # Sanity check OpenSSL headers
 AC_MSG_CHECKING([whether OpenSSL's headers match the library])
-AC_TRY_RUN(
+AC_RUN_IFELSE(
 	[
 #include <string.h>
 #include <openssl/opensslv.h>
@@ -1292,6 +1307,9 @@ int main(void) { exit(SSLeay() == OPENSSL_VERSION_NUMBER ? 0 : 1); }
 		AC_MSG_ERROR([Your OpenSSL headers do not match your library.
 Check config.log for details.
 Also see contrib/findssl.sh for help identifying header/library mismatches.])
+	],
+	[
+		AC_MSG_WARN([cross compiling: not checking])
 	]
 )
 
@@ -1312,7 +1330,7 @@ fi
 
 # Check wheter OpenSSL seeds itself
 AC_MSG_CHECKING([whether OpenSSL's PRNG is internally seeded])
-AC_TRY_RUN(
+AC_RUN_IFELSE(
 	[
 #include <string.h>
 #include <openssl/rand.h>
@@ -1327,6 +1345,12 @@ int main(void) { exit(RAND_status() == 1 ? 0 : 1); }
 		# Default to use of the rand helper if OpenSSL doesn't
 		# seed itself
 		USE_RAND_HELPER=yes
+	],
+	[
+		AC_MSG_WARN([cross compiling: assuming yes])
+		# This is safe, since all recent OpenSSL versions will
+		# complain at runtime if not seeded correctly. 
+		OPENSSL_SEEDS_ITSELF=yes
 	]
 )
 
@@ -1893,7 +1917,7 @@ if test "x$ac_cv_have_int64_t" = "xno" -a \
 	exit 1;
 else
 dnl test snprintf (broken on SCO w/gcc)
-	AC_TRY_RUN(
+	AC_RUN_IFELSE(
 		[
 #include <stdio.h>
 #include <string.h>
@@ -1917,7 +1941,8 @@ main()
 #else
 main() { exit(0); }
 #endif
-		], [ true ], [ AC_DEFINE(BROKEN_SNPRINTF) ]
+		], [ true ], [ AC_DEFINE(BROKEN_SNPRINTF) ],
+		AC_MSG_WARN([cross compiling: Assuming working snprintf()])
 	)
 fi
 
@@ -2022,13 +2047,14 @@ fi
 dnl make sure we're using the real structure members and not defines
 AC_CACHE_CHECK([for msg_accrights field in struct msghdr],
 		ac_cv_have_accrights_in_msghdr, [
-	AC_TRY_RUN(
+	AC_COMPILE_IFELSE(
 		[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
 int main() {
 #ifdef msg_accrights
+#error "msg_accrights is a macro"
 exit(1);
 #endif
 struct msghdr m;
@@ -2046,13 +2072,14 @@ fi
 
 AC_CACHE_CHECK([for msg_control field in struct msghdr],
 		ac_cv_have_control_in_msghdr, [
-	AC_TRY_RUN(
+	AC_COMPILE_IFELSE(
 		[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
 int main() {
 #ifdef msg_control
+#error "msg_control is a macro"
 exit(1);
 #endif
 struct msghdr m;
@@ -2386,6 +2413,10 @@ if test ! -z "$MAIL" ; then
 	AC_DEFINE_UNQUOTED(MAIL_DIRECTORY, "$maildir")
 fi
 
+if test ! -z "$cross_compiling"; then
+	AC_MSG_WARN([cross compiling: Disabling /dev/ptmx test])
+	disable_ptmx_check=yes
+fi
 if test -z "$no_dev_ptmx" ; then
 	if test "x$disable_ptmx_check" != "xyes" ; then
 		AC_CHECK_FILE("/dev/ptmx",
@@ -2396,12 +2427,17 @@ if test -z "$no_dev_ptmx" ; then
 		)
 	fi
 fi
-AC_CHECK_FILE("/dev/ptc",
+
-	[
+if test -z "$cross_compiling"; then
-		AC_DEFINE_UNQUOTED(HAVE_DEV_PTS_AND_PTC)
+	AC_CHECK_FILE("/dev/ptc",
-		have_dev_ptc=1
+		[
-	]
+			AC_DEFINE_UNQUOTED(HAVE_DEV_PTS_AND_PTC)
-)
+			have_dev_ptc=1
+		]
+	)
+else
+	AC_MSG_WARN([cross compiling: Disabling /dev/ptc test])
+fi
 
 # Options from here on. Some of these are preset by platform above
 AC_ARG_WITH(mantype,
@@ -2498,13 +2534,16 @@ fi
 # check for /etc/default/login and use it if present.
 AC_ARG_ENABLE(etc-default-login,
 	[  --disable-etc-default-login       Disable using PATH from /etc/default/login [no]],,
-[
+	[ AC_CHECK_FILE("/etc/default/login",
-AC_CHECK_FILE("/etc/default/login", [ external_path_file=/etc/default/login ])
+	    [ external_path_file=/etc/default/login ])
 
-if test "x$external_path_file" = "x/etc/default/login"; then
+	if test ! -z "$cross_compiling"; then
-	AC_DEFINE(HAVE_ETC_DEFAULT_LOGIN)
+		AC_MSG_WARN([cross compiling: Disabling /etc/default/login test])
-fi
+	elif test "x$external_path_file" = "x/etc/default/login"; then
-])
+		AC_DEFINE(HAVE_ETC_DEFAULT_LOGIN)
+	fi
+	]
+)
 
 dnl BSD systems use /etc/login.conf so --with-default-path= has no effect
 if test $ac_cv_func_login_getcapbool = "yes" -a \