* configure.in: Only invoke AC_FUNC_SETPGRP if not cross-compiling.

       Check for SETPGRP_VOID separately if cross-compiling and ISO C
       headers are available.

1 files changed, 18 insertions, 1 deletions

diff --git a/gdb/configure.in b/gdb/configure.in
index da78509fc76..f676877eaa1 100644
--- a/gdb/configure.in
+++ b/gdb/configure.in
@@ -134,7 +134,24 @@ AC_C_CONST
 AC_CHECK_FUNCS(setpgid setpgrp sbrk sigaction isascii bzero bcopy btowc poll sigprocmask)
 AC_FUNC_VFORK
 AC_FUNC_ALLOCA
-AC_FUNC_SETPGRP
+dnl AC_FUNC_SETPGRP does not work when cross compiling
+dnl Instead, assume we will have a prototype for setpgrp if cross compiling.
+if test "$cross_compiling" = no; then
+  AC_FUNC_SETPGRP
+else
+  AC_CACHE_CHECK([whether setpgrp takes no argument], ac_cv_func_setpgrp_void,
+    [AC_TRY_COMPILE([
+#include <unistd.h>
+], [
+  if (setpgrp(1,1) == -1)
+    exit (0);
+  else
+    exit (1);
+], ac_cv_func_setpgrp_void=no, ac_cv_func_setpgrp_void=yes)])
+if test $ac_cv_func_setpgrp_void = yes; then
+  AC_DEFINE(SETPGRP_VOID, 1)
+fi
+fi
 
 # Check if sigsetjmp is available.  Using AC_CHECK_FUNCS won't do
 # since sigsetjmp might only be defined as a macro.