From c25084921670dfe33a0871ee7b94c102fea0ea3a Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 14 May 1998 04:10:39 +0000
Subject: prototypes

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/v1_1r@210 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 configure.in | 51 +++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 45 insertions(+), 6 deletions(-)

(limited to 'configure.in')

diff --git a/configure.in b/configure.in
index 84aabbe496..2665d083df 100644
--- a/configure.in
+++ b/configure.in
@@ -72,6 +72,50 @@ AC_PROG_MAKE_SET
 # checks for UNIX variants that set C preprocessor variables
 AC_MINIX
 
+AC_CHECK_SIZEOF(int)
+AC_CHECK_SIZEOF(long)
+AC_CHECK_SIZEOF(void*)
+
+AC_MSG_CHECKING(for prototypes)
+AC_CACHE_VAL(rb_cv_have_prototypes,
+  [AC_TRY_COMPILE([int foo(int x) { return 0; }], [return foo(10);],
+	rb_cv_have_prototypes=yes,
+	rb_cv_have_prototypes=no)])
+AC_MSG_RESULT($rb_cv_have_prototypes)
+if test "$rb_cv_have_prototypes" = yes; then
+  AC_DEFINE(HAVE_PROTOTYPES)
+fi
+
+AC_MSG_CHECKING(for variable length prototypes and stdarg.h)
+AC_CACHE_VAL(rb_cv_stdarg,
+  [AC_TRY_COMPILE([
+#include <stdarg.h>
+int foo(int x, ...) {
+	va_list va;
+	va_start(va, x);
+	va_arg(va, int);
+	va_arg(va, char *);
+	va_arg(va, double);
+	return 0;
+}
+], [return foo(10, "", 3.14);],
+	rb_cv_stdarg=yes,
+	rb_cv_stdarg=no)])
+AC_MSG_RESULT($rb_cv_stdarg)
+if test "$rb_cv_stdarg" = yes; then
+  AC_DEFINE(HAVE_STDARG_PROTOTYPES)
+fi
+
+AC_MSG_CHECKING(for gcc attribute noreturn)
+AC_CACHE_VAL(rb_cv_have_attr_noreturn,
+  [AC_TRY_COMPILE([void exit(int x) __attribute__ ((noreturn));], [],
+	rb_cv_have_attr_noreturn=yes,
+	rb_cv_have_attr_noreturn=no)])
+AC_MSG_RESULT($rb_cv_have_attr_noreturn)
+if test "$rb_cv_have_attr_noreturn" = yes; then
+  AC_DEFINE(HAVE_ATTR_NORETURN)
+fi
+
 dnl Checks for libraries.
 case "$host_os" in
 nextstep*)	;;
@@ -88,8 +132,7 @@ AC_HEADER_DIRENT
 AC_HEADER_STDC
 AC_CHECK_HEADERS(stdlib.h unistd.h limits.h sys/file.h sys/ioctl.h pwd.h \
 		 sys/select.h sys/time.h sys/times.h sys/param.h sys/wait.h\
-		 syscall.h a.out.h string.h utime.h memory.h\
-		 varargs.h stdarg.h)
+		 syscall.h a.out.h string.h utime.h memory.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_UID_T
@@ -100,10 +143,6 @@ AC_STRUCT_ST_BLOCKS
 LIBOBJS="$save_LIBOBJS"
 AC_STRUCT_ST_RDEV
 
-AC_CHECK_SIZEOF(int)
-AC_CHECK_SIZEOF(long)
-AC_CHECK_SIZEOF(void*)
-
 dnl Checks for library functions.
 AC_TYPE_GETGROUPS
 AC_TYPE_SIGNAL
-- 
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