Automatically generate FUNCPROTO and NARROWPROTO defines in Xfuncproto.h.

1 files changed, 135 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 1ffc87f..e89e4c8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,6 +2,37 @@ AC_PREREQ([2.57])
 AC_INIT([Xproto], [7.0.2], [https://bugs.freedesktop.org/enter_bug.cgi?product=xorg])
 AM_INIT_AUTOMAKE([foreign dist-bzip2])
 
+AC_CONFIG_HEADER([do-not-use-config.h])
+AC_CONFIG_HEADER([Xfuncproto.h])
+
+AC_CANONICAL_HOST
+
+m4_ifdef([AS_HELP_STRING], , [m4_define([AS_HELP_STRING], m4_defn([AC_HELP_STRING]))])
+
+# Check for enable/disable options
+AC_ARG_ENABLE(function-prototypes,
+	AS_HELP_STRING([--enable-function-prototypes],
+		       [force function prototypes (default: auto)]),
+	[FUNCPROTO=$enableval], [FUNCPROTO=auto])
+AC_ARG_ENABLE(varargs-prototypes,
+	AS_HELP_STRING([--enable-varargs-prototypes],
+		       [varargs prototypes are supported (default: auto)]),
+	[VAPROTO=$enableval], [VAPROTO=auto])
+AC_ARG_ENABLE(const-prototypes,
+	AS_HELP_STRING([--enable-const-prototypes],
+		       [const is supported (default: auto)]),
+	[CONSTPROTO=$enableval], [CONSTPROTO=auto])
+AC_ARG_ENABLE(nested-prototypes,
+	AS_HELP_STRING([--enable-nested-prototypes],
+		       [nested prototypes are supported (default: auto)]),
+	[NESTEDPROTO=$enableval], [NESTEDPROTO=auto])
+AC_ARG_ENABLE(wide-prototypes,
+	AS_HELP_STRING([--enable-wide-prototypes],
+		       [widen function prototypes (default: auto)]),
+	[WIDEPROTO=$enableval], [WIDEPROTO=auto])
+
+
+# Handle Xpoll.h.in
 fds_bits_found=false;
 
 if test "x$fds_bits_found" = xfalse ; then
@@ -35,6 +66,110 @@ fi
 
 AC_SUBST([USE_FDS_BITS])
 
+
+# Handle Xfuncproto.h
+AC_MSG_CHECKING([whether const prototypes are supported])
+if test "x$CONSTPROTO" = xauto; then
+	case $host_os in
+		linux*)		CONSTPROTO=yes ;;
+		freebsd*)	CONSTPROTO=yes ;;
+		netbsd*)	CONSTPROTO=yes ;;
+		openbsd*)	CONSTPROTO=yes ;;
+		solaris*)	CONSTPROTO=yes ;;
+		*)		CONSTPROTO=no ;;
+	esac
+fi
+AC_MSG_RESULT([$CONSTPROTO])
+
+AC_MSG_CHECKING([whether varargs prototypes are supported])
+if test "x$VAPROTO" = xauto; then
+	case $host_os in
+		linux*)		VAPROTO=yes ;;
+		freebsd*)	VAPROTO=yes ;;
+		netbsd*)	VAPROTO=yes ;;
+		openbsd*)	VAPROTO=yes ;;
+		solaris*)	VAPROTO=yes ;;
+		*)		VAPROTO=no ;;
+	esac
+fi
+AC_MSG_RESULT([$VAPROTO])
+
+AC_MSG_CHECKING([whether nested prototypes are supported])
+if test "x$NESTEDPROTO" = xauto; then
+	case $host_os in
+		linux*)		NESTEDPROTO=yes ;;
+		freebsd*)	NESTEDPROTO=yes ;;
+		netbsd*)	NESTEDPROTO=yes ;;
+		openbsd*)	NESTEDPROTO=yes ;;
+		solaris*)	NESTEDPROTO=yes ;;
+		*)		NESTEDPROTO=no ;;
+	esac
+fi
+AC_MSG_RESULT([$NESTEDPROTO])
+
+AC_MSG_CHECKING([whether to force function prototypes])
+if test "x$FUNCPROTO" = xauto; then
+	case $host_os in
+	    linux*)	FUNCPROTO=yes ;;
+	    freebsd*)	FUNCPROTO=yes ;;
+	    netbsd*)	FUNCPROTO=yes ;;
+	    openbsd*)	FUNCPROTO=yes ;;
+	    *)
+		if test "x$VAPROTO" = xyes && test "x$NESTEDPROTO" = xyes; then
+			FUNCPROTO=yes
+		else
+			FUNCPROTO=no
+		fi
+		;;
+	esac
+fi
+AC_MSG_RESULT([$FUNCPROTO])
+
+# Logic for this was taken from Imake.tmpl
+if test "x$FUNCPROTO" = xyes && test "x$VAPROTO" = xyes && test "x$NESTEDPROTO" = xyes && test "x$CONSTPROTO" = xyes; then
+		AC_DEFINE(FUNCPROTO, [15], [FUNCPROTO])
+else
+  if test "x$FUNCPROTO" = xyes && test "x$VAPROTO" = xyes && test "x$NESTEDPROTO" = xyes; then
+		AC_DEFINE(FUNCPROTO, [11], [FUNCPROTO])
+  else
+    if test "x$FUNCPROTO" = xyes && test "x$NESTEDPROTO" = xyes; then
+		AC_DEFINE(FUNCPROTO, [9], [FUNCPROTO])
+    else
+      if test "x$FUNCPROTO" = xyes && test "x$VAPROTO" = xyes && test "x$CONSTPROTO" = xyes; then
+		AC_DEFINE(FUNCPROTO, [7], [FUNCPROTO])
+      else
+        if test "x$FUNCPROTO" = xyes && test "x$CONSTPROTO" = xyes; then
+		AC_DEFINE(FUNCPROTO, [5], [FUNCPROTO])
+        else
+          if test "x$FUNCPROTO" = xyes && test "x$VAPROTO" = xyes; then
+		AC_DEFINE(FUNCPROTO, [3], [FUNCPROTO])
+          else
+            if test "x$FUNCPROTO" = xyes; then
+		AC_DEFINE(FUNCPROTO, [], [FUNCPROTO])
+            fi
+          fi
+        fi
+      fi
+    fi
+  fi
+fi
+
+AC_MSG_CHECKING([whether to widen function prototypes])
+if test "x$WIDEPROTO" = xauto; then
+	case $host_os in
+		linux*)		WIDEPROTO=no ;;
+		freebsd*)	WIDEPROTO=no ;;
+		netbsd*)	WIDEPROTO=no ;;
+		openbsd*)	WIDEPROTO=no ;;
+		*)		WIDEPROTO=yes ;;
+	esac
+fi
+AC_MSG_RESULT([$WIDEPROTO])
+
+if test "x$WIDEPROTO" = xno; then
+	AC_DEFINE(NARROWPROTO, [], [Narrow prototypes])
+fi
+
 XORG_RELEASE_VERSION
 
 AC_OUTPUT([Makefile