Index: bison/src/bison/2.4.1/bison-2.4.1-src/m4/warnings.m4 |
=================================================================== |
--- bison/src/bison/2.4.1/bison-2.4.1-src/m4/warnings.m4 (revision 0) |
+++ bison/src/bison/2.4.1/bison-2.4.1-src/m4/warnings.m4 (revision 0) |
@@ -0,0 +1,44 @@ |
+# warnings.m4 serial 2 |
+dnl Copyright (C) 2008 Free Software Foundation, Inc. |
+dnl This file is free software; the Free Software Foundation |
+dnl gives unlimited permission to copy and/or distribute it, |
+dnl with or without modifications, as long as this notice is preserved. |
+ |
+dnl From Simon Josefsson |
+ |
+# gl_AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH]) |
+# ---------------------------------------------------- |
+# Provide the functionality of AS_VAR_IF if Autoconf does not have it. |
+m4_ifdef([AS_VAR_IF], |
+[m4_copy([AS_VAR_IF], [gl_AS_VAR_IF])], |
+[m4_define([gl_AS_VAR_IF], |
+[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])]) |
+ |
+# gl_AS_VAR_APPEND(VAR, VALUE) |
+# ---------------------------- |
+# Provide the functionality of AS_VAR_APPEND if Autoconf does not have it. |
+m4_ifdef([AS_VAR_APPEND], |
+[m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])], |
+[m4_define([gl_AS_VAR_APPEND], |
+[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) |
+ |
+# gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS]) |
+# ------------------------------------------------ |
+# Adds parameter to WARN_CFLAGS if the compiler supports it. For example, |
+# gl_WARN_ADD([-Wparentheses]). |
+AC_DEFUN([gl_WARN_ADD], |
+[AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl |
+AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [ |
+ save_CPPFLAGS="$CPPFLAGS" |
+ CPPFLAGS="${CPPFLAGS} $1" |
+ AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], |
+ [AS_VAR_SET([gl_Warn], [yes])], |
+ [AS_VAR_SET([gl_Warn], [no])]) |
+ CPPFLAGS="$save_CPPFLAGS" |
+]) |
+AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl |
+gl_AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])]) |
+AS_VAR_POPDEF([gl_Flags])dnl |
+AS_VAR_POPDEF([gl_Warn])dnl |
+m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl |
+]) |