| # warnings.m4 serial 2 |
| dnl Copyright (C) 2008, 2009, 2010 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_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 |
| 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 |
| ]) |
