1 # warnings.m4 serial 2 2 dnl Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. 3 dnl This file is free software; the Free Software Foundation 4 dnl gives unlimited permission to copy and/or distribute it, 5 dnl with or without modifications, as long as this notice is preserved. 6 7 dnl From Simon Josefsson 8 9 # gl_AS_VAR_APPEND(VAR, VALUE) 10 # ---------------------------- 11 # Provide the functionality of AS_VAR_APPEND if Autoconf does not have it. 12 m4_ifdef([AS_VAR_APPEND], 13 [m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])], 14 [m4_define([gl_AS_VAR_APPEND], 15 [AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) 16 17 # gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS]) 18 # ------------------------------------------------ 19 # Adds parameter to WARN_CFLAGS if the compiler supports it. For example, 20 # gl_WARN_ADD([-Wparentheses]). 21 AC_DEFUN([gl_WARN_ADD], 22 [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl 23 AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [ 24 save_CPPFLAGS="$CPPFLAGS" 25 CPPFLAGS="${CPPFLAGS} $1" 26 AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], 27 [AS_VAR_SET([gl_Warn], [yes])], 28 [AS_VAR_SET([gl_Warn], [no])]) 29 CPPFLAGS="$save_CPPFLAGS" 30 ]) 31 AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl 32 AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])]) 33 AS_VAR_POPDEF([gl_Flags])dnl 34 AS_VAR_POPDEF([gl_Warn])dnl 35 m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl 36 ]) 37
