| Dmitry V. Levin | 918e49b | 2010-09-09 17:41:15 +0000 | [diff] [blame] | 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 |
| Dmitry V. Levin | 916aded | 2010-09-09 17:36:36 +0000 | [diff] [blame] | 36 | ]) |