2 dnl Copyright (C) 2008 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.
7 dnl From Simon Josefsson
9 # gl_AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
10 # ----------------------------------------------------
11 # Provide the functionality of AS_VAR_IF if Autoconf does not have it.
13 [m4_copy([AS_VAR_IF], [gl_AS_VAR_IF])],
14 [m4_define([gl_AS_VAR_IF],
15 [AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
17 # gl_AS_VAR_APPEND(VAR, VALUE)
18 # ----------------------------
19 # Provide the functionality of AS_VAR_APPEND if Autoconf does not have it.
20 m4_ifdef([AS_VAR_APPEND],
21 [m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])],
22 [m4_define([gl_AS_VAR_APPEND],
23 [AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
25 # gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS])
26 # ------------------------------------------------
27 # Adds parameter to WARN_CFLAGS if the compiler supports it. For example,
28 # gl_WARN_ADD([-Wparentheses]).
29 AC_DEFUN([gl_WARN_ADD],
30 [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl
31 AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [
34 AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
35 [AS_VAR_SET([gl_Warn], [yes])],
36 [AS_VAR_SET([gl_Warn], [no])])
39 AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl
40 gl_AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])])
41 AS_VAR_POPDEF([gl_Flags])dnl
42 AS_VAR_POPDEF([gl_Warn])dnl
43 m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl
46 # gl_WARN_SUPPORTED(VARIABLE)
47 # ----------------------
48 # Add all supported warning parameters to variable VARIABLE
50 AC_DEFUN([gl_WARN_SUPPORTED],
52 # List of all supported warning parameters according to GCC 4.3.2 manual.
60 -Wmissing-include-dirs \
70 -Wtraditional-conversion \
71 -Wdeclaration-after-statement \
74 -Wunsafe-loop-optimizations \
86 -Wold-style-definition \
87 -Wmissing-prototypes \
88 -Wmissing-declarations \
90 -Wmissing-format-attribute \
100 -Wvolatile-register-var \
101 -Wdisabled-optimization \
103 -Woverlength-strings \
109 # gl_WARN_COMPLEMENT(OUTVAR, LISTVAR, REMOVEVAR)
110 # ----------------------
111 # Copy LISTVAR to OUTVAR except for the entries in REMOVEVAR.
112 # Elements separated by whitespace. In set logic terms, the function
113 # does OUTVAR = LISTVAR \ REMOVEVAR.
114 AC_DEFUN([gl_WARN_COMPLEMENT],
120 *" $w "* | *" $w" | "$w "*)