Mercurial > hg > octave-lojdl > gnulib-hg

comparison m4/warnings.m4 @ 16723:376ee9a0ad8d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
warnings.m4: check the compiler, not the preprocessor * m4/warnings.m4 (gl_WARN_ADD): Use the compiler, not the preprocessor. Depend on the current AC_LANG for the cache variables.
author Akim Demaille <akim@lrde.epita.fr>
date Thu, 29 Mar 2012 15:29:37 +0200
parents 8250f2777afc
children b7fd03492209
comparison
equal deleted inserted replaced
16722:748fa2785611 16723:376ee9a0ad8d
1 # warnings.m4 serial 5 1 # warnings.m4 serial 6
2 dnl Copyright (C) 2008-2012 Free Software Foundation, Inc. 2 dnl Copyright (C) 2008-2012 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation 3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it, 4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved. 5 dnl with or without modifications, as long as this notice is preserved.
6 6
19 # Adds parameter to WARN_CFLAGS if the compiler supports it. For example, 19 # Adds parameter to WARN_CFLAGS if the compiler supports it. For example,
20 # gl_WARN_ADD([-Wparentheses]). 20 # gl_WARN_ADD([-Wparentheses]).
21 AC_DEFUN([gl_WARN_ADD], 21 AC_DEFUN([gl_WARN_ADD],
22 dnl FIXME: gl_Warn must be used unquoted until we can assume 22 dnl FIXME: gl_Warn must be used unquoted until we can assume
23 dnl autoconf 2.64 or newer. 23 dnl autoconf 2.64 or newer.
24 [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl 24 [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl
25 AC_CACHE_CHECK([whether compiler handles $1], m4_defn([gl_Warn]), [ 25 AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [
26 gl_save_CPPFLAGS="$CPPFLAGS" 26 gl_save_compiler_FLAGS="$_AC_LANG_PREFIX[]FLAGS"
27 CPPFLAGS="${CPPFLAGS} $1" 27 CPPFLAGS="${CPPFLAGS} $1"
28 AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], 28 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
29 [AS_VAR_SET(gl_Warn, [yes])], 29 [AS_VAR_SET(gl_Warn, [yes])],
30 [AS_VAR_SET(gl_Warn, [no])]) 30 [AS_VAR_SET(gl_Warn, [no])])
31 CPPFLAGS="$gl_save_CPPFLAGS" 31 _AC_LANG_PREFIX[]FLAGS="$gl_save_compiler_FLAGS"
32 ]) 32 ])
33 AS_VAR_IF(gl_Warn, [yes], 33 AS_VAR_IF(gl_Warn, [yes],
34 [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])]) 34 [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])])
35 AS_VAR_POPDEF([gl_Warn])dnl 35 AS_VAR_POPDEF([gl_Warn])dnl
36 m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl 36 m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl