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authorLudovic Courtès <ludo@gnu.org>2009-11-16 23:40:28 +0100
committerLudovic Courtès <ludo@gnu.org>2009-11-17 23:13:58 +0100
commitf29ded4b67ca5d750863ba24d16456ed8f730d0a (patch)
treeefa4a7794f98c8d8f57ddf91210f5af69b090743 /m4/warnings.m4
parente614d37577b63766613dac95d76e9f7826b528d9 (diff)
downloadguile-f29ded4b67ca5d750863ba24d16456ed8f730d0a.tar.gz
Use Gnulib's `warning' module.
* m4/gnulib-cache.m4: Add `warnings'. * configure.ac: Use `gl_WARN_ADD' to check whether compiler flags are supported. * libguile/Makefile.am (libguile_la_LIBADD): Add $(LTLIBICONV). (libguile_la_LDFLAGS): Add $(INET_NTOP_LIB) $(INET_PTON_LIB).
Diffstat (limited to 'm4/warnings.m4')
-rw-r--r--m4/warnings.m444
1 files changed, 44 insertions, 0 deletions
diff --git a/m4/warnings.m4 b/m4/warnings.m4
new file mode 100644
index 000000000..c32cf4ed6
--- /dev/null
+++ b/m4/warnings.m4
@@ -0,0 +1,44 @@
+# warnings.m4 serial 2
+dnl Copyright (C) 2008 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_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
+# ----------------------------------------------------
+# Provide the functionality of AS_VAR_IF if Autoconf does not have it.
+m4_ifdef([AS_VAR_IF],
+[m4_copy([AS_VAR_IF], [gl_AS_VAR_IF])],
+[m4_define([gl_AS_VAR_IF],
+[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
+
+# 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
+gl_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
+])