[yelp/wip/kill-gnome-common: 13/16] Use AX_CHECK_ENABLE_DEBUG

[David King <davidk src gnome org>]

commit f9ff538141a64fd07be4de51e4e11b084b6bc655
Author: David King <amigadave amigadave com>
Date:   Wed Jan 28 14:14:29 2015 +0000

    Use AX_CHECK_ENABLE_DEBUG
    
    Drop use of GNOME_DEBUG_CHECK. Disable pedantic and ANSI C warnings, as
    Yelp does not build with them enabled.
    
    https://wiki.gnome.org/Projects/GnomeCommon/Migration

 configure.ac                |    6 +-
 m4/ax_check_enable_debug.m4 |  108 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 111 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 530855d..10889a6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,6 +10,8 @@ AM_MAINTAINER_MODE([enable])
 
 AM_SILENT_RULES([yes])
 
+AX_CHECK_ENABLE_DEBUG([no], [ENABLE_DEBUG])
+
 # Check for programs
 AC_PROG_CC
 AC_PROG_CC_C_O
@@ -42,15 +44,13 @@ AC_SUBST([YELP_CFLAGS])
 AC_SUBST([YELP_LIBS])
 
 
-GNOME_DEBUG_CHECK
 GNOME_COMPILE_WARNINGS([maximum])
 GNOME_MAINTAINER_MODE_DEFINES
 
 MORE_WARN_FLAGS=
 
-if test "x$enable_debug" = "xyes"; then
+if test "x$ax_enable_debug" = "xyes"; then
        AC_DEFINE([YELP_DEBUG],[1],[Enable Yelp debugging])
-       AM_CFLAGS="$AM_CFLAGS -pedantic -ansi"
 fi
 
 dnl NOTE : it appears that some systems do not like it when you use line
diff --git a/m4/ax_check_enable_debug.m4 b/m4/ax_check_enable_debug.m4
new file mode 100644
index 0000000..e433fc6
--- /dev/null
+++ b/m4/ax_check_enable_debug.m4
@@ -0,0 +1,108 @@
+# ===========================================================================
+#   http://www.gnu.org/software/autoconf-archive/ax_check_enable_debug.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_ENABLE_DEBUG([enable by default=yes/info/profile/no], [ENABLE DEBUG VARIABLES ...], [DISABLE 
DEBUG VARIABLES NDEBUG ...])
+#
+# DESCRIPTION
+#
+#   Check for the presence of an --enable-debug option to configure, with
+#   the specified default value used when the option is not present.  Return
+#   the value in the variable $ax_enable_debug.
+#
+#   Specifying 'yes' adds '-g -O0' to the compilation flags for all
+#   languages. Specifying 'info' adds '-g' to the compilation flags.
+#   Specifying 'profile' adds '-g -pg' to the compilation flags and '-pg' to
+#   the linking flags. Otherwise, nothing is added.
+#
+#   Define the variables listed in the second argument if debug is enabled,
+#   defaulting to no variables.  Defines the variables listed in the third
+#   argument if debug is disabled, defaulting to NDEBUG.  All lists of
+#   variables should be space-separated.
+#
+#   If debug is not enabled, ensure AC_PROG_* will not add debugging flags.
+#   Should be invoked prior to any AC_PROG_* compiler checks.
+#
+# LICENSE
+#
+#   Copyright (c) 2011 Rhys Ulerich <rhys ulerich gmail com>
+#   Copyright (c) 2014 Philip Withnall <philip tecnocode co uk>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.
+
+#serial 3
+
+AC_DEFUN([AX_CHECK_ENABLE_DEBUG],[
+    AC_BEFORE([$0],[AC_PROG_CC])dnl
+    AC_BEFORE([$0],[AC_PROG_CXX])dnl
+    AC_BEFORE([$0],[AC_PROG_F77])dnl
+    AC_BEFORE([$0],[AC_PROG_FC])dnl
+
+    AC_MSG_CHECKING(whether to enable debugging)
+
+    m4_define(ax_enable_debug_default,[m4_tolower(m4_normalize(ifelse([$1],,[no],[$1])))])
+    m4_define(ax_enable_debug_vars,[m4_normalize(ifelse([$2],,,[$2]))])
+    m4_define(ax_disable_debug_vars,[m4_normalize(ifelse([$3],,[NDEBUG],[$3]))])
+
+    AC_ARG_ENABLE(debug,
+       [AS_HELP_STRING([--enable-debug]@<:@=ax_enable_debug_default@:>@,[compile with debugging; one of 
yes/info/profile/no])],
+       [],enable_debug=ax_enable_debug_default)
+
+    # empty mean debug yes
+    AS_IF([test "x$enable_debug" = "x"],
+      [enable_debug="yes"])
+
+    # case of debug
+    AS_CASE([$enable_debug],
+      [yes],[
+       AC_MSG_RESULT(yes)
+       CFLAGS="${CFLAGS} -g -O0"
+       CXXFLAGS="${CXXFLAGS} -g -O0"
+       FFLAGS="${FFLAGS} -g -O0"
+       FCFLAGS="${FCFLAGS} -g -O0"
+       OBJCFLAGS="${OBJCFLAGS} -g -O0"
+      ],
+      [info],[
+       AC_MSG_RESULT(info)
+       CFLAGS="${CFLAGS} -g"
+       CXXFLAGS="${CXXFLAGS} -g"
+       FFLAGS="${FFLAGS} -g"
+       FCFLAGS="${FCFLAGS} -g"
+       OBJCFLAGS="${OBJCFLAGS} -g"
+      ],
+      [profile],[
+       AC_MSG_RESULT(profile)
+       CFLAGS="${CFLAGS} -g -pg"
+       CXXFLAGS="${CXXFLAGS} -g -pg"
+       FFLAGS="${FFLAGS} -g -pg"
+       FCFLAGS="${FCFLAGS} -g -pg"
+       OBJCFLAGS="${OBJCFLAGS} -g -pg"
+       LDFLAGS="${LDFLAGS} -pg"
+      ],
+      [
+       AC_MSG_RESULT(no)
+       dnl Ensure AC_PROG_CC/CXX/F77/FC/OBJC will not enable debug flags
+       dnl by setting any unset environment flag variables
+       AS_IF([test "x${CFLAGS+set}" != "xset"],
+         [CFLAGS=""])
+       AS_IF([test "x${CXXFLAGS+set}" != "xset"],
+         [CXXFLAGS=""])
+       AS_IF([test "x${FFLAGS+set}" != "xset"],
+         [FFLAGS=""])
+       AS_IF([test "x${FCFLAGS+set}" != "xset"],
+         [FCFLAGS=""])
+       AS_IF([test "x${OBJCFLAGS+set}" != "xset"],
+         [OBJCFLAGS=""])
+      ])
+
+    dnl Define various variables if debugging is disabled.
+    dnl assert.h is a NOP if NDEBUG is defined, so define it by default.
+    AS_IF([test "x$enable_debug" = "xyes"],
+      [m4_map_args_w(ax_enable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is enabled])])],
+      [m4_map_args_w(ax_disable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is disabled])])])
+    ax_enable_debug=$enable_debug
+])