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# ===========================================================================
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# http://autoconf-archive.cryp.to/ax_check_enable_debug.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# Check for the presence of an --enable-debug option to configure and
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# allow/avoid compiled debugging flags appropriately.
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#
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# AX_CHECK_ENABLE_DEBUG([enable by default=yes/info/profile/no],
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# [ENABLE DEBUG VARIABLES …],
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# [DISABLE DEBUG VARIABLES NDEBUG …])
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#
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# DESCRIPTION
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#
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# Check for the presence of an --enable-debug option to configure, with the
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# specified default value used when the option is not present. Return the
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# value in the variable $ax_enable_debug.
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#
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# Specifying 'yes' adds '-g -O0' to the compilation flags for all languages.
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# Specifying 'info' adds '-g' to the compilation flags. Specifying 'profile'
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# adds '-g -pg' to the compilation flags and '-pg' to the linking flags.
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# Otherwise, nothing is added.
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#
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# Define the variables listed in the second argument if debug is enabled,
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# defaulting to no variables. Defines the variables listed in the third
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# argument if debug is disabled, defaulting to NDEBUG. All lists of
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# variables should be space-separated.
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#
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# If debug is not enabled, ensure AC_PROG_* will not add debugging flags.
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# Should be invoked prior to any AC_PROG_* compiler checks.
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#
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# LAST MODIFICATION
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#
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# 2014-05-12
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#
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# COPYLEFT
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#
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# Copyright (c) 2011 Rhys Ulerich <rhys.ulerich@gmail.com>
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# Copyright © 2014 Philip Withnall <philip@tecnocode.co.uk>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved.
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AC_DEFUN([AX_CHECK_ENABLE_DEBUG],[
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AC_BEFORE([$0],[AC_PROG_CC])dnl
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AC_BEFORE([$0],[AC_PROG_CXX])dnl
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AC_BEFORE([$0],[AC_PROG_F77])dnl
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AC_BEFORE([$0],[AC_PROG_FC])dnl
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AC_MSG_CHECKING(whether to enable debugging)
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m4_define(ax_enable_debug_default,[m4_tolower(m4_normalize(ifelse([$1],,[no],[$1])))])
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m4_define(ax_enable_debug_vars,[m4_normalize(ifelse([$2],,,[$2]))])
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m4_define(ax_disable_debug_vars,[m4_normalize(ifelse([$3],,[NDEBUG],[$3]))])
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AC_ARG_ENABLE(debug,
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[AS_HELP_STRING([--enable-debug]@<:@=ax_enable_debug_default@:>@,[compile with debugging; one of yes/info/profile/no])],
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[],enable_debug=ax_enable_debug_default)
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if test "x$enable_debug" = "xyes" || test "x$enable_debug" = "x"; then
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AC_MSG_RESULT(yes)
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CFLAGS="${CFLAGS} -g -O0"
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CXXFLAGS="${CXXFLAGS} -g -O0"
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FFLAGS="${FFLAGS} -g -O0"
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FCFLAGS="${FCFLAGS} -g -O0"
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OBJCFLAGS="${OBJCFLAGS} -g -O0"
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dnl Define various variables if debugging is enabled.
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m4_map_args_w(ax_enable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is enabled])])
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else
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if test "x$enable_debug" = "xinfo"; then
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AC_MSG_RESULT(info)
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CFLAGS="${CFLAGS} -g"
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CXXFLAGS="${CXXFLAGS} -g"
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FFLAGS="${FFLAGS} -g"
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FCFLAGS="${FCFLAGS} -g"
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OBJCFLAGS="${OBJCFLAGS} -g"
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elif test "x$enable_debug" = "xprofile"; then
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AC_MSG_RESULT(profile)
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CFLAGS="${CFLAGS} -g -pg"
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CXXFLAGS="${CXXFLAGS} -g -pg"
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FFLAGS="${FFLAGS} -g -pg"
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FCFLAGS="${FCFLAGS} -g -pg"
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OBJCFLAGS="${OBJCFLAGS} -g -pg"
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LDFLAGS="${LDFLAGS} -pg"
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else
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AC_MSG_RESULT(no)
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dnl Ensure AC_PROG_CC/CXX/F77/FC/OBJC will not enable debug flags
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dnl by setting any unset environment flag variables
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if test "x${CFLAGS+set}" != "xset"; then
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CFLAGS=""
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fi
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if test "x${CXXFLAGS+set}" != "xset"; then
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CXXFLAGS=""
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fi
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if test "x${FFLAGS+set}" != "xset"; then
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FFLAGS=""
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fi
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if test "x${FCFLAGS+set}" != "xset"; then
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FCFLAGS=""
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fi
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if test "x${OBJCFLAGS+set}" != "xset"; then
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OBJCFLAGS=""
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fi
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fi
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dnl Define various variables if debugging is disabled.
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dnl assert.h is a NOP if NDEBUG is defined, so define it by default.
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m4_map_args_w(ax_disable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is disabled])])
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fi
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ax_enable_debug=$enable_debug
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])
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