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ax_check_enable_debug.m4
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# ===========================================================================
# 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 ...], [IS-RELEASE])
#
# 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.
#
# IS-RELEASE can be used to change the default to 'no' when making a
# release. Set IS-RELEASE to 'yes' or 'no' as appropriate. By default, it
# uses the value of $ax_is_release, so if you are using the AX_IS_RELEASE
# macro, there is no need to pass this parameter.
#
# AX_IS_RELEASE([git-directory])
# AX_CHECK_ENABLE_DEBUG()
#
# LICENSE
#
# Copyright (c) 2011 Rhys Ulerich <[email protected]>
# Copyright (c) 2014, 2015 Philip Withnall <[email protected]>
#
# 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 5
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)
ax_enable_debug_default=m4_tolower(m4_normalize(ifelse([$1],,[no],[$1])))
ax_enable_debug_is_release=m4_tolower(m4_normalize(ifelse([$4],,
[$ax_is_release],
[$4])))
# If this is a release, override the default.
AS_IF([test "$ax_enable_debug_is_release" = "yes"],
[ax_enable_debug_default="no"])
m4_define(ax_enable_debug_vars,[m4_normalize(ifelse([$2],,,[$2]))])
m4_define(ax_disable_debug_vars,[m4_normalize(ifelse([$3],,[NDEBUG],[$3]))])
AC_ARG_ENABLE(debug,
[AS_HELP_STRING([--enable-debug=]@<:@yes/info/profile/no@:>@,[compile with debugging])],
[],enable_debug=$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
])