mirror of https://github.com/xiph/flac
125 lines
4.5 KiB
Plaintext
125 lines
4.5 KiB
Plaintext
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# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/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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# AX_CHECK_ENABLE_DEBUG([enable by default=yes/info/profile/no], [ENABLE DEBUG VARIABLES ...], [DISABLE DEBUG VARIABLES NDEBUG ...], [IS-RELEASE])
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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
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# the specified default value used when the option is not present. Return
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# the 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
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# languages. Specifying 'info' adds '-g' to the compilation flags.
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# Specifying 'profile' adds '-g -pg' to the compilation flags and '-pg' to
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# the linking flags. 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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# IS-RELEASE can be used to change the default to 'no' when making a
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# release. Set IS-RELEASE to 'yes' or 'no' as appropriate. By default, it
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# uses the value of $ax_is_release, so if you are using the AX_IS_RELEASE
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# macro, there is no need to pass this parameter.
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#
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# AX_IS_RELEASE([git-directory])
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# AX_CHECK_ENABLE_DEBUG()
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#
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# LICENSE
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#
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# Copyright (c) 2011 Rhys Ulerich <rhys.ulerich@gmail.com>
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# Copyright (c) 2014, 2015 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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#serial 5
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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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ax_enable_debug_default=m4_tolower(m4_normalize(ifelse([$1],,[no],[$1])))
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ax_enable_debug_is_release=m4_tolower(m4_normalize(ifelse([$4],,
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[$ax_is_release],
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[$4])))
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# If this is a release, override the default.
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AS_IF([test "$ax_enable_debug_is_release" = "yes"],
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[ax_enable_debug_default="no"])
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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],[$3]))])
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AC_ARG_ENABLE(debug,
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[AS_HELP_STRING([--enable-debug=]@<:@yes/info/profile/no@:>@,[compile with debugging])],
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[],enable_debug=$ax_enable_debug_default)
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# empty mean debug yes
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AS_IF([test "x$enable_debug" = "x"],
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[enable_debug="yes"])
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# case of debug
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AS_CASE([$enable_debug],
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[yes],[
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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="${OBJCFLAGS} -g -O0"
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],
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[info],[
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AC_MSG_RESULT(info)
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CFLAGS="${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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],
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[profile],[
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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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],
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[
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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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AS_IF([test "x${CFLAGS+set}" != "xset"],
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[CFLAGS=""])
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AS_IF([test "x${CXXFLAGS+set}" != "xset"],
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[CXXFLAGS=""])
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AS_IF([test "x${FFLAGS+set}" != "xset"],
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[FFLAGS=""])
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AS_IF([test "x${FCFLAGS+set}" != "xset"],
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[FCFLAGS=""])
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AS_IF([test "x${OBJCFLAGS+set}" != "xset"],
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[OBJCFLAGS=""])
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])
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dnl Define various variables if debugging is disabled.
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dnl assert.h is a NOP if NDEBUG is defined, so define it by default.
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AS_IF([test "x$enable_debug" = "xyes"],
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[m4_map_args_w(ax_enable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is enabled])])],
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[m4_map_args_w(ax_disable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is disabled])])])
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ax_enable_debug=$enable_debug
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])
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