diff options
Diffstat (limited to 'm4/ax_check_enable_debug.m4')
| -rw-r--r-- | m4/ax_check_enable_debug.m4 | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/m4/ax_check_enable_debug.m4 b/m4/ax_check_enable_debug.m4 new file mode 100644 index 0000000..37add91 --- /dev/null +++ b/m4/ax_check_enable_debug.m4 @@ -0,0 +1,113 @@ +# =========================================================================== +# http://autoconf-archive.cryp.to/ax_check_enable_debug.html +# =========================================================================== +# +# SYNOPSIS +# +# Check for the presence of an --enable-debug option to configure and +# allow/avoid compiled debugging flags appropriately. +# +# 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. +# +# LAST MODIFICATION +# +# 2014-05-12 +# +# COPYLEFT +# +# Copyright (c) 2011 Rhys Ulerich <rhys.ulerich@gmail.com> +# Copyright © 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. + +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],[$3]))]) + + AC_ARG_ENABLE(debug, + [AS_HELP_STRING([--enable-debug]@<:@=ax_enable_debug_default@:>@,[compile with debugging; one of yes/info/profile/no])], + [],enable_debug=ax_enable_debug_default) + if test "x$enable_debug" = "xyes" || test "x$enable_debug" = "x"; then + AC_MSG_RESULT(yes) + CFLAGS="${CFLAGS} -g -O0" + CXXFLAGS="${CXXFLAGS} -g -O0" + FFLAGS="${FFLAGS} -g -O0" + FCFLAGS="${FCFLAGS} -g -O0" + OBJCFLAGS="${OBJCFLAGS} -g -O0" + + dnl Define various variables if debugging is enabled. + m4_map_args_w(ax_enable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is enabled])]) + else + if test "x$enable_debug" = "xinfo"; then + AC_MSG_RESULT(info) + CFLAGS="${CFLAGS} -g" + CXXFLAGS="${CXXFLAGS} -g" + FFLAGS="${FFLAGS} -g" + FCFLAGS="${FCFLAGS} -g" + OBJCFLAGS="${OBJCFLAGS} -g" + elif test "x$enable_debug" = "xprofile"; then + AC_MSG_RESULT(profile) + CFLAGS="${CFLAGS} -g -pg" + CXXFLAGS="${CXXFLAGS} -g -pg" + FFLAGS="${FFLAGS} -g -pg" + FCFLAGS="${FCFLAGS} -g -pg" + OBJCFLAGS="${OBJCFLAGS} -g -pg" + LDFLAGS="${LDFLAGS} -pg" + else + AC_MSG_RESULT(no) + dnl Ensure AC_PROG_CC/CXX/F77/FC/OBJC will not enable debug flags + dnl by setting any unset environment flag variables + if test "x${CFLAGS+set}" != "xset"; then + CFLAGS="" + fi + if test "x${CXXFLAGS+set}" != "xset"; then + CXXFLAGS="" + fi + if test "x${FFLAGS+set}" != "xset"; then + FFLAGS="" + fi + if test "x${FCFLAGS+set}" != "xset"; then + FCFLAGS="" + fi + if test "x${OBJCFLAGS+set}" != "xset"; then + OBJCFLAGS="" + fi + fi + + dnl Define various variables if debugging is disabled. + dnl assert.h is a NOP if NDEBUG is defined, so define it by default. + m4_map_args_w(ax_disable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is disabled])]) + fi + ax_enable_debug=$enable_debug +]) |