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# gcc default/debug CFLAGS handling respecting user's CFLAGS
# avoid AC_PROG_CC setting -O2 CFLAGS which will override DEBUG_CFLAGS' -O0
# must be used right after AC_INIT
AC_DEFUN([AX_DEBUG_CFLAGS], [
# ensure CFLAGS are set
AS_IF([test "${CFLAGS+set}"], [
USE_DEFAULT_CFLAGS=false
], [
USE_DEFAULT_CFLAGS=true
CFLAGS=""
])
AC_PROG_CC
# add --enable-debug arg
AC_ARG_ENABLE([debug], AS_HELP_STRING([--enable-debug], [enable debug build]), [], [])
AS_IF([test "$enable_debug" = "yes"], [
# add the DEBUG pre-processor define
AC_DEFINE([DEBUG], [1], [debug build])
# gcc/gdb debug options
AS_IF([test "$GCC" = "yes"], [
DEBUG_CFLAGS="-ggdb -O0"
], [
ACX_DEBUG_CFLAGS_G
])
], [
# what AC_PROG_CC would have done if CFLAGS were not set
AS_IF([$USE_DEFAULT_CFLAGS], [
ACX_DEBUG_CFLAGS_G
AS_IF([test "$GCC" = "yes"], [
DEBUG_CFLAGS="$DEBUG_CFLAGS -O2"
])
])
])
AC_SUBST([DEBUG_CFLAGS], [$DEBUG_CFLAGS])
])
AC_DEFUN([ACX_DEBUG_CFLAGS_G], [
# default to -g
AS_IF([test "$ac_cv_prog_cc_g" = "yes"], [
DEBUG_CFLAGS="-g"
], [
DEBUG_CFLAGS=""
])
])
|
