GNU autotools: Debug/Release targets?

Question

I\'ve been looking for this for a while: I\'m currently converting a medium-size program to autotools, coming from an Eclipse-based method (with makefiles)

I\'m alwa

Answer 1

Another example to configure CFLAGS/CXXFLAGS without editing Makefile.in or Makefile.am. Add this code to your configure.in or configure.ac file:

test -z "$SED" && SED=sed

AC_ARG_ENABLE([debug],
  [AS_HELP_STRING([--enable-debug],
                  [whether to include debug symbols (default is no)])],
  [enable_debug=$enableval],
  [enable_debug=no]
)

if test "x$enable_debug" = xyes; then
  dnl Remove all optimization flags from CFLAGS
  changequote({,})
  CFLAGS=`echo "$CFLAGS" | $SED -e 's/-O[0-9s]*//g'`
  CXXFLAGS=`echo "$CXXFLAGS" | $SED -e 's/-O[0-9s]*//g'`

  CFLAGS=`echo "$CFLAGS" | $SED -e 's/-g[0-9]*//g'`
  CXXFLAGS=`echo "$CXXFLAGS" | $SED -e 's/-g[0-9]*//g'`
  changequote([,])

  CFLAGS="$CFLAGS -g -O0"
  CXXFLAGS="$CXXFLAGS -g -O0"
fi

echo "CFLAGS=$CFLAGS"

Test it:

$ ./configure --enable-debug | grep CFLAGS