source: m4/acx_compilerflags.m4@ a97897

# AC_SET_COMPILER_FLAGS(optimization, debugging, warnings)
#----------------------------------------------------------------
AC_DEFUN([AC_SET_COMPILER_FLAGS],[
AC_MSG_NOTICE([Using AC@&t@_SET_COMPILER_FLAGS macro])

dnl optimization
if test ! x"$1" = xno; then
        if test x"$2" = xno; then
                if test x"$1" = xyes; then
                        optimization="-O2"
                else
                        optimization="-O$1"
                fi
        fi
fi
dnl debugging info
if ! test x"$2" = xno; then
        if test x"$2" = xyes; then
                debugging="-g3"
        else
                debugging="-g$2"
        fi
  AC_DEFINE(HAVE_DEBUG,1, ["Output debugging info"])
  AC_SUBST(HAVE_DEBUG)
fi

dnl enable all warnings
if test x"$3" = xsome; then
        dnl even without debugging we want some minimal info of something's utterly wrong
        Cwarnings="-Wall"
        CXXwarnings="-Wall"
fi
if test x"$3" = xfull; then
        Cwarnings="-Wall -W -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wshadow -Wpointer-arith -Wcast-align -Wcast-qual -Wwrite-strings -Wredundant-decls -Wnested-externs -Wmissing-noreturn -Wformat-security -Wmissing-format-attribute -Winit-self"
        CXXwarnings="-Wall -W -Wshadow -Wpointer-arith -Wcast-align -Wcast-qual -Wwrite-strings -Wredundant-decls -Wmissing-noreturn -Wformat-security -Wmissing-format-attribute -Winit-self"
fi
if test x"$3" = xnone; then
        unset Cwarnings
        unset CXXwarnings
else
        AC_DEFINE(HAVE_WARNINGS,$enable_warnings, ["Output compiler warnings"])
fi

# finally, apply whatever was set
CFLAGS="$CFLAGS $debugging $optimization $Cwarnings"
CXXFLAGS="$CXXFLAGS $debugging $optimization $CXXwarnings"

])