bfd/warning.m4

   1 dnl Common configure.in fragment
   2
   3 AC_DEFUN([AM_BINUTILS_WARNINGS],[
   4 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
   5 AC_EGREP_CPP([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow")
   6
   7 AC_ARG_ENABLE(werror,
   8   [  --enable-werror         treat compile warnings as errors],
   9   [case "${enableval}" in
  10      yes | y) ERROR_ON_WARNING="yes" ;;
  11      no | n)  ERROR_ON_WARNING="no" ;;
  12      *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
  13    esac])
  14
  15 # Disable -Wformat by default when using gcc on mingw
  16 case "${host}" in
  17   *-*-mingw32*)
  18     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
  19       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
  20     fi
  21     ;;
  22   *) ;;
  23 esac
  24
  25 # Enable -Werror by default when using gcc
  26 if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
  27     ERROR_ON_WARNING=yes
  28 fi
  29
  30 NO_WERROR=
  31 if test "${ERROR_ON_WARNING}" = yes ; then
  32     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
  33     NO_WERROR="-Wno-error"
  34 fi
  35
  36 if test "${GCC}" = yes ; then
  37   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
  38 fi
  39
  40 AC_ARG_ENABLE(build-warnings,
  41 [  --enable-build-warnings enable build-time compiler warnings],
  42 [case "${enableval}" in
  43   yes)  WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
  44   no)   if test "${GCC}" = yes ; then
  45           WARN_CFLAGS="-w"
  46         fi;;
  47   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
  48         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
  49   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
  50         WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
  51   *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
  52 esac])
  53
  54 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
  55   echo "Setting warning flags = $WARN_CFLAGS" 6>&1
  56 fi
  57
  58 AC_SUBST(WARN_CFLAGS)
  59 AC_SUBST(NO_WERROR)
  60 ])