cares-compilers.m4

          dnl Highest warning level is double -A, next is single -A.
          dnl Due to the big number of warnings these trigger on third
          dnl party header files it is impractical for us to use any of
          dnl them here. If you want them simply define it in CPPFLAGS.
          tmp_CFLAGS="$tmp_CFLAGS"
        fi
        ;;
        #
      SGI_MIPS_C)
        #
        if test "$want_warnings" = "yes"; then
          dnl Perform stricter semantic and lint-like checks
          tmp_CFLAGS="$tmp_CFLAGS -fullwarn"
        fi
        ;;
        #
      SGI_MIPSPRO_C)
        #
        if test "$want_warnings" = "yes"; then
          dnl Perform stricter semantic and lint-like checks
          tmp_CFLAGS="$tmp_CFLAGS -fullwarn"
          dnl Disable some remarks
          dnl #1209: controlling expression is constant
          tmp_CFLAGS="$tmp_CFLAGS -woff 1209"
        fi
        ;;
        #
      SUNPRO_C)
        #
        if test "$want_warnings" = "yes"; then
          dnl Perform stricter semantic and lint-like checks
          tmp_CFLAGS="$tmp_CFLAGS -v"
        fi
        ;;
        #
      TINY_C)
        #
        if test "$want_warnings" = "yes"; then
          dnl Activate all warnings
          tmp_CFLAGS="$tmp_CFLAGS -Wall"
          dnl Make string constants be of type const char *
          tmp_CFLAGS="$tmp_CFLAGS -Wwrite-strings"
          dnl Warn use of unsupported GCC features ignored by TCC
          tmp_CFLAGS="$tmp_CFLAGS -Wunsupported"
        fi
        ;;
        #
      WATCOM_UNIX_C)
        #
        if test "$want_warnings" = "yes"; then
          dnl Issue all warnings
          tmp_CFLAGS="$tmp_CFLAGS -Wall -Wextra"
        fi
        ;;
        #
      WATCOM_WINDOWS_C)
        #
        dnl Placeholder
        tmp_CFLAGS="$tmp_CFLAGS"
        ;;
        #
    esac
    #
    squeeze tmp_CPPFLAGS
    squeeze tmp_CFLAGS
    #
    if test ! -z "$tmp_CFLAGS" || test ! -z "$tmp_CPPFLAGS"; then
      AC_MSG_CHECKING([if compiler accepts strict warning options])
      CPPFLAGS="$tmp_save_CPPFLAGS $tmp_CPPFLAGS"
      CFLAGS="$tmp_save_CFLAGS $tmp_CFLAGS"
      squeeze CPPFLAGS
      squeeze CFLAGS
      CARES_COMPILER_WORKS_IFELSE([
        AC_MSG_RESULT([yes])
        AC_MSG_NOTICE([compiler options added: $tmp_CFLAGS $tmp_CPPFLAGS])
      ],[
        AC_MSG_RESULT([no])
        AC_MSG_WARN([compiler options rejected: $tmp_CFLAGS $tmp_CPPFLAGS])
        dnl restore initial settings
        CPPFLAGS="$tmp_save_CPPFLAGS"
        CFLAGS="$tmp_save_CFLAGS"
      ])
    fi
    #
  fi
])


dnl CARES_SHFUNC_SQUEEZE
dnl -------------------------------------------------
dnl Declares a shell function squeeze() which removes
dnl redundant whitespace out of a shell variable.

AC_DEFUN([CARES_SHFUNC_SQUEEZE], [
squeeze() {
  _sqz_result=""
  eval _sqz_input=\[$][$]1
  for _sqz_token in $_sqz_input; do
    if test -z "$_sqz_result"; then
      _sqz_result="$_sqz_token"
    else
      _sqz_result="$_sqz_result $_sqz_token"
    fi
  done
  eval [$]1=\$_sqz_result
  return 0
}
])


dnl CARES_PROCESS_DEBUG_BUILD_OPTS
dnl -------------------------------------------------
dnl Settings which depend on configure's debug given
dnl option, and further configure the build process.
dnl Don't use this macro for compiler dependant stuff.

AC_DEFUN([CARES_PROCESS_DEBUG_BUILD_OPTS], [
  AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
  AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl
  AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl
  #
  if test "$want_debug" = "yes"; then

    dnl when doing the debug stuff, use static library only
    AC_DISABLE_SHARED

    debugbuild="yes"

    dnl the entire --enable-debug is a hack that lives and runs on top of
    dnl libcurl stuff so this BUILDING_LIBCURL is not THAT much uglier
    AC_DEFINE(BUILDING_LIBCURL, 1, [when building as static part of libcurl])

    CPPFLAGS="$CPPFLAGS -DCURLDEBUG"

    dnl CHECKME: Do we still need so specify this include path here?
    CPPFLAGS="$CPPFLAGS -I$srcdir/../include"

    squeeze CPPFLAGS
  fi
  #
])


dnl CARES_CHECK_PROG_CC
dnl -------------------------------------------------
dnl Check for compiler program, preventing CFLAGS and
dnl CPPFLAGS from being unexpectedly changed.

AC_DEFUN([CARES_CHECK_PROG_CC], [
  ac_save_CFLAGS="$CFLAGS"
  ac_save_CPPFLAGS="$CPPFLAGS"
  AC_PROG_CC
  CFLAGS="$ac_save_CFLAGS"
  CPPFLAGS="$ac_save_CPPFLAGS"
])


dnl CARES_VAR_MATCH (VARNAME, VALUE)
dnl -------------------------------------------------
dnl Verifies if shell variable VARNAME contains VALUE.
dnl Contents of variable VARNAME and VALUE are handled
dnl as whitespace separated lists of words. If at least
dnl one word of VALUE is present in VARNAME the match
dnl is considered positive, otherwise false.

AC_DEFUN([CARES_VAR_MATCH], [
  ac_var_match_word="no"
  for word1 in $[$1]; do
    for word2 in [$2]; do
      if test "$word1" = "$word2"; then
        ac_var_match_word="yes"
      fi
    done
  done
])


dnl CARES_VAR_MATCH_IFELSE (VARNAME, VALUE,
dnl                        [ACTION-IF-MATCH], [ACTION-IF-NOT-MATCH])
dnl -------------------------------------------------
dnl This performs a CURL_VAR_MATCH check and executes
dnl first branch if the match is positive, otherwise
dnl the second branch is executed.

AC_DEFUN([CARES_VAR_MATCH_IFELSE], [
  CARES_VAR_MATCH([$1],[$2])
  if test "$ac_var_match_word" = "yes"; then
  ifelse($3,,:,[$3])
  ifelse($4,,,[else
    $4])
  fi
])


dnl CARES_VAR_STRIP (VARNAME, VALUE)
dnl -------------------------------------------------
dnl Contents of variable VARNAME and VALUE are handled
dnl as whitespace separated lists of words. Each word
dnl from VALUE is removed from VARNAME when present.

AC_DEFUN([CARES_VAR_STRIP], [
  AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl
  ac_var_stripped=""
  for word1 in $[$1]; do
    ac_var_strip_word="no"
    for word2 in [$2]; do
      if test "$word1" = "$word2"; then
        ac_var_strip_word="yes"
      fi
    done
    if test "$ac_var_strip_word" = "no"; then
      ac_var_stripped="$ac_var_stripped $word1"
    fi
  done
  dnl squeeze whitespace out of result
  [$1]="$ac_var_stripped"
  squeeze [$1]
])