flags.m4 1.07 KB
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# <rdenis (at) simphalempin (dot) com>.
# This file (flags.m4) is free software; unlimited permission to
# copy and/or distribute it , with or without modifications, as long
# as this notice is preserved.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

AC_DEFUN([RDC_PROG_CC_FLAGS_IFELSE],
[AC_LANG_ASSERT(C)
  CFLAGS_save="${CFLAGS}"
  as_ac_var=`echo "ac_cv_prog_cc_flags_$1" | $as_tr_sh`
  AC_CACHE_CHECK([if $CC accepts $1], [$as_ac_var], [
    CFLAGS="$1 ${CFLAGS_save}"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
      eval "$as_ac_var=yes"
    ],[
      eval "$as_ac_var=no"
    ])
  ])

  ac_res=`echo "${as_ac_var}"`
  AS_IF([test "${ac_res}" != "no"], [
    CFLAGS="$1 ${CFLAGS_save}"
    CXXFLAGS="$1 ${CFLAGS_save}"
    OBJCFLAGS="$1 ${OBJCFLAGS_save}"
    $2
  ], [
    CFLAGS="${CFLAGS_save}"
    $3
  ])
])

AC_DEFUN([RDC_PROG_CC_WFLAGS],
[ for a in $1; do
    RDC_PROG_CC_FLAGS_IFELSE([-W$a])
  done
])