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avoid autoconf warning

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Autoconf warned about this:
configure.ac:72: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE\
  call detected in body
That's warning about the use via AC_COMPILE_IFELSE without
specifying a language.  The easiest way to work around that is
to avoid the use of CC altogether and instead to use the preprocessor.
* configure.ac (cc_supports_flag): Use AC_PREPROC_IFELSE in place
of AC_COMPILE_IFELSE (and CPPFLAGS in place of CFLAGS).

Signed-off-by: Angus Salkeld <asalkeld@redhat.com>
This commit is contained in:
Jim Meyering 2011-05-17 13:18:56 +02:00 committed by Angus Salkeld
parent 9c467cb150
commit 8ac48bac1b
1 changed files with 2 additions and 2 deletions
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4
configure.ac
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@ -67,9 +67,9 @@ AM_CONDITIONAL(HAVE_SPLINT, test -n "${SPLINT}")
# this function checks if CC support options passed as
# args. Global CFLAGS are ignored during this test.
cc_supports_flag() {
local CFLAGS="$@"
local CPPFLAGS="$CPPFLAGS $@"
AC_MSG_CHECKING([whether $CC supports "$@"])
AC_COMPILE_IFELSE([int main(){return 0;}] ,
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
[RC=0; AC_MSG_RESULT([yes])],
[RC=1; AC_MSG_RESULT([no])])
return $RC