diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/configure.in b/configure.in index dfad86ed..65570d62 100644 --- a/configure.in +++ b/configure.in @@ -91,6 +91,20 @@ fi #### gcc warning flags +cc_supports_flag() { + AC_MSG_CHECKING(whether $CC supports "$@") + Cfile=/tmp/foo${$} + touch ${Cfile}.c + $CC -c "$@" ${Cfile}.c -o ${Cfile}.o >/dev/null 2>&1 + rc=$? + rm -f ${Cfile}.c ${Cfile}.o + case $rc in + 0) AC_MSG_RESULT(yes);; + *) AC_MSG_RESULT(no);; + esac + return $rc +} + if test "x$GCC" = "xyes"; then changequote(,)dnl case " $CFLAGS " in @@ -140,7 +154,10 @@ if test "x$GCC" = "xyes"; then case " $CFLAGS " in *[\ \ ]-Wdeclaration-after-statement[\ \ ]*) ;; - *) CFLAGS="$CFLAGS -Wdeclaration-after-statement" ;; + *) if cc_supports_flag -Wdeclaration-after-statement; then + CFLAGS="$CFLAGS -Wdeclaration-after-statement" + fi + ;; esac if test "x$enable_ansi" = "xyes"; then |