dnl authorization. *
dnl***************************************************************************
dnl
-dnl $Id: aclocal.m4,v 1.185 2020/11/14 15:26:19 tom Exp $
+dnl $Id: aclocal.m4,v 1.187 2020/11/26 22:37:55 tom Exp $
dnl
dnl Author: Thomas E. Dickey
dnl
fi
])dnl
dnl ---------------------------------------------------------------------------
-dnl CF_CLANG_COMPILER version: 4 updated: 2020/10/31 15:46:50
+dnl CF_CLANG_COMPILER version: 6 updated: 2020/11/26 17:37:55
dnl -----------------
dnl Check if the given compiler is really clang. clang's C driver defines
dnl __GNUC__ (fooling the configure script into setting $GCC to yes) but does
AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
fi
+CLANG_VERSION=none
+
if test "x$ifelse([$2],,CLANG_COMPILER,[$2])" = "xyes" ; then
+ case "$CC" in
+ (c[[1-9]][[0-9]]|*/c[[1-9]][[0-9]])
+ AC_MSG_WARN(replacing broken compiler alias $CC)
+ CFLAGS="$CFLAGS -std=`echo "$CC" | sed -e 's%.*/%%'`"
+ CC=clang
+ ;;
+ esac
+
+ AC_MSG_CHECKING(version of $CC)
+ CLANG_VERSION="`$CC --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(CLANG[[^)]]*) //' -e 's/^.*(Debian[[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
+ test -z "$CLANG_VERSION" && CLANG_VERSION=unknown
+ AC_MSG_RESULT($CLANG_VERSION)
+
for cf_clang_opt in \
-Qunused-arguments \
-Wno-error=implicit-function-declaration
do
AC_MSG_CHECKING(if option $cf_clang_opt works)
+ cf_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cf_clang_opt"
AC_TRY_LINK([
#include <stdio.h>],[
printf("hello!\n");],[
cf_clang_optok=yes],[
cf_clang_optok=no])
AC_MSG_RESULT($cf_clang_optok)
+ CFLAGS="$cf_save_CFLAGS"
if test $cf_clang_optok = yes; then
CF_VERBOSE(adding option $cf_clang_opt)
CF_APPEND_TEXT(CFLAGS,$cf_clang_opt)