build-sys: add -Werror to UL_WARN_ADD test

 ... so revert previous patches with extra options for clang.

Sometimes is simple solution so obvious that it's invisible :-)

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 4 insertions, 55 deletions

diff --git a/m4/compiler.m4 b/m4/compiler.m4
index cbd406f58..eb94510e3 100644
--- a/m4/compiler.m4
+++ b/m4/compiler.m4
@@ -14,14 +14,14 @@ m4_ifdef([AS_VAR_APPEND],
 [m4_define([UL_AS_VAR_APPEND],
 [AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
 
-#
+# UL_ADD_WARN([parameter])
+# ------------------------
 # Adds parameter to WARN_CFLAGS if the compiler supports it.
-#
-AC_DEFUN([UL_ADD_WARN_CFLAG], [
+AC_DEFUN([UL_WARN_ADD], [
   AS_VAR_PUSHDEF([ul_Warn], [ul_cv_warn_$1])dnl
   AC_CACHE_CHECK([whether compiler handles $1], m4_defn([ul_Warn]), [
     ul_save_CPPFLAGS="$CPPFLAGS"
-    CPPFLAGS="${CPPFLAGS} $1"
+    CPPFLAGS="-Werror ${CPPFLAGS} $1"
     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
                       [AS_VAR_SET(ul_Warn, [yes])],
                       [AS_VAR_SET(ul_Warn, [no])])
@@ -30,54 +30,3 @@ AC_DEFUN([UL_ADD_WARN_CFLAG], [
   AS_VAR_IF(ul_Warn, [yes], [UL_AS_VAR_APPEND([WARN_CFLAGS], [" $1"])])
 ])
 
-# UL_WARN_ADD(PARAMETER, [EXCLUDE_CC_LIST])
-# -----------------------------------------
-# Adds parameter to WARN_CFLAGS if the compiler supports it. Ignore the
-# parameter if compiler is in exclude list.
-AC_DEFUN([UL_WARN_ADD], [
-m4_ifval([$2], [
-  warn_exclude="$2"
-  case $compiler_clang in
-    yes) warn_cc=clang ;;
-      *) warn_cc=$CC ;;
-  esac
-  case ${warn_exclude} in
-    *${warn_cc}*)
-      AC_MSG_CHECKING([whether compiler handles $1])
-      AC_MSG_RESULT([excluded])
-      ;;
-    *)
-      UL_ADD_WARN_CFLAG([$1])
-      ;;
-  esac],
-  [UL_ADD_WARN_CFLAG([$1])])
-])
-
-
-# UL_PROG_CLANG
-# -------------
-# Checks if compiler is clang, defines compiler_clang=yes if yes.
-#
-# Note that generic CC variable is not modified by this function.  It's
-# possible that CC is set to 'cc' and the file /usr/bin/cc is a symlink to
-# /usr/bin/clang, then compiler_clang is also set ot 'yes'.
-AC_DEFUN([UL_PROG_CLANG], [
-  AC_REQUIRE([AC_PROG_CC])
-  AC_CACHE_CHECK([whether clang is in use], [ul_cv_clang], [
-    case ${CC} in #(
-      *gcc*)   ul_cv_clang=no ;;
-      *clang*) ul_cv_clang=yes ;;
-      *) AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main() {
-           #ifdef __clang__
-               return 0;
-             #else
-               #error The __clang__ was not defined
-             #endif
-           }])],
-           [ul_cv_clang=yes],
-           [ul_cv_clang=no]
-         ) ;;
-    esac
-  ])
-  compiler_clang=$ul_cv_clang
-])