Fix AX_CFLAGS_GCC_OPTION to make it work with autoconf 2.67.

diff --git a/m4/ax_cflags_gcc_option.m4 b/m4/ax_cflags_gcc_option.m4
index d5e6cd1517a6c6b6ec84a991a00ab42647772203..c01daefabeecef5016df6f0ac461f9f0c2bfa11f 100644 (file)
--- a/m4/ax_cflags_gcc_option.m4
+++ b/m4/ax_cflags_gcc_option.m4
@@ -76,7 +76,7 @@ AC_DEFUN([AX_CFLAGS_GCC_OPTION_OLD], [dnl
 AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
 AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_gcc_option_$2])dnl
 AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for gcc m4_ifval($2,$2,-option)],
-VAR,[VAR="no, unknown"
+VAR,[AS_VAR_SET([VAR], ["no, unknown"])
  AC_LANG_SAVE
  AC_LANG_C
  ac_save_[]FLAGS="$[]FLAGS"
@@ -86,19 +86,20 @@ in "-pedantic -Werror % m4_ifval($2,$2,-option)"  dnl   GCC
    #
 do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
    AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+   [AS_VAR_SET([VAR],[`echo $ac_arg | sed -e 's,.*% *,,'`]) ; break])
 done
  FLAGS="$ac_save_[]FLAGS"
  AC_LANG_RESTORE
 ])
-case ".$VAR" in
+AS_VAR_COPY([ac_res], [VAR])
+case ".${ac_res}" in
      .ok|.ok,*) m4_ifvaln($3,$3) ;;
    .|.no|.no,*) m4_ifvaln($4,$4) ;;
    *) m4_ifvaln($3,$3,[
-   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
-   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
-   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
-                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
+   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " ${ac_res} " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain ${ac_res}])
+   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) ${ac_res}"])
+                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) ${ac_res}"
    fi ]) ;;
 esac
 AS_VAR_POPDEF([VAR])dnl
@@ -112,7 +113,7 @@ AC_DEFUN([AX_CXXFLAGS_GCC_OPTION_OLD], [dnl
 AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
 AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_gcc_option_$2])dnl
 AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for gcc m4_ifval($2,$2,-option)],
-VAR,[VAR="no, unknown"
+VAR,[AS_VAR_SET([VAR],["no, unknown"])
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  ac_save_[]FLAGS="$[]FLAGS"
@@ -122,19 +123,20 @@ in "-pedantic -Werror % m4_ifval($2,$2,-option)"  dnl   GCC
    #
 do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
    AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+   [AS_VAR_SET([VAR],[`echo $ac_arg | sed -e 's,.*% *,,'`]) ; break])
 done
  FLAGS="$ac_save_[]FLAGS"
  AC_LANG_RESTORE
 ])
-case ".$VAR" in
+AS_VAR_COPY([ac_res], [VAR])
+case ".${ac_res}" in
      .ok|.ok,*) m4_ifvaln($3,$3) ;;
    .|.no|.no,*) m4_ifvaln($4,$4) ;;
    *) m4_ifvaln($3,$3,[
-   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
-   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
-   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
-                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
+   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " ${VAR} " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain ${ac_res}])
+   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) ${ac_res}"])
+                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) ${ac_res}"
    fi ]) ;;
 esac
 AS_VAR_POPDEF([VAR])dnl
@@ -147,7 +149,7 @@ AC_DEFUN([AX_CFLAGS_GCC_OPTION_NEW], [dnl
 AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
 AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_gcc_option_$1])dnl
 AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)],
-VAR,[VAR="no, unknown"
+VAR,[AS_VAR_SET([VAR],["no, unknown"])
  AC_LANG_SAVE
  AC_LANG_C
  ac_save_[]FLAGS="$[]FLAGS"
@@ -157,19 +159,20 @@ in "-pedantic -Werror % m4_ifval($1,$1,-option)"  dnl   GCC
    #
 do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
    AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+   [AS_VAR_SET([VAR],[`echo $ac_arg | sed -e 's,.*% *,,'`]) ; break])
 done
  FLAGS="$ac_save_[]FLAGS"
  AC_LANG_RESTORE
 ])
-case ".$VAR" in
+AS_VAR_COPY([ac_res], [VAR])
+case ".${ac_res}" in
      .ok|.ok,*) m4_ifvaln($3,$3) ;;
    .|.no|.no,*) m4_ifvaln($4,$4) ;;
    *) m4_ifvaln($3,$3,[
-   if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
-   then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain $VAR])
-   else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"])
-                      m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"
+   if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " ${ac_res} " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain ${ac_res}])
+   else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) ${ac_res}"])
+                      m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) ${ac_res}"
    fi ]) ;;
 esac
 AS_VAR_POPDEF([VAR])dnl
@@ -183,7 +186,7 @@ AC_DEFUN([AX_CXXFLAGS_GCC_OPTION_NEW], [dnl
 AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
 AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_gcc_option_$1])dnl
 AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)],
-VAR,[VAR="no, unknown"
+VAR,[AS_VAR_SET([VAR],["no, unknown"])
  AC_LANG_SAVE
  AC_LANG_CPLUSPLUS
  ac_save_[]FLAGS="$[]FLAGS"
@@ -193,19 +196,20 @@ in "-pedantic -Werror % m4_ifval($1,$1,-option)"  dnl   GCC
    #
 do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
    AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+   [AS_VAR_SET([VAR],[`echo $ac_arg | sed -e 's,.*% *,,'`]) ; break])
 done
  FLAGS="$ac_save_[]FLAGS"
  AC_LANG_RESTORE
 ])
-case ".$VAR" in
+AS_VAR_COPY([ac_res], [VAR])
+case ".${ac_res}" in
      .ok|.ok,*) m4_ifvaln($3,$3) ;;
    .|.no|.no,*) m4_ifvaln($4,$4) ;;
    *) m4_ifvaln($3,$3,[
-   if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
-   then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain $VAR])
-   else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"])
-                      m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"
+   if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " ${ac_res} " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain ${ac_res}])
+   else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) ${ac_res}"])
+                      m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) ${ac_res}"
    fi ]) ;;
 esac
 AS_VAR_POPDEF([VAR])dnl