Re: changing compiler flags at configure time

[Eric Blake]

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According to Eric Blake on 6/15/2006 9:50 PM:
>       * configure.ac: Likewise.
>       (M4_DEFAULT_PRELOAD): Use as a macro, not shell variable.

+AC_DEFUN([M4_DEFAULT_PRELOAD], [m4 traditional gnu])
 AC_MSG_CHECKING([for modules to preload])
- -  m4_pattern_allow([^m4_default_preload$])
- -  m4_default_preload="m4 traditional gnu"
   DLPREOPEN=

   AC_ARG_WITH([modules],
     [AS_HELP_STRING([--with-modules=MODULES],
- -                 [preload MODULES @<:@default: $m4_default_preload@:>@])],
+                   [preload MODULES @<:@default: ]M4_DEFAULT_PRELOAD[@:>@])],
     [use_modules="$withval"],
- -    [use_modules="$m4_default_preload"])
+    [use_modules="$M4_DEFAULT_PRELOAD"])

Oops - that expanded as
use_modules="$m4 traditional gnu"
which obviously doesn't work if m4 is an undefined shell variable. Obvious
fix checked in:

2006-06-15  Eric Blake  <address@hidden>

        * configure.ac (M4_DEFAULT_PRELOAD): Fix typo in last commit.

$ cvs diff configure.ac
Index: configure.ac
===================================================================
RCS file: /sources/m4/m4/configure.ac,v
retrieving revision 1.47
diff -u -p -r1.47 configure.ac
- --- configure.ac        16 Jun 2006 03:51:28 -0000      1.47
+++ configure.ac        16 Jun 2006 05:08:29 -0000
@@ -70,7 +70,7 @@ AC_MSG_CHECKING([for modules to preload]
     [AS_HELP_STRING([--with-modules=MODULES],
                    [preload MODULES @<:@default: ]M4_DEFAULT_PRELOAD[@:>@])],
     [use_modules="$withval"],
- -    [use_modules="$M4_DEFAULT_PRELOAD"])
+    [use_modules="M4_DEFAULT_PRELOAD"])

   PREOPEN_DEPENDENCIES=
   DLPREOPEN="-dlpreopen force"



- --
Life is short - so eat dessert first!

Eric Blake             address@hidden
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