scripts: check for, and warn about an unset CT_PREFIX_DIR
The user shall provide a directory to install the toolchain into.
If he/she does not, this is an error, and shall be detected properly,
rather than relying on failure down the road.
Thanks to "Pedro I. Sanchez" <psanchez@colcan.ca> for pointing out
the issue:
http://sourceware.org/ml/crossgcc/2009-12/msg00011.html
(transplanted from e94f4ffddd1d07b3841160db71694cd19fda6b03)
1 diff -durN binutils-2.16.1.orig/gas/config/tc-i386.c binutils-2.16.1/gas/config/tc-i386.c
2 --- binutils-2.16.1.orig/gas/config/tc-i386.c 2005-04-13 19:58:42.000000000 +0200
3 +++ binutils-2.16.1/gas/config/tc-i386.c 2008-09-22 09:00:09.000000000 +0200
8 -#if (defined (TE_I386AIX) \
9 - || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) \
10 - && !defined (TE_LINUX) \
11 - && !defined (TE_NETWARE) \
12 - && !defined (TE_FreeBSD) \
13 - && !defined (TE_NetBSD)))
14 /* This array holds the chars that always start a comment. If the
15 pre-processor is disabled, these aren't very useful. */
16 -const char comment_chars[] = "#/";
17 -#define PREFIX_SEPARATOR '\\'
18 +const char comment_chars[] = "#";
19 +#define PREFIX_SEPARATOR '/'
21 /* This array holds the chars that only start a comment at the beginning of
22 a line. If the line seems to have the form '# 123 filename'
24 #NO_APP at the beginning of its output.
25 Also note that comments started like this one will always work if
26 '/' isn't otherwise defined. */
27 -const char line_comment_chars[] = "#";
30 -/* Putting '/' here makes it impossible to use the divide operator.
31 - However, we need it for compatibility with SVR4 systems. */
32 -const char comment_chars[] = "#";
33 -#define PREFIX_SEPARATOR '/'
35 -const char line_comment_chars[] = "/#";
37 +const char line_comment_chars[] = "#/";
39 const char line_separator_chars[] = ";";