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Fix shell code in AS_TR_SH documentation.

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* doc/autoconf.texi (Common Shell Constructs) <AS_TR_SH>: Fix
example to expand to valid shell code.
Reported by Ralf Wildenhues.

Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2010-03-02 15:39:58 -07:00
parent 026070fea8
commit d174a5362e
2 changed files with 10 additions and 2 deletions
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ChangeLog
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@ -1,5 +1,10 @@
2010-03-02 Eric Blake <eblake@redhat.com>
Fix shell code in AS_TR_SH documentation.
* doc/autoconf.texi (Common Shell Constructs) <AS_TR_SH>: Fix
example to expand to valid shell code.
Reported by Ralf Wildenhues.
Improve documentation on AC_{COMPILE,LINK}_IFELSE.
* doc/autoconf.texi (Running the Compiler): Mention that the
object file is available after a successful compile.

7
doc/autoconf.texi
View File

@ -13206,12 +13206,15 @@ echo "[#]define AS_TR_CPP([HAVE_$type]) 1"
@defmac AS_TR_SH (@var{expression})
@asindex{TR_SH}
Transform @var{expression} into a valid shell variable name. For example:
Transform @var{expression} into shell code that generates a valid shell
variable name. The result is literal when possible at m4 time, but must
be used with @code{eval} if @var{expression} causes shell indirections.
For example:
@example
# This outputs "Have it!".
header="sys/some file.h"
AS_TR_SH([HAVE_$header])=yes
eval AS_TR_SH([HAVE_$header])=yes
if test "x$HAVE_sys_some_file_h" = xyes; then echo "Have it!"; fi
@end example
@end defmac